salt gland [
PO:0005661; plant anatomy term ]
A specialized tissue where excess salt absorbed in water from the soil is concentrated, being stores or excreted.
More Synonyms: glándula de sal (Spanish), 塩腺 (Japanese)
Comments: A crust of salt forms on leaves which tastes bad and the white surfaces act to reflect light. Example, as is Mangrove vegetation.
sapwood [
PO:0004513; plant anatomy term ]
A portion of secondary xylem (PO:0005848) that has as parts living secondary xylem parenchyma cells (PO:0004525).
More Synonyms: albura (Spanish), 液材、辺材 (Japanese)
Comments: Sapwood contains reserve materials and may function in the conduction of water and minerals (xylem sap (PO:0025539)). It is generally lighter colored than the heartwood (PO:0004512) and is located between the heartwood and the vascular cambium (PO:0005598) of a shoot axis (PO:0025029) or root (PO:0009005). Sapwood forms during a secondary xylem development stage (PO:0025427).
scale leaf [
PO:0006003; plant anatomy term ]
A phyllome that is reduced in size relative to a vascular leaf on the same plant and is often associated with a perennating or dormant bud or a vegetatively propagating organ such as a rhizome.
More Synonyms: catáfila en escama (Spanish), cataphyll, 鱗片葉 (Japanese)
Comments: May be photosynthetic or non-photosynthetic. Some species have vascular leaves that are scale-like (such as Juniperus, Thuja, and Chamaecyparis). Annotations for scale-like leaves should go under vascular leaf (PO:0009025), not scale leaf.
scale leaf margin [
PO:0025014; plant anatomy term ]
The margin of a scale leaf.
More Synonyms: 鱗片葉縁 (Japanese), margen de la hoja escamosa (Spanish)
Comments:
sclerenchyma [
PO:0005427; plant anatomy term ]
A supporting tissue composed of fibers or sclereids.
More Synonyms: esclerénquima (Spanish), portion of sclerenchyma tissue, portion of sclerenchymatous tissue, 厚膜組織 (Japanese)
Comments:
sclerenchyma cell [
PO:0000077; plant anatomy term ]
A ground tissue cell (PO:0025030) with a lignified secondary cell wall.
More Synonyms: célula esclerenquimática (Spanish), 厚膜組織 細胞 (Japanese)
Comments: May be dead at maturity. The secondary cell wall of a sclerenchyma cell is often thicker than other cell types in the same plant structure, but it is not always easy to distinguish from tracheary elements (PO:0000290) or sclerified parenchyma cells (PO:0000074). Compare with collenchyma cells (PO:0000075) that are always alive at maturity, have irregularly thickened primary cell walls, and do not have lignified secondary cell walls. Collenchyma cells provides flexibility while sclerenchyma cells provide hardness. Sclerenchyma cells include plant fiber cells (PO:0025407) and sclerid cells (PO:0025418).
sclerid cell [
PO:0025418; plant anatomy term ]
A sclerenchyma cell (PO:0000077) with many pits in the secondary cell wall.
More Synonyms: esclereida (Spanish), sclereid, sclerid, 厚膜細胞(scleroid?) (Japanese)
Comments: Usually not very elongated. The lumen of a sclerid cell is occluded by the secondary cell wall.
scutellar epithelium [
PO:0008048; plant anatomy term ]
A continuous layer of cylindrical cells covering the endosperm side of the scutellum. Thought to act as a secretory and absorptive organ.
More Synonyms: epitelio escutelar (Spanish), 胚盤上皮細胞 (Japanese), portion of scutellar epithelium, scutellum epithelium
Comments:
scutellar node [
PO:0004708; plant anatomy term ]
A stem node that is the part of an embryo axis directly above the radicle where the scutellum is attached.
More Synonyms: 胚盤節 (Japanese), nodo escutelar (Spanish)
Comments: Found in grasses where no hypocotyl is present. The scutellar node may represent a reduction of the hypocotyl and cotyledonary node.
scutellar vascular system [
PO:0008047; plant anatomy term ]
A vascular system in a scutellum.
More Synonyms: 胚盤維管系 (Japanese), scutellum vascular system, sistema vascular de escutelo (Spanish)
Comments:
scutellum [
PO:0020110; plant anatomy term ]
An embryonic plant structure that is a more or less shield-shaped and absorptive portion of a plant embryo of Poaceae.
More Synonyms: escutelo (Spanish), 胚盤 (Japanese), haustorial cotyledon
Comments: May be a modified cotyledon.
scutellum epidermis [
PO:0006049; plant anatomy term ]
A portion of shoot epidermis that is part of the scutellum.
More Synonyms: epidermis del escutelo (Spanish), 胚盤表皮 (Japanese)
Comments:
second order inflorescence [
PO:0025240; plant anatomy term ]
A reproductive shoot system (PO:0025082) that is part of an inflorescence (PO:0009049) and has as parts a second order inflorescence axis (PO:0006321) and any shoot axes (PO:0025029) and flowers (PO:0009046) that arise from it.
More Synonyms: 第二花序 (Japanese), inflorescencia de segundo orden (Spanish), secondary inflorescence
Comments: This a sub-inflorescence that arises from the main inflorescence axis.
second order inflorescence branch [
PO:0006322; plant anatomy term ]
An inflorescence branch (PO:0009081) arising from a primary inflorescence branch (PO:0006321).
More Synonyms: 第二花序分枝 (Japanese), rama de segundo orden de la inflorescencia (Spanish), second order paraclade, secondary inflorescence branch, third order inflorescence axis
Comments:
second order infructescence [
PO:0025241; plant anatomy term ]
A reproductive shoot system that is part of an infructescence and has as parts a second order infructescence axis and any infructescence axes and fruits that arise from it.
More Synonyms: 第二果序 (Japanese), hand of bananas, hand of fruit, infructescencia de segundo orden (Spanish), secondary infructescence
Comments:
second order infructescence branch [
PO:0025113; plant anatomy term ]
An infructescence branch (PO:0025243) arising from a primary infructescence branch (PO:0025112).
More Synonyms: 第二果序分枝 (Japanese), ramificacion de segundo orden de la infructescencia (Spanish), secondary infructescence branch
Comments:
secondary leaf vein [
PO:0020140; plant anatomy term ]
A leaf lamina vein (PO:0020138) arising from a primary leaf vein (PO:0025413).
More Synonyms: cross-vein, veinlet, vena secundaria (Spanish), 二次葉脈 (Japanese)
Comments: Vein orders only apply to hierarchically branching vein patterns, not to dichotomously branching vein patterns, as found in some ferns and gymnosperms.
secondary phloem [
PO:0005043; plant anatomy term ]
A portion of phloem (PO:0005417) tissue that develops from a vascular cambium (PO:0005598).
More Synonyms: floema secundario (Spanish), portion of secondary phloem tissue, 二次師部 (Japanese)
Comments: Secondary phloem develops as part of secondary growth (GO:0080117).
secondary phloem sieve cell [
PO:0025456; plant anatomy term ]
A sieve cell (PO:0025415) that is part of a portion of secondary phloem (PO:0005043).
More Synonyms: célula cribosa del floema secundario (Spanish), 二次師部(師管部)篩細胞 (Japanese)
Comments:
secondary phloem sieve element [
PO:0025453; plant anatomy term ]
A sieve element (PO:0025406) that is part of a portion of secondary phloem (PO:0005043).
More Synonyms: elemento criboso del floema secundario (Spanish), 二次師部(師管部) 篩要素 (Japanese)
Comments:
secondary phloem sieve tube element [
PO:0025457; plant anatomy term ]
A sieve tube element (PO:0000289) that is part of a portion of secondary phloem (PO:0005043).
More Synonyms: elemento de tubo criboso del floema secundario (Spanish), secondary phloem sieve tube member, secondary phloem sieve-tube element, 二次師部(師管部) 篩管要素 (Japanese)
Comments:
secondary thickening meristem [
PO:0025414; plant anatomy term ]
A lateral meristem (PO:0020145) that is not contiguous with an apical meristem (PO:0020144) and has a parts multiple layers of meristematic cells (PO:0004010).
More Synonyms: meristema de engrosamiento secundario (Spanish), STM, 二次 肥厚分裂組織 (Japanese)
Comments: Contributes mainly to formation of the body of a stem (PO:0009047), but may also produce adventitious (shoot-borne) roots (PO:0000042) and may also be found in the roots (PO:0009005) of some species. May be continuous or discontinuous with the primary thickening meristem (PO:0005039). Found in some monocot species of the Liliales and Asperigales.
secondary vascular tissue [
PO:0025409; plant anatomy term ]
A portion of vascular tissue (PO:0009015) that develops from a vascular cambium (PO:0005598).
More Synonyms: tejido vascular secundario (Spanish), 二次維管組織 (Japanese)
Comments: Forms as part of secondary growth (GO:0080117) in vascular plants. Often differentiated into the axial system (PO:0025410) and ray system (PO:0025411).
secondary xylem [
PO:0005848; plant anatomy term ]
A portion of xylem (PO:0005352) tissue that develops from a vascular cambium (PO:0005598).
More Synonyms: portion of secondary xylem tissue, wood, xilema secundario (Spanish), 二次木部 (Japanese)
Comments: Secondary xylem develops as part of secondary growth (GO:0080117). Secondary xylem is the wood of gymnosperm and dicot angiosperm trees, shrubs, and lianas. May be organized into axial (PO:0025410) and ray (PO:0025411) systems. Secondary xylem is often part of a shoot axis (PO:0025029) or a root (PO:0009005) but may occur in other organs. Some monocots have a primary thickening meristem (PO:0005039), located near the shoot apical meristem (PO:0020148), that gives the appearance of secondary growth and may produce lignified tissue that appears woody but is not composed of secondary xylem. Tracheary elements in secondary xylem (PO:0000290) have lignified cell walls with secondary thickening and are dead at maturity.
secondary xylem parenchyma [
PO:0004532; plant anatomy term ]
A portion of parenchyma (PO:0005421) tissue that is part of a portion of secondary xylem (PO:0005848) and has as parts secondary xylem parenchyma cells (PO:0004525).
More Synonyms: parénquima de la madera (Spanish), wood parenchyma, 二次木部柔組織 (Japanese)
Comments:
secondary xylem parenchyma cell [
PO:0004525; plant anatomy term ]
A parenchyma cell (PO:0000074) that is part of a portion of secondary xylem parenchyma (PO:0004532).
More Synonyms: célula parenquimática de la madera (Spanish), wood parenchyma cell, 二次木部柔組織細胞 (Japanese)
Comments:
secondary xylem tracheary element [
PO:0025445; plant anatomy term ]
A tracheary element (PO:0000290) that is part of a portion of secondary xylem tissue (PO:0005848).
More Synonyms: elemento de tráquea del xilema secundario (Spanish), 二次木質部仮導管要素 (Japanese)
Comments:
secondary xylem tracheid [
PO:0025447; plant anatomy term ]
A tracheid PO:0000301 that is part of a portion of secondary xylem tissue (PO:0005848).
More Synonyms: traqueida del xilema secundario (Spanish), 二次木質部仮導管 (Japanese)
Comments:
secondary xylem vessel [
PO:0025451; plant anatomy term ]
A xylem vessel (PO:0025417) that is part of a portion of secondary xylem tissue (PO:0005848).
More Synonyms: vaso del xilema secundario (Spanish), 二次木質部導管 (Japanese)
Comments:
secondary xylem vessel member [
PO:0025449; plant anatomy term ]
A xylem vessel member (PO:0002003) that is part of a portion of secondary xylem tissue (PO:0005848).
More Synonyms: elemento vaso del xilema secundario (Spanish), 二次木質部導管要素 (Japanese)
Comments:
seed [
PO:0009010; plant anatomy term ]
A multi-tissue plant structure (PO:0025496) that develops from a plant ovule (PO:0020003) and has as parts a plant embryo (PO:0009009) enclosed in a seed coat (PO:0009088).
More Synonyms: 種子 (Japanese), diaspore, pyrene, semilla (Spanish)
Comments: A seed generally develops from an ovule (PO:0020003) after fertilization, but may develop without fertilization in the case of apogamy (e.g., adventitious embryos or somatic embryos). A seed is a reproductive unit of seed plants (gymnosperms, angiosperms, and fossil pteridosperms).
seed chalaza [
PO:0006333; plant anatomy term ]
A remnant of the ovular chalaza that is part of the seed.
More Synonyms: calaza de la semilla (Spanish), 種子 カラザ (Japanese), portion of seed chalaza
Comments:
seed coat [
PO:0009088; plant anatomy term ]
A portion of plant tissue that is the covering of a seed derived from ovular - mainly integumentary - tissue.
More Synonyms: cubierta de la semilla (Spanish), 種子種皮 (Japanese), portion of seed coat tissue
Comments: Used only when not specified more precisely; see testa, tegmen.
seed coat epidermis [
PO:0006048; plant anatomy term ]
A portion of epidermis that is part of a seed coat.
More Synonyms: 種子種皮表皮 (Japanese), epidermis de la cubierta de la semilla (Spanish)
Comments:
seed funicle [
PO:0006332; plant anatomy term ]
A cardinal part of multi-tissue plant structure (PO:0025498) that is attached to a seed (PO:0009010) and is the remnants of a funicle (PO:0020006).
More Synonyms: 種子種柄 (Japanese), funículo de la semilla (Spanish)
Comments:
seed micropyle [
PO:0006334; plant anatomy term ]
A plant anatomical space that is enclosed by and forms an opening in a seed coat at the apex of a seed and is the remnant of a micropyle.
More Synonyms: 種子珠孔 (Japanese), micrópila de la semilla (Spanish)
Comments:
seed obturator [
PO:0006336; plant anatomy term ]
An outgrowth of the seed funicle, that forms a bridge between the seed micropyle and other tissues. It is also a remnant form of the obturator found in the ovular funicle.
More Synonyms: 種子閉塞組織 (Japanese), obturador de la semilla (Spanish), portion of seed obturator tissue
Comments:
seed operculum [
PO:0019024; plant anatomy term ]
A plug-like structure formed in the micropylar region of the seed coat.
More Synonyms: 種子蘚蓋 (Japanese), opérculo de la semilla (Spanish), portion of seed operculum tissue, seed lid, seed opercula
Comments:
seed raphe [
PO:0006331; plant anatomy term ]
A cardinal part of multi-tissue plant structure (PO:0025498) that is a ridge on a seed (PO:0009010) that develops from a raphe (PO:0020027).
More Synonyms: 種子背線、縫線 (Japanese), rafe de la semilla (Spanish)
Comments:
seed storage parenchyma [
PO:0025067; plant anatomy term ]
A portion of storage parenchyma that is part of a seed.
More Synonyms: 種子貯蔵柔組織 (Japanese), parénquima de reserva de la semilla (Spanish)
Comments:
seed trichome [
PO:0004511; plant anatomy term ]
A trichome that develops from seed coat epidermis.
More Synonyms: 種子毛(毛茸、糸状体、毛状突起体) (Japanese), pubescence, seed hair, tricoma de la semilla (Spanish)
Comments:
seedling coleoptile [
PO:0025287; plant anatomy term ]
A coleoptile (PO:0020033) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
More Synonyms: coleóptile de la plántula (Spanish), 実生幼葉鞘 (Japanese)
Comments: A seedling coleoptile develops from an embryo coleoptile (PO:0025286).
seedling coleorhiza [
PO:0025289; plant anatomy term ]
A coleorhiza (PO:0020034) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
More Synonyms: coleorriza de la plántula (Spanish), 実生根鞘 (Japanese)
Comments: Develops from an embryo coleorhiza (PO:0025288).
seedling cotyledon [
PO:0025471; plant anatomy term ]
A cotyledon (PO:0020030) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
More Synonyms:
Comments: Develops from an embryo cotyledon (PO:0025470).
seedling epicotyl [
PO:0025293; plant anatomy term ]
An epicotyl (PO:0020035) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
More Synonyms: epicótile de la plántula (Spanish), 実生上胚軸 (Japanese)
Comments: Develops from an embryo epicotyl (PO:0025292).
seedling hypocotyl [
PO:0025291; plant anatomy term ]
A hypocotyl (PO:0020100) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
More Synonyms: hipocótile de la plántula (Spanish), 実生胚軸 (Japanese)
Comments: Develops from an embryo hypocotyl (PO:0025290). This term should only be used for seed plants.
seedling hypocotyl-root junction [
PO:0025301; plant anatomy term ]
A hypocotyl-root junction (PO:0004724) that develops from an embryo hypocotyl-root junction (PO:0025300) .
More Synonyms: conjunción del hipocótile-raíz en la plántula (Spanish), 実生胚軸-根合流点 (Japanese)
Comments: Part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
seedling mesocotyl [
PO:0025295; plant anatomy term ]
A mesocotyl (PO:0020037) that develops from an embryo mesocotyl (PO:0025294).
More Synonyms: mesocótile de la plantual (Spanish), 実生中胚軸 (Japanese)
Comments: A seedling mesocotyl is an elongation of an embryo mesocotyl (PO:0025294) and is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
seedling radicle [
PO:0025297; plant anatomy term ]
A radicle (PO:0020031) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
More Synonyms: radícula de la plántula (Spanish), 実生幼根 (Japanese)
Comments: Develops from an embryo radicle (PO:0025296). May develop into the root system (PO:0025025) of an adult plant. Sometimes is abortive.
seminal root [
PO:0000046; plant anatomy term ]
An embryo root (PO:0000045) formed within the scutellar node (PO:0004708) of the plant embryo (PO:0009009) in some monocotyledonous plants.
More Synonyms: 種子根 (Japanese), lateral seminal root, raíz seminal (Spanish), scutellar nodal root, secondary root
Comments:
sepal [
PO:0009031; plant anatomy term ]
A phyllome (PO:0006001) that is usually green, and is part of the calyx (PO:0009060).
More Synonyms: がく片 (Japanese), sépalo (Spanish)
Comments: In some species the sepals (PO:0009031) may not be green for example many members of the Liliaceae family.
sepal abaxial epidermis [
PO:0006054; plant anatomy term ]
A portion of sepal epidermis that covers the abaxial/lower surface of a sepal.
More Synonyms: がく片背軸側 表皮 (Japanese), epidermis abaxial del sépalo (Spanish)
Comments:
sepal adaxial epidermis [
PO:0006055; plant anatomy term ]
A portion of sepal epidermis that covers the adaxial/upper surface of a sepal.
More Synonyms: がく片向軸側 表皮 (Japanese), epidermis adaxial del sépalo (Spanish)
Comments:
sepal anlagen [
PO:0025485; plant anatomy term ]
A phyllome anlagen (PO:0025430) that will give rise to a sepal primordium (PO:0004704) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
More Synonyms: anlagen del sépalo (Spanish), がく片原基 (Japanese)
Comments:
sepal apex [
PO:0025145; plant anatomy term ]
A phyllome apex that is part of a sepal.
More Synonyms: ápice del sépalo (Spanish), がく片頂端 (Japanese)
Comments: It is not precisely defined how far toward the base from the tip a sepal apex extends. For the apical most portion of a sepal, use the term sepal tip.
sepal base [
PO:0025147; plant anatomy term ]
A phyllome base that is part of a sepal.
More Synonyms: がく片基部 (Japanese), base del sépalo (Spanish)
Comments:
sepal epidermis [
PO:0006040; plant anatomy term ]
A portion of phyllome epidermis that is part of a sepal.
More Synonyms: がく片表皮 (Japanese), epidermis del sépalo (Spanish)
Comments:
sepal epidermis giant cell [
PO:0025499; plant anatomy term ]
An epidermal pavement cell (PO:0000332) that is part of sepal epidermis (PO:0006040) and is approximately one fifth the length of a sepal.
More Synonyms: がく片表皮巨大細胞 (Japanese), giant cell
Comments: Compare to other epidermal pavement cells that are approximately one hundredth of the length of a sepal (PO:0009031). In Arabidopsis, sepal giant epidermal cells arise by DNA endoreplication (GO:0042023) and have high DNA content (up to 16C).
sepal margin [
PO:0005021; plant anatomy term ]
The margin of a sepal.
More Synonyms: がく片縁 (Japanese), margen del sépalo (Spanish)
Comments:
sepal mesophyll [
PO:0006072; plant anatomy term ]
The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the sepal.
More Synonyms: がく片葉肉 (Japanese), mesófilo del sépalo (Spanish)
Comments:
sepal parenchyma [
PO:0006068; plant anatomy term ]
A portion of parenchyma tissue that is part of a sepal.
More Synonyms: がく片柔組織 (Japanese), parénquima del sépalo (Spanish)
Comments:
sepal primordium [
PO:0004704; plant anatomy term ]
A phyllome primordium (PO:0025128) that develops from a sepal anlagen (PO:0025485) and is committed to the development of a sepal (PO:0009031).
More Synonyms: がく片原基(可視的) (Japanese), portion of sepal primordium tissue, primordio de sépalo (Spanish), sepal primordia
Comments:
sepal stomatal complex [
PO:0025219; plant anatomy term ]
A phyllome stomatal complex that is part of a sepal.
More Synonyms: がく片気孔装置 (Japanese), complejo estomático del sépalo (Spanish), sepal epidermal stomatal complex, sepal epidermis stomatal complex
Comments:
sepal tip [
PO:0025150; plant anatomy term ]
A phyllome tip that is part of a sepal apex.
More Synonyms: がく片先端 (Japanese), punta del sépalo (Spanish)
Comments: This term is to be used for only the apical most portion of a sepal. For a larger area, use the term sepal apex. Use this term when describing the shape of a sepal tip.
sepal trichome [
PO:0025182; plant anatomy term ]
A phyllome trichome that is part of a sepal epidermis.
More Synonyms: がく片毛(毛茸、糸状体) (Japanese), tricoma de la epidermis del sépalo (Spanish)
Comments:
sepal vascular system [
PO:0004723; plant anatomy term ]
A phyllome vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a sepal.
More Synonyms: がく片維管系 (Japanese), sistema vascular del sépalo (Spanish)
Comments:
separation layer [
PO:0006211; plant anatomy term ]
A portion of plant tissue (PO:0009007) that is part of an abscission zone (PO:0000146) and contains cells that develop an abnormal wall chemistry and swelling resulting in their easily being pulled apart along the pectin-rich middle lamella (GO:0009519).
More Synonyms: capa de separación (Spanish), 隔離層 (Japanese)
Comments: Directly involved in the weakening process of abscission.
septate fiber cell [
PO:0004521; plant anatomy term ]
A plant fiber cell (PO:0025407) with thin transverse walls (septa), which are formed when mitosis occurs within the cell after development of a secondary cell wall (GO:0009531).
More Synonyms: 隔壁繊維細胞 (Japanese), fibra septada (Spanish), septate fiber
Comments: A septate fiber septum is composed of the adjacent primary cell walls of two internal cells that arise from mitosis within the septate fiber cell after it has formed a secondary cell wall (GO:0009531).
septate fiber tracheid [
PO:0025419; plant anatomy term ]
A fiber tracheid (PO:0000355) that has as parts one or more thin internal partitions or septa.
More Synonyms: 隔壁繊維仮導管 (Japanese), fibro-traqueida septada (Spanish)
Comments: A septate fiber tracheid septum is composed of the adjacent primary cell walls of two internal cells that arise from mitosis within the septate fiber tracheid after it has formed a secondary cell wall (GO:0009531).
septate libriform fiber cell [
PO:0025420; plant anatomy term ]
A libriform fiber cell (PO:0004520) that has as parts one or more thin internal partitions or septa.
More Synonyms: 隔壁靭皮繊維細胞 (Japanese), fibra libriforme septada (Spanish)
Comments: A septate libriform fiber cell septum is composed of the adjacent primary cell walls of two internal cells that arise from mitosis within the septate libriform fiber cell after it has formed a secondary cell wall (GO:0009531).
septate phloem fiber cell [
PO:0025421; plant anatomy term ]
A phloem fiber cell (PO:0004519) that has as parts one or more thin internal partitions or septa.
More Synonyms: 隔壁師部 fiber cell (Japanese), fibra del floema septada (Spanish)
Comments: A septatephloem fiber cell septum is composed of the adjacent primary cell walls of two internal cells that arise from mitosis within the septate phloem fiber cell after it has formed a secondary cell wall (GO:0009531).
septum [
PO:0000030; plant anatomy term ]
A collective organ part structure composed of two or more layers of various tissues that is a partition that divides a cavity formed by the fusion of two or more organs.
More Synonyms: dissepiment, 隔壁 (Japanese), septa, septo (Spanish)
Comments: A septum is formed by the fusion of the walls of two adjacent organs (ovary walls or anther walls), for example, the partition between two sections of an orange, seen in cross-section.
seta [
PO:0030032; plant anatomy term ]
A stalk (PO:0025066) that supports a spore capsule, the sporangium (PO:0025094).
More Synonyms: とげ、剛毛、コケの柄 (Japanese), seta (Spanish), setae
Comments: Found in some bryophytes, especially mosses and liverworts.
seta meristematic apical cell [
PO:0030016; plant anatomy term ]
A shoot axis meristematic apical cell at the tip of a seta.
More Synonyms: célula apical de la seta (Spanish), seta apical cell, seta apical initial, 柄分裂組織の頂端細胞 (Japanese)
Comments: Ceases being an apical cell when the sporangium begins to develop.
seventh order inflorescence branch [
PO:0025109; plant anatomy term ]
An inflorescence branch (PO:0009081) arising from a sixth order inflorescence branch (PO:0025108).
More Synonyms: 第七花序分枝 (Japanese), eighth order inflorescence axis, rama de séptimo orden de la inflorescencia (Spanish)
Comments:
seventh order infructescence branch [
PO:0025253; plant anatomy term ]
An infructescence branch (PO:0025243) arising from a sixth order infructescence branch (PO:0025252).
More Synonyms: 第七果序分枝 (Japanese), ramificacion de séptimo orden de la infructescencia (Spanish)
Comments:
sheath cell [
PO:0004531; plant anatomy term ]
Cell on the margin of, and tending to form a sheath around, the procumbent cells of a multi-seriate ray as seen in tangential section.
More Synonyms: célula de la vaina (Spanish), 鞘細胞 (Japanese)
Comments:
shoot apex [
PO:0000037; plant anatomy term ]
A shoot axis (PO:0025029) that is the most distal part of a shoot system (PO:0009006) and has as parts a shoot apical meristem (PO:0020148) and the youngest primordia (PO:0025127).
More Synonyms: ápice del epiblasto (epiblastema) (Spanish), シュート頂、茎頂 (Japanese)
Comments:
shoot apical meristem [
PO:0020148; plant anatomy term ]
A shoot system meristem (PO:0006079) formed at the apex of the shoot axis (PO:0025029), including those originating from an axillary bud meristem (PO:0000232).
More Synonyms: 茎頂分裂組織 (Japanese), meristema apical del epiblasto (epiblastema) (Spanish), primary shoot meristem, promeristem, SAM
Comments:
shoot axis [
PO:0025029; plant anatomy term ]
A plant axis (PO:0025004) that is part of a shoot system (PO:0009006).
More Synonyms: シュート軸 (Japanese), caullome, eje del epiblasto (epiblastema) (Spanish), shoot
Comments: Often bears leaves and branches. In vascular plants, has at least one node and one internode.
shoot axis cambial zone [
PO:0025440; plant anatomy term ]
A cambial zone that is part of a shoot axis (PO:0025029).
More Synonyms: シュート軸形成層 (Japanese), zona cambial del eje del epiblasto (Spanish)
Comments: Includes a cambium (PO:0005597) and adjacent cells. This term is used when the borders of the cambium are not clear.
shoot axis cork cambium [
PO:0025435; plant anatomy term ]
A cork cambium (PO:0005599) that is part of a shoot axis (PO:0025029).
More Synonyms: シュート軸コルク形成層 (Japanese), cambium suberígeno del ápice del epiblasto (Spanish)
Comments:
shoot axis cortex [
PO:0000223; plant anatomy term ]
A portion of cortex (PO:0005708) that is part of a shoot axis (PO:0025029).
More Synonyms: シュート軸皮層 (Japanese), branch cortex, cortex del eje del epiblasto (epiblastema) del tallo (Spanish), portion of shoot axis cortex tissue
Comments: Can occur in a stem or branch.
shoot axis endodermis [
PO:0005058; plant anatomy term ]
A portion of endodermis (PO:0000252) that is part of a shoot axis cortex (PO:0000223).
More Synonyms: シュート軸内胚葉 (Japanese), branch endodermis, endodermis de eje del epiblasto (epiblastema) (Spanish), stem endodermis
Comments: Can occur in a stem or branch.
shoot axis epidermis [
PO:0000112; plant anatomy term ]
A portion of shoot system epidermis (PO:0006035) that is part of a shoot axis (PO:0025029).
More Synonyms: シュート軸表皮 (Japanese), branch epidermis, epidermis del eje del tallo (Spanish)
Comments: Can occur on a stem or branch.
shoot axis hypodermis [
PO:0005057; plant anatomy term ]
A portion of shoot axis hypodermis (PO:0005057) that is part of a stem cortex (PO:0000223).
More Synonyms: シュート軸真皮 (Japanese), branch hypodermis, hipodermis del eje del epiblasto (epiblastema) (Spanish)
Comments: Can occur in a stem or branch.
shoot axis internode [
PO:0005005; plant anatomy term ]
A cardinal organ part (PO:0025001) of a shoot axis (PO:0025029) that is between two shoot axis nodes (PO:0005004).
More Synonyms: シュート節間 (Japanese), internodo del epiblasto (epiblastema) (Spanish)
Comments:
shoot axis meristematic apical cell [
PO:0030010; plant anatomy term ]
A shoot meristematic apical cell that is part of a shoot apex.
More Synonyms: シュート軸分裂組織の頂端細胞 (Japanese), célula apical del eje del epiblasto (Spanish), shoot axis apical cell, shoot axis apical initial
Comments: Divides to produces leaf initial cells (if leaves are present) and other stem or branch tissues.
shoot axis node [
PO:0005004; plant anatomy term ]
A cardinal organ part (PO:0025001) of a shoot axis (PO:0025029) where a bud (PO:0000055) may form and develop into a branch (PO:0025073), leaf (PO:0025034), flower (PO:0004541), inflorescence (PO:0009049) or nodal root (PO:0003005).
More Synonyms: シュート 節 (Japanese), nodo del epiblasto (epiblastema) (Spanish)
Comments:
shoot axis periderm [
PO:0005048; plant anatomy term ]
A portion of periderm that is part of a shoot axis.
More Synonyms: シュート軸周皮 (Japanese), branch periderm, peridermis del eje del epiblasto (epiblastema) (Spanish), stem periderm
Comments: Can occur on a stem or branch.
shoot axis perimedullary zone [
PO:0025064; plant anatomy term ]
A perimedullary zone (PO:0025058) that is part of a shoot axis pith (PO:0005041).
More Synonyms: シュート軸髄冠 (Japanese), branch perimedullary zone, stem perimedullary zone, zona perimedular de eje del epiblasto (epiblastema) (Spanish)
Comments: Can occur in a stem or branch.
shoot axis pith [
PO:0005041; plant anatomy term ]
A portion of pith (PO:0006109) that is part of a shoot axis (PO:0025029).
More Synonyms: シュート軸髄 (Japanese), branch pith, médula del eje del epiblasto (epiblastema) (Spanish), stem pith
Comments: Can occur in a stem or branch.
shoot axis prickle [
PO:0025171; plant anatomy term ]
A prickle that is part of a shoot axis.
More Synonyms: シュート軸表皮のとげ (Japanese), espinilla del eje del epiblasto (epiblastema) (Spanish)
Comments:
shoot axis procambium [
PO:0025260; plant anatomy term ]
A portion of shoot procambium that is part of a shoot apical meristem and gives rise to the primary vascular tissue of a shoot axis.
More Synonyms: シュート軸前形成層 (Japanese), procambio del eje del epiblasto (Spanish)
Comments:
shoot axis stele [
PO:0025198; plant anatomy term ]
A stele that is part of a shoot axis.
More Synonyms: シュート軸中心柱 (Japanese), estela del eje del epiblasto (epiblastema) (Spanish)
Comments:
shoot axis tegument layer [
PO:0025609; plant anatomy term ]
A portion of plant tissue (PO:0009007) that forms a tough, protective outer layer on a shoot axis and includes as parts a shoot axis hypodermis (PO:0005057) and a shoot axis epidermis (PO:0000112).
More Synonyms: shoot axis rind
Comments:
shoot axis trichome [
PO:0005003; plant anatomy term ]
A trichome that is part of a shoot axis epidermis.
More Synonyms: シュート軸毛(毛茸、糸状体) (Japanese), branch trichome, eje de tricoma del epiblasto (epiblastema) (Spanish), stem trichome
Comments: Can occur on a stem or branch.
shoot axis tuber [
PO:0004543; plant anatomy term ]
A tuber (PO:0025522) that develops from a branch (PO:0025073).
More Synonyms: シュート軸塊茎 (Japanese), diaspore, shoot axis branch tuber, tubérculo (Spanish), tuber branch
Comments: Functions in storage of photosynthate metabolites. This term should be used for tubers derived from branches, as found in Solanum spp. (e.g. potato) or Dioscorea spp. (e.g. yam) and other species. Use the term tuberous root tuber (PO:0025476) for tubers derived from roots, such as those found in Cassava, Ipomoea, or Hemerocallis.
shoot axis tuber axillary bud meristem [
PO:0025068; plant anatomy term ]
An axillary bud meristem (PO:0000232) that is part of a shoot axis tuber (PO:0004543).
More Synonyms: meristema axilar de yema de tubérculo (Spanish), 塊茎腋芽 分裂組織 (Japanese)
Comments: As the bud grows, the meristem switches from being an axillary meristem to being a shoot apical meristem.
shoot axis tuber axillary vegetative bud [
PO:0025040; plant anatomy term ]
An axillary vegetative bud (PO:0004712) that is part of a shoot axis tuber (PO:0004543).
More Synonyms: tuber bud, tuber eye, yema vegetativa axilar de tubérculo (Spanish), 塊茎腋栄養芽 (Japanese)
Comments:
shoot axis tuber epidermis [
PO:0025046; plant anatomy term ]
A portion of shoot axis epidermis (PO:0000112) that is part of a shoot axis tuber (PO:0004543).
More Synonyms: epidermis de tubérculo (Spanish), 塊茎 表皮 (Japanese)
Comments:
shoot axis tuber periderm [
PO:0025043; plant anatomy term ]
A portion of shoot axis periderm (PO:0005048) that is part of a shoot axis tuber (PO:0004543).
More Synonyms: peridermis de tubérculo (Spanish), 塊茎周皮 (Japanese)
Comments:
shoot axis vascular cambium [
PO:0025437; plant anatomy term ]
A vascular cambium (PO:0005598) that is part of a shoot axis (PO:0025029).
More Synonyms: シュート軸維管束形成層 (Japanese), cambium vascular del eje del epiblasto (Spanish)
Comments:
shoot axis vascular system [
PO:0000039; plant anatomy term ]
A vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a shoot axis.
More Synonyms: シュート軸維管系 (Japanese), branch vascular system, sistema vascular del eje del epiblasto (epiblastema) (Spanish), stem vascular system
Comments: Can occur in a stem or branch.
shoot epidermal cell [
PO:0025165; plant anatomy term ]
An epidermal cell that is part of a shoot epidermis.
More Synonyms: シュート表皮 細胞 (Japanese), célula epidérmica del epiblasto (epiblastema) (Spanish)
Comments:
shoot internode differentiation zone [
PO:0025102; plant anatomy term ]
A plant axis differentiation zone that is part of a shoot axis.
More Synonyms: シュート節間分化帯(層) (Japanese), zona de diferenciación del internodo del epiblasto (epiblastema) (Spanish)
Comments:
shoot internode elongation zone [
PO:0025100; plant anatomy term ]
A plant axis elongation zone that is part of a shoot axis internode.
More Synonyms: シュート節間伸長帯(層) (Japanese), zona de elongación del internodo de epiblasto (epiblastema) (Spanish)
Comments:
shoot lateral meristem [
PO:0006344; plant anatomy term ]
A lateral meristem (PO:0020145) that is part of a shoot axis (PO:0025029).
More Synonyms: 茎側分裂組織 (Japanese), meristema lateral del epiblasto (epiblastema) (Spanish), shoot lateral growth meristem
Comments:
shoot meristematic apical cell [
PO:0030009; plant anatomy term ]
A meristematic apical cell that is part of a shoot system.
More Synonyms: シュート分裂組織の頂端細胞 (Japanese), célula apical del epiblasto (Spanish), shoot apical cell, shoot apical initial
Comments: May occur in shoot axes or leaves of bryophytes or ferns.
shoot procambium [
PO:0025276; plant anatomy term ]
A portion of procambium (PO:0025275) tissue that is part of a shoot system (PO:0009006).
More Synonyms: シュート前形成層 (Japanese), procambio del epiblasto (Spanish)
Comments:
shoot system [
PO:0009006; plant anatomy term ]
A collective plant organ structure (PO:0025007) that produces shoot-borne portions of meristem tissue (PO:0009013) and the plant structures (PO:0009011) that arise from them.
More Synonyms: シュート系、苗条系 (Japanese), Poaceae crown, shoot, sistema de epiblasto (epiblastema) (Spanish), thalli, thallus, tree crown
Comments: The shoot system is generally used to refer to the above-ground plant parts, although some plants have parts of their shoot system underground. For example, a rhizome (PO:0004542), bulb (PO:0025356), a corm (PO:0025355) or a subterranean tuber (PO:0004547), as in Solanum tuberosum (potato) or yam, are all part of the shoot system.
shoot system epidermis [
PO:0006035; plant anatomy term ]
A portion of epidermis (PO:0005679) that is part of a shoot system (PO:0009006) and arises from the meristem L1 layer (PO:0009020).
More Synonyms: シュート表皮 (Japanese), epidermis del epiblasto (epiblastema) (Spanish)
Comments: Often interrupted by stomatal complexes (PO:0002000) and other structures. The shoot system epidermis is different from the root epidermis (PO:0006036) in its origin, function and structure.
shoot system exarch protoxylem [
PO:0025556; plant anatomy term ]
A portion of exarch protoxylem (PO:002554) tissue in which the maturation of primary xylem (PO:0005849) of the shoot system (PO:0009006) progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
More Synonyms: シュート組織外原型原生木部 (Japanese), protoxilema exarco del sistema del epiblasto (Spanish)
Comments:
shoot system ground meristem [
PO:0025595; plant anatomy term ]
A ground meristem (PO:0025594) that gives rise to a portion of ground tissue (PO:0025059) in the shoot system (PO:0009006).
More Synonyms:
Comments: The meristem L2 layer (PO:0009021) and meristem L3 layer (PO:0009021) of the are part of the shoot system ground meristem (PO:0025595).
shoot system meristem [
PO:0006079; plant anatomy term ]
A portion of meristem tissue (PO:0009013) that is part of a shoot system (PO:0009006).
More Synonyms: シュート分裂組織 (Japanese), meristema del epiblasto (epiblastema) (Spanish)
Comments:
shoot system phloem sap [
PO:0025566; plant anatomy term ]
A phloem sap (PO:0025540) that is located in the shoot system (PO:0009006).
More Synonyms: シュート組織師管液 (Japanese), savia del floema del sistema del epiblasto (Spanish)
Comments:
shoot system vascular system [
PO:0025205; plant anatomy term ]
A vascular system that is part of a shoot system.
More Synonyms: シュート系維管系 (Japanese), sistema vascular del sistema del epiblasto (epiblastema) (Spanish)
Comments:
shoot system xylem sap [
PO:0025565; plant anatomy term ]
A xylem sap (PO:0025539) that is located in the shoot system (PO:0009006).
More Synonyms: シュート組織木部樹液 (Japanese), savia del floema del epiblasto (Spanish)
Comments:
shoot-borne internode root [
PO:0025593; plant anatomy term ]
A shoot-borne root (PO:0000042) that arises from a shoot axis internode (PO:0005005).
More Synonyms: adventitious root, internode root
Comments:
shoot-borne nodal root [
PO:0003005; plant anatomy term ]
A shoot-borne root (PO:0000042) that forms at a shoot axis node (PO:0005004).
More Synonyms: adventitious nodal root, 節根 (Japanese), nodal root, PO:0003008, PO:0003009, raíz nodosa (Spanish)
Comments:
shoot-borne root [
PO:0000042; plant anatomy term ]
A root (PO:0009005) that develops from shoot axis (PO:0025029) tissue.
More Synonyms: adventitious root, aerial root, シュート細胞由来の根 (Japanese), climbing root, epiblasto (epiblastema) que se origina en la raíz (Spanish), PO:0003007, PO:0020129, stilt root
Comments:
shoot-borne root apical meristem [
PO:0006021; plant anatomy term ]
A root apical meristem (PO:0020147) that gives rise to a shoot-borne root (PO:0000042).
More Synonyms: adventitious root apical meristem, crown root meristem, meristema de la raíz adventicia (Spanish), seminal root meristem, 不定根頂端分裂組織 (Japanese)
Comments:
shoot-borne root epidermis [
PO:0006039; plant anatomy term ]
A portion of root epidermis (PO:0006036) that is part of a shoot-borne root (PO:0000042).
More Synonyms: adventitious root epidermis, crown root epidermis, epidermis de la raíz adventicia (Spanish), PO:0006038, 不定根表皮 (Japanese)
Comments:
shoot-borne root primordium [
PO:0025480; plant anatomy term ]
A root primordium (PO:0005029) that is committed to the development of a shoot-borne root (PO:0000042).
More Synonyms: adventitious root primordium, シュート細胞由来の根原基(可視的) (Japanese), portion of shoot-borne root primordium tissue, primordio del eje del epiblasto de la raíz (Spanish)
Comments: Transition from shoot-borne root primordium to shoot-borne root occurs with the formation of a root cap (PO:0020123), shortly after the development of a root apical meristem (PO:0020147).
shoot-borne shoot system [
PO:0004545; plant anatomy term ]
A shoot system that is initiated from a shoot.
More Synonyms: シュート由来苗条系 (Japanese), branch, sistema de epiblasto (epiblastema) que nace en el epiblasto (epiblastema) (Spanish), sucker, turion
Comments:
short cell [
PO:0004718; plant anatomy term ]
An isodiametric leaf pavement cell.
More Synonyms: célula corta (Spanish), 短細胞 (Japanese)
Comments: In the leaf epidermis of Poaceae and Joinvilleaceae, long cells and short cells often alternate in longitudinal rows. If you are annotating to this term, please add an additional annotation to vascular leaf (PO:0009025) or non-vascular leaf (PO:0025075), depending on the species. All annotations for angiosperms, gymnosperms, and pteridophytes should go to vascular leaf and all annotations for bryophytes should go to non-vascular leaf.
short shoot [
PO:0004701; plant anatomy term ]
Shoot system in which the internodes elongate little or at all, bearing reproductive structures and/or leaves.
More Synonyms: brachyblast, bud spur, 短枝 (Japanese), epiblasto (epiblastema) corto (Spanish), short-shoot, spur
Comments:
short tassel branch [
PO:0009102; plant anatomy term ]
The very short branch that may arise from either or both the long lateral branch and the central spike of tassel in maize.
More Synonyms: 雄穂短枝 (Japanese), ramificación corta del penacho (borla) (Spanish), third order tassel branch
Comments:
short tassel branch meristem [
PO:0009103; plant anatomy term ]
The meristem present on either or both the long lateral branch and central spike of a maize tassel that gives rise to short tassel branch.
More Synonyms: 雄穂短枝分裂組織 (Japanese), meristema de la ramificación corta del penacho (borla) (Spanish), short branch meristem, third order tassel branch meristem
Comments:
sieve cell [
PO:0025415; plant anatomy term ]
A sieve element (PO:0025406) in which the sieve areas are not aggregated into sieve plates (GO:0097218).
More Synonyms: célula cribosa (Spanish), 師(篩)細胞 (Japanese)
Comments: Sieve areas in sieve cells generally have narrow pores and thin connecting strands, and they are not highly specialized, but instead are fairly uniform throughout the cell wall. Typical of gymnosperms and non-seed vascular plants such as ferns. Differ from sieve tube elements, which have sieve plates and more pronounced specialization of sieve areas.
sieve element [
PO:0025406; plant anatomy term ]
A native plant cell (PO:0025606) that is part of a portion of phloem tissue (PO:0005417), has sieve areas in its walls, and lacks a nucleus in its mature protoplast.
More Synonyms: elemento criboso (Spanish), 師(篩)要素 (Japanese)
Comments: Sieve elements function mainly in longitudinal conduction of organic solutes. Classified into sieve cells (PO:0025415) and sieve tube elements (PO:0000289) based on the presence of sieve plates and specialization of sieve areas in different parts of the cell. Develops from either a cambial initial (PO:0000295), a phloem mother cell (PO:0000400), or a cell of the procambium (PO:0025275).
sieve tube [
PO:0025416; plant anatomy term ]
A portion of phloem tissue (PO:0005417) that has as parts a series of sieve tube elements (PO:0000289) arranged end to end and interconnected through sieve plates.
More Synonyms: tubo criboso (Spanish), 師(篩)管 (Japanese)
Comments: A sieve plate is part of a sieve tube member.
sieve tube element [
PO:0000289; plant anatomy term ]
A sieve element (PO:0025406) that is part of a sieve tube (PO:0025416) and has as parts sieve areas aggregated into sieve plates (GO:0097218).
More Synonyms: miembro del tubo criboso (Spanish), PO:0000286, sieve tube member, sieve tube segment, sieve-tube element, 師(篩)管要素 (Japanese)
Comments: Sieve tube elements have sieve areas that are specialized into those with wide pores in sieve plates and those with narrow pores in lateral sieve areas. Sieve tube elements may have inclined end walls with compound or simple sieve plates. Typical of angiosperms. Differ from sieve cells (PO:0025415), which have less pronounced specialization of sieve areas and no sieve plates.
silica cell [
PO:0004009; plant anatomy term ]
Cells with deposits of silica in them. One of the two types of short cells in the epidermis of grasses and bamboos. It is usually paired with epidermal cork cell.
More Synonyms: ケイ酸細胞、珪酸細胞 (Japanese), célula silícica (Spanish)
Comments: One of two types of short cells in the epidermis of grasses. If you are annotating to this term, please add an additional annotation to vascular leaf (PO:0009025).
silk scar [
PO:0002004; plant anatomy term ]
The silk scar is composed of the shrivelled remains of the intercalary region of the silk, together with the base of the silk which is the true stylar tissue of the silk arising from the distal end of the developing kernel (caryopsis).
More Synonyms: シルクの痕跡 (Japanese), cicatriz sedosa (Spanish)
Comments:
simple leaf [
PO:0020042; plant anatomy term ]
A leaf in which the lamina is undivided.
More Synonyms: hoja simple (Spanish), 単葉 (Japanese)
Comments:
sixth order inflorescence branch [
PO:0025108; plant anatomy term ]
An inflorescence branch (PO:0009081) arising from a fifth order inflorescence branch (PO:0025107).
More Synonyms: 第六花序分枝 (Japanese), rama de sexto orden de la inflorescencia (Spanish), seventh order inflorescence axis
Comments:
sixth order infructescence branch [
PO:0025252; plant anatomy term ]
An infructescence branch (PO:0025243) arising from a fifth order infructescence branch (PO:0025116).
More Synonyms: 第六果序分枝 (Japanese), ramificacion de sexto orden de la infructescencia (Spanish)
Comments:
socket cell [
PO:0000115; plant anatomy term ]
A shoot epidermal cell (PO:0025165) that surrounds a trichome (PO:0000282) and provides its support.
More Synonyms: ソケット細胞 (Japanese), célula de encaje (Spanish), cell located at the base of the trichome, trichome support cell
Comments:
somatic plant embryo [
PO:0025302; plant anatomy term ]
A plant embryo (PO:0009009) that arises from previously differentiated somatic cells, rather than from fused gametes, i.e. the plant zygote (PO:0000423).
More Synonyms: apomictic plant embryo, embrión somático vegetal (Spanish), somatic embryo, 体細胞plant胚 (Japanese)
Comments: Somatic plant embryos may arise where embryos normally would not arise as a product of apomixis. They may occur on the edges of leaves on some species of Kalanchoe or some ferns.
sorus [
PO:0025359; plant anatomy term ]
A collective plant organ structure (PO:0025007) on the surface of a vascular leaf (PO:0009025) that has as part a cluster of two or more adjacent sporangia PO:0025094).
More Synonyms: 生殖器群、造精器群、胞子嚢群 (Japanese), sori
Comments:
spermatogenous cell [
PO:0025525; plant anatomy term ]
A native plant cell (PO:0025606) that gives rise to one or more plant sperm cells (PO:0000084).
More Synonyms:
Comments: In liverworts, hornworts and mosses the spermatogenous cell gives rise to a single, biflagellated, antheridium sperm cell (PO:0025120). In angiosperms please use the generative cell (PO:0020097) and in gymnosperms use the body cell (PO:0025526).
spikelet [
PO:0009051; plant anatomy term ]
A reproductive shoot system (PO:0025082) that is the ultimate and congested inflorescence branch (PO:0009081) of the grasses.
More Synonyms: espiguilla (Spanish), 小穂 (Japanese)
Comments: It consists of one to many closely-packed flowers and associated glumes etc.
spikelet floret [
PO:0009082; plant anatomy term ]
A small flower (PO:0009046) that is part of a spikelet (PO:0009051).
More Synonyms: florete de la espiguilla (Spanish), grass floret, PO:0006318, PO:0025090, Poaceae floret, spikelet flower, 小穂小花 (Japanese)
Comments: A spikelet floret (PO:0009082) is enclosed by one or both the flower bracts (PO:0009034); lemma (PO:0009037) and palea (PO:0009038) and also includes a lodicule (PO:0009036). To describe a floret of the Asteraceae, use ray flower (PO:0025331) or disk flower (PO:0025332). Found in Poaceae, Cyperaceae and other Poales.
spikelet meristem [
PO:0006327; plant anatomy term ]
An inflorescence apical meristem that gives rise to the two or more florets of a grass inflorescence.
More Synonyms: meristema de la espiguilla (Spanish), 小穂分裂組織 (Japanese)
Comments:
spikelet pair meristem [
PO:0006328; plant anatomy term ]
The meristem that produces two spikelet meristems, each of which produces two floral meristems.
More Synonyms: par de meristemas de la espiguilla (Spanish), 小穂対分裂組織 (Japanese)
Comments: Found in some grass inflorescences.
spikelet pedicel [
PO:0006319; plant anatomy term ]
Inflorescence branch that terminates in a spikelet.
More Synonyms: pedicelo de la espiguilla (Spanish), 小穂小花柄 (Japanese)
Comments: This is not a pedicel in the strict sense, but is the ultimate naked part of the inflorescence axis.
spikelet rachilla [
PO:0009080; plant anatomy term ]
The axis of the spikelet, above the glumes.
More Synonyms: raquilla de la espiguilla (Spanish), spikelet rhachilla, 小穂小軸 (Japanese)
Comments:
spine leaf [
PO:0025173; plant anatomy term ]
A leaf that is a sclerified and pointed and lacks a lamina.
More Synonyms: barb, barbel, barbella, barbellae, barbellula, barbellulae, barbellule, espina de hoja (Spanish), 葉針(spine leaf?) (Japanese), leaf spine
Comments: See also stipule spine (PO:0025174).
spine petiole [
PO:0025613; plant anatomy term ]
A petiole (PO:0020038) that is sclerified and persistent.
More Synonyms:
Comments: The petiole (PO:0020038) abcisses longitudinally and the leaf lamina (PO:0020039) withers.
spine stipule [
PO:0025174; plant anatomy term ]
A stipule that is sclerified and pointed.
More Synonyms: barb, barbel, barbella, barbellae, barbellula, barbellulae, barbellule, espina de estípula (Spanish), stipule spine, 托葉とげ (Japanese)
Comments: See also leaf spine (PO:0025173).
spongy mesophyll [
PO:0005647; plant anatomy term ]
Leaf mesophyll parenchyma characterized by little elongated cells, that are not closely packed and have conspicuous intercellular spaces.
More Synonyms: mesófilo esponjoso (Spanish), spongy parenchyma, 海綿状葉肉 (Japanese)
Comments: If you are annotating to this term, please add an additional annotation to vascular leaf (PO:0009025) or non-vascular leaf (PO:0025075), depending on the species. All annotations for angiosperms, gymnosperms, and pteridophytes should go to vascular leaf and all annotations for bryophytes should go to non-vascular leaf.
spongy mesophyll cell [
PO:0006205; plant anatomy term ]
Irregularly-shaped, chlorenchymatous cell, separated by large air spaces.
More Synonyms: célula del mesófilo esponjoso (Spanish), spongy parenchyma cell, 海綿状葉肉細胞 (Japanese)
Comments: Usually found in the abaxial/lower part of the leaf mesophyll as in a dorsiventral leaf, but between two palisade parenchyma layers in an isobilateral leaf. If you are annotating to this term, please add an additional annotation to vascular leaf (PO:0009025) or non-vascular leaf (PO:0025075), depending on the species. All annotations for angiosperms, gymnosperms, and pteridophytes should go to vascular leaf and all annotations for bryophytes should go to non-vascular leaf.
spongy mesophyll intercellular space [
PO:0025381; plant anatomy term ]
A leaf mesophyll intercellular space that is part of a spongy mesophyll.
More Synonyms: espacio intercelular en el mesófilo esponjoso de la hoja (Spanish), 海綿状葉肉細胞間間隙 (Japanese)
Comments:
sporangium [
PO:0025094; plant anatomy term ]
A plant organ (PO:0009008) in which plant spores (PO:0025017) are produced.
More Synonyms: esporangio (Spanish), 胞子嚢 (Japanese), moss capsule, PO:0025232, sporangia, spore capsule, spore case
Comments: In bryophytes, particularly in mosses, a sporangium is referred to as a capsule. In seed plants, a sporangium is located in a sporophyll. In pteridophytes, a sporangium is located on the surface of a sporophyll or fertile leaf or borne on a sporangiophore. May be unicellular in some algae.
sporangium base [
PO:0030040; plant anatomy term ]
A cardinal organ part that is the basal (distal) part of a sporangium.
More Synonyms: apophysis, base del esporangio (Spanish), 胞子嚢基部 (Japanese), hypophysis, sporangium neck
Comments: Term used for bryophytes and pteridophytes. The sporangium base is the sterile part of the sporangium below the sporangium theca. If swollen and distinct from the rest of the sporangium, it is called an apophysis or hypophysis.
sporangium locule [
PO:0025265; plant anatomy term ]
A locule that is a cavity in a sporangium or several fused sporangia.
More Synonyms: 胞子嚢室 (Japanese), lóculo de la antera (Spanish), PO:0025271, spore capsule locule
Comments: May be filled with spores.
sporangium theca [
PO:0030041; plant anatomy term ]
A cardinal organ part that is the main body of a sporangium and has spores located in it.
More Synonyms: 胞子嚢殻 (Japanese), sporangium urn, teca del esporangio (Spanish)
Comments: Term used for bryophytes and pteridophytes.
sporangium wall [
PO:0025306; plant anatomy term ]
A cardinal organ part (PO:0025001) that is composed of the outer layers of a sporangium (PO:0025094) and bounds the archesporium (PO:0030074) or plant spores (PO:0025017).
More Synonyms: 胞子嚢壁 (Japanese), pared del esporangio (Spanish), sporangium jacket layer, sporangium jacket layers
Comments: May have multiple layers such as exothecium, endothecium and tapetum. Early in development, the sporangium wall bounds the archesporium. Later, after spores develop from the archesporium, it bounds the spore or spores.
sporangium wall endothecium [
PO:0030049; plant anatomy term ]
A portion of ground tissue PO:0025059) that is the sub-epidermal layer of a sporangium wall (PO:0025306).
More Synonyms: endotecio de la pared del esporangio (Spanish), endothecium of sporangium wall, 胞子嚢壁内皮 (Japanese)
Comments: Term used for vascular plants to describe the outermost layer of a sporangium wall that is internal to the exothecium.
spore capsule annulus [
PO:0025093; plant anatomy term ]
A dehiscence zone that is part of a spore capsule.
More Synonyms: anillo de la cápsula de musgos (Spanish), capsule dehiscence zone, 胞子蒴(さく)環帯 (Japanese), spore capusule annuli
Comments: Found in bryophytes. The capsule annulus is located at the base of an operculum. Upon capsule maturation, cell separation in the annulus allows the operculum to separate from the capsule, aiding in spore dispersal.
spore capsule calyptra [
PO:0030037; plant anatomy term ]
A cardinal organ part (PO:0025001) that develops from an archegonium (PO:0025126) and is a cap or hood enclosing the sporangium (syn: spore capsule; PO:0025094).
More Synonyms: コケ類 蘚帽 (Japanese), caliptra de la cápsula productora de esporas (Spanish), spore capsule calyptrae
Comments: Found in bryophytes. The spore capsule calyptra is a membranous or hairy cap or hood, composed of gametophytic tissue (venter; PO:0030038) that protects the embryonic sporophyte within the archegonium (PO:0025126). In some species, it may persist after the sporophyte develops and gets carried upward as the seta (PO:0030032) elongates. The spore capsule calyptra is usually lost before the spores are released, and its shape can be used for identification purposes.
spore capsule columella [
PO:0025231; plant anatomy term ]
A columella that forms the central axis of a spore capsule.
More Synonyms: コケ類 蒴(さく)軸柱 (Japanese), columela de la cápsula de musgo (Spanish)
Comments: Found in bryophytes.
spore capsule mouth [
PO:0030017; plant anatomy term ]
A plant anatomical space that is the opening on the apical end of a spore capsule.
More Synonyms: boca de la cápsula productora de esporas (Spanish), 胞子嚢口 (Japanese), sporangium mouth
Comments: May be covered by a peristome.
spore capsule operculum [
PO:0030044; plant anatomy term ]
A cardinal organ part that is the apical part of a spore capsule that separates from the rest of the capsule during dehiscence.
More Synonyms: 胞子嚢蓋 (Japanese), opérculo de la cápsula productora de esporas (Spanish), sporangium lid, spore capsule lid, spore capsule opercula
Comments: Found in mosses. May remain partly attached to the rest of the capsule.
spore capsule valve [
PO:0025229; plant anatomy term ]
A valve that is a part of a spore capsule that splits apart when the spore capsule dehisces.
More Synonyms: コケ類 蒴(さく)弁 (Japanese), valva de la cápsula de musgo (Spanish)
Comments: Found in bryophytes. A spore capsule may dehisce ongitudinally, forming evenely sized valves, or it may dehisce at the capsule annulus, forming the operculum, which is a specialized type of valve.
sporocyte [
PO:0006204; plant anatomy term ]
A native plant cell (PO:0025606) which is diploid (2n), and undergoes meiosis (GO:0007126) to produce four haploid (1n) plant spores (PO:0025017).
More Synonyms: esporocito (Spanish), 胞子母細胞 (Japanese), meiocyte, spore mother cell
Comments:
sporophyll [
PO:0009026; plant anatomy term ]
A leaf-like organ on which one or more sporangia are borne.
More Synonyms: esporofilo (Spanish), 胞子葉 (Japanese), spore leaf
Comments:
sporophyll margin [
PO:0025016; plant anatomy term ]
The margin of a sporophyll.
More Synonyms: 芽胞葉、実葉、胞子葉 縁 (Japanese), margen del esporofilo (Spanish)
Comments:
sporophyte foot [
PO:0030029; plant anatomy term ]
A plant organ that is the base of a whole plant in the sporophytic phase and attaches it to the gametophore.
More Synonyms: 胞子体あし (Japanese), pie del esporofito (Spanish)
Comments: Found in bryophytes and some pteridophytes. In mosses, the foot is located below the seta. In ferns, the foot is formed from the upper hypobasal quandrant of the embryo. The sporophyte foot serves for both attachment and absorption. The outer portion of the foot is composed of absorptive transfer cells.
sporophyte meristematic apical cell [
PO:0030015; plant anatomy term ]
A meristematic apical cell that is part of a whole plant in the sporophytic phase.
More Synonyms: célula apical esporofítica (Spanish), 胞子体分裂組織の頂端細胞 (Japanese), sporophyte apical cell, sporophyte apical initial, sporophytic meristematic apical cell
Comments: Occurs in pteridophytes and the sporophyte of bryophytes.
stalk [
PO:0025066; plant anatomy term ]
A cardinal organ part (PO:0025001) that is elongated and sub-cylindrical to cylindrical and supports another cardinal organ part.
More Synonyms: stipe, tallo de alto orden (secundario, terciario, etc) (Spanish), 柄 (Japanese)
Comments: Some stalks may be ridged or grooved.
stamen [
PO:0009029; plant anatomy term ]
A microsporophyll bearing one or more microsporangia.
More Synonyms: estambre (Spanish), 雄蕊 (Japanese), PO:0006441, PO:0006472, Poaceae stamen, Zea stamen
Comments: Part of tassel floret.
stamen anlagen [
PO:0025486; plant anatomy term ]
A phyllome anlagen (PO:0025430) that will give rise to a stamen primordium (PO:0004705) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
More Synonyms: anlagen del estambre (Spanish), 雄蕊原基 (Japanese)
Comments:
stamen epidermis [
PO:0025097; plant anatomy term ]
A portion of phyllome epidermis that is part of a stamen.
More Synonyms: epidermis del estambre (Spanish), 雄蕊表皮 (Japanese)
Comments:
stamen margin [
PO:0025020; plant anatomy term ]
The margin of a stamen.
More Synonyms: 雄蕊縁 (Japanese), margen del estambre (Spanish)
Comments: Only flattened stamens can have a margin.
stamen primordium [
PO:0004705; plant anatomy term ]
A phyllome primordium (PO:0025128) that develops from a stamen anlagen (PO:0025486) and is committed to the development of a stamen (PO:0009029).
More Synonyms: 雄蕊原基(可視的) (Japanese), portion of stamen primordium tissue, primordio de estambre (Spanish), stamen primordia
Comments:
stamen stomatal complex [
PO:0025220; plant anatomy term ]
A phyllome stomatal complex that is part of a stamen.
More Synonyms: complejo estomático del estambre (Spanish), 雄蕊気孔装置 (Japanese), stamen epidermal stomatal complex, stamen epidermis stomatal complex
Comments:
stamen trichome [
PO:0025209; plant anatomy term ]
A phyllome trichome that is part of a stamen epidermis.
More Synonyms: 雄蕊毛(毛茸、糸状体) (Japanese), tricoma vascular del estambre (Spanish)
Comments:
stamen vascular system [
PO:0005018; plant anatomy term ]
A phyllome vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a stamen.
More Synonyms: 雄蕊維管系 (Japanese), sistema vascular del estambre (Spanish)
Comments:
staminate flower [
PO:0025600; plant anatomy term ]
A flower (PO:0009046) that includes as part an androecium (PO:0009061), and the gynoecium (PO:0009062) is absent or has aborted during development.
More Synonyms: adenate flower, diclinous flower, imperfect flower, male flower
Comments:
staminate inflorescence [
PO:0025601; plant anatomy term ]
An inflorescence (PO:0009049) that includes as part only staminate flowers (PO:0025600).
More Synonyms: male inflorescence
Comments:
staminode [
PO:0009077; plant anatomy term ]
Sterile stamen.
More Synonyms: estaminodio (Spanish), staminodia, staminodium, 仮雄蕊 (Japanese)
Comments:
stele [
PO:0025197; plant anatomy term ]
A cardinal organ part (PO:0025001) that is the central column of a plant axis that consists of the primary vascular tissue and associated ground tissue.
More Synonyms: estela (Spanish), 中心柱, central cylinder (Japanese)
Comments: If a pith is present, it is part of the stele, otherwise the stele only includes the primary vascular tissue and the ground tissue that surrounds it.
stem [
PO:0009047; plant anatomy term ]
A shoot axis (PO:0025029) that is the primary axis of a plant.
More Synonyms: bole, caña (Spanish), cane, caudex, caudices, culm, eje primario (Spanish), 茎 (Japanese), primary axis, primary stem, primocane, scape, stalk, tallo (Spanish), tronco (Spanish), trunk
Comments: Often bears leaves and buds. It is usually above ground, more or less negatively geotropic, and exogenous in origin.
stem aerenchyma [
PO:0006214; plant anatomy term ]
A portion of aerenchyma that is part of a stem.
More Synonyms: aerénquima del tallo (Spanish), 茎通気組織 (Japanese)
Comments:
stem apex tendril [
PO:0025365; plant anatomy term ]
A shoot axis that arises from the apical part of a stem and is slender and coiling.
More Synonyms: ápice en zarzillo del tallo (Spanish), 茎頂端巻きひげ (Japanese), tendril
Comments: Aids plant in climbing. May be branched, may have adhesive disks at its distal end, may be woody, and may bear small leaves. A stem apex tendril differs from a branch tendril in that it arises from the shoot apical meristem, rather than in an axil. However, a shoot apex tendril may arise either from the apex itself, in which case it is terminal, or from the side of an apical meristem, in which case it is a lateral structure. In the latter case, the main stem of the plant undergoes sympodial growth. A stem apex tendril is often located on the opposite side of a stem from a leaf at the same node, as in Vitaceae. See also leaf tendril (PO:0025361), leaflet tendril (PO:0025362), leaf apex tendril (PO:0025363), branch tendril (PO:0025364), leaf rachis tendril (PO:0025366), and prophyll tendril (PO:0025365). Careful observation is required to correctly classify some tendrils.
stem base [
PO:0008039; plant anatomy term ]
The basal part of stem.
More Synonyms: base del tallo (Spanish), 茎基部 (Japanese), gametophore stem base
Comments:
stem cortex [
PO:0025612; plant anatomy term ]
A portion of shoot axis cortex (PO:0000223) that is part of a stem (PO:0009047).
More Synonyms:
Comments:
stem epidermis [
PO:0025178; plant anatomy term ]
A portion of shoot axis epidermis (PO:0000112) that is part of a stem (PO:0009047).
More Synonyms: culm epidermis, epidermis del tallo (Spanish), 茎表皮 (Japanese)
Comments:
stem hypodermis [
PO:0025610; plant anatomy term ]
A portion of hypodermis (PO:0005051) that is part of a stem cortex (PO:0025612).
More Synonyms:
Comments:
stem intercalary meristem [
PO:0006347; plant anatomy term ]
An intercalary meristem (PO:0006073) that is part of a stem internode (PO:0020142) and is intercalated between two portions of non-meristematic tissue.
More Synonyms: 茎介在分裂組織 (Japanese), meristema intercalar del tallo (Spanish)
Comments: Results in an increase in length of a stem internode, as part of primary growth.
stem internode [
PO:0020142; plant anatomy term ]
A shoot axis internode (PO:0005005) that is part of a stem (PO:0009047).
More Synonyms: 茎節間 (Japanese), internodo del tallo (Spanish)
Comments: See node.
stem internode differentiation zone [
PO:0008042; plant anatomy term ]
A shoot internode differentiation zone that is part of a stem internode.
More Synonyms: 茎節間分化帯(層) (Japanese), zona de diferenciación del internodo del tallo (Spanish)
Comments: Primary, not secondary, tissue differentiation occurs in a differentiation zone.
stem internode elongation zone [
PO:0008041; plant anatomy term ]
A shoot internode elongation zone that is part of a stem internode.
More Synonyms: 茎節間伸長帯(層) (Japanese), zona de elongación del internodo del tallo (Spanish)
Comments:
stem node [
PO:0020141; plant anatomy term ]
A shoot node that is part of a stem.
More Synonyms: 茎節 (Japanese), nodo del tallo (Spanish)
Comments:
stem procambium [
PO:0025273; plant anatomy term ]
A portion of shoot axis procambium gives rise to the primary vascular tissue of a stem.
More Synonyms: 茎前形成層 (Japanese), procambio del tallo (Spanish)
Comments:
stem secondary thickening meristem [
PO:0025442; plant anatomy term ]
A secondary thickening meristem (PO:0025414) that is part of a stem (PO:0009047).
More Synonyms: 茎二次肥厚分裂細胞 (Japanese), meristema de engrosamiento secundario del tallo (Spanish)
Comments:
stem stele [
PO:0025200; plant anatomy term ]
A shoot axis stele that is part of a stem.
More Synonyms: estela del tallo (Spanish), 茎中心柱 (Japanese)
Comments:
stem tegument layer [
PO:0025611; plant anatomy term ]
A portion of shoot axis tegument layer (PO:0025609) that a tough, protective outer layer on a stem (PO:0009047) and includes as parts a stem hypodermis (PO:0025610) and a stem epidermis (PO:0025178).
More Synonyms: stem rind
Comments:
stem trichome [
PO:0025176; plant anatomy term ]
A shoot axis trichome that is part of a stem epidermis.
More Synonyms: 茎の毛 (Japanese), stem hair, tricoma del tallo (Spanish)
Comments:
stereid [
PO:0030045; plant anatomy term ]
A ground tissue cell with thickened cell walls.
More Synonyms: estereida (Spanish), 補強細胞 (Japanese), stereid cell
Comments: Found only in bryophytes in gametophore axes, setae, or leaves. Functions in support rather than conduction. May or may not retain a living protoplast at maturity.
stereome [
PO:0030050; plant anatomy term ]
A portion of ground tissue that has as parts stereid cells and no other cell types.
More Synonyms: estereomo (Spanish), 機械組織 (Japanese)
Comments: A stereome is composed of only stereids. Found only in bryophytes in gametophore axes or non-vascular leaves. May function in support.
sterile lemma [
PO:0009040; plant anatomy term ]
A flower bract in the position of a lemma, but not enclosing floral organs.
More Synonyms: empty glume, lemma estéril (Spanish), PO:0006029, 不稔外頴 (Japanese)
Comments: An undeveloped androecium or gynoecium may or may not be detectable. If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding spikelet type, if known. Choose the most specific term possible from: ear spikelet (PO:0006320), ear pedicellate spikelet (PO:0006348), ear sessile spikelet (PO:0006349), tassel spikelet (PO:0006309), tassel pedicellate spikelet (PO:0006312), tassel sessile spikelet (PO:0006311).
stigma [
PO:0009073; plant anatomy term ]
A cardinal organ part that is part of a carpel or group of fused carpels on which the pollen germinates, usually apical.
More Synonyms: estigma (Spanish), PO:0006468, PO:0006487, Poaceae stigma, stigmas, stigmata, Zea stigma, 柱頭 (Japanese)
Comments: If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), ear floret (PO:0006354), upper floret of pedicellate spikelet of ear (PO:0006350), upper floret of sessile spikelet of ear (PO:0006352), tassel floret (PO:0006310), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).
stigma epidermis [
PO:0006061; plant anatomy term ]
A portion of carpel epidermis that is part of a stigma.
More Synonyms: epidermis del estigma (Spanish), PO:0006497, Poaceae stigma epidermis, 柱頭 表皮 (Japanese)
Comments: If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), ear floret (PO:0006354), upper floret of pedicellate spikelet of ear (PO:0006350), upper floret of sessile spikelet of ear (PO:0006352), tassel floret (PO:0006310), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).
stigma papilla cell [
PO:0025168; plant anatomy term ]
A papilla cell that is part of a stigma epidermis.
More Synonyms: célula papilosa del estigma (Spanish), 柱頭乳頭細胞 (Japanese)
Comments: See stigma papilla (GO:0090397) for the subcellular component stigma papilla.
stigma vascular system [
PO:0008012; plant anatomy term ]
A vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a stigma.
More Synonyms: sistema vascular del estigma (Spanish), stigma vein, 柱頭維管系 (Japanese)
Comments:
stipel [
PO:0020051; plant anatomy term ]
Stipule-like appendage(s) at the base of a leaflet (in unifoliolate or simple leaves, found at the top of the petiole).
More Synonyms: estipelo (Spanish), 小托葉 (Japanese)
Comments:
stipule [
PO:0020041; plant anatomy term ]
A cardinal organ part that is an appendage at the base of a vascular leaf.
More Synonyms: estípula (Spanish), 托葉 (Japanese)
Comments: Usually one of a pair of appendages. May take the form of a spine (PO:0025174) or may be bristled or brush-like. Stipules may occur on the opposite side of the shoot axis from the leaf they are associated with, but they are still thought to arise from part of the leaf.
stolon [
PO:0003024; plant anatomy term ]
A branch that is slender, prostrate or trailing and above-ground and produces roots and sometimes erect shoots at its nodes.
More Synonyms: ストロン、ほふく茎 (Japanese), estolón (Spanish), runner
Comments: The stolon develops from an axillary bud and produces adventitious roots at the nodes and a terminal aerial stem. That stem then sends out one or more stolons from its axillary buds and the process is reiterated. A unique part of this process is that the first internode of a stolon is very long and then the shoot becomes an erect rosette.
stomatal complex [
PO:0002000; plant anatomy term ]
A portion of shoot epidermis that has as parts two guard cells and a stomatal pore. May also contain subsidiary cells.
More Synonyms: complejo estomático (Spanish), stoma, stomata, stomatal apparatus, stomate, 気孔装置 (Japanese)
Comments:
stomatal initial cell [
PO:0000062; plant anatomy term ]
An epidermal initial cell (PO:0000349) that undergoes several rounds of uneven division, each time giving rise to a larger daughter cell that differentiates into an epidermal ground cell and a smaller daughter cell that remains meristematic, until the meristematic cell (PO:0004010) differentiates into a guard mother cell (PO:0000351).
More Synonyms: inicial estomática (meristemoide inicial) (Spanish), stomatal initial, stomatal meristemoid, 気孔始原細胞 (Japanese)
Comments:
stomatal pore [
PO:0008032; plant anatomy term ]
A plant anatomical space that forms an opening in an epidermis, flanked by two guard cells.
More Synonyms: poro estomático (Spanish), stoma, stomata, stomatal aperture, 気孔開口部 (Japanese)
Comments: The size of the stomatal pore is variable and controlled by movement of the guard cells in response to environmental cues.
stomium [
PO:0020101; plant anatomy term ]
A plant anatomical space that is a slit in an anther lobe formed from when a dehiscence zone dehisces.
More Synonyms: estomio (Spanish), PO:0006449, PO:0006485, Poaceae stomium, stomia, Zea stomium, 口辺細胞 (Japanese)
Comments: Pollen may be released through the stomium. If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), tassel floret (PO:0006310), lower floret of pedicellate spikelet of tassel (PO:0006313), lower floret of sessile spikelet of tassel (PO:0006315), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).
storage parenchyma [
PO:0025035; plant anatomy term ]
A portion of parenchyma (PO:0005421) specialized for carbohydrate storage.
More Synonyms: 貯蔵柔組織 (Japanese), flesh, fleshy tissue, parénquima de reserva (Spanish), portion of storage parenchyma
Comments: This tissue could be found in any organ, but often occurs in fruits or tubers. New GO term carbohydrate storage has been requested.
strobilus [
PO:0025083; plant anatomy term ]
A reproductive shoot system (PO:0025082) consisting of a number of sporophylls (PO:0009026) or plant ovule (PO:0020003)-bearing modified leaves (PO:0025034) grouped terminally on a stem (PO:0009047).
More Synonyms: compound strobilus, cone, cono (Spanish), estróbilo (Spanish), 胞子嚢穂, 球花 (Japanese), simple strobilus, strobili
Comments: May be simple or compound. Found in lycophytes such as Selaginella and Lycopodium, sphenophytes such as Equisetum, gymnosperms such as cycad, conifers, gnetophytes and the pollen producing structures of Gingko. The term cone is often used for strobili that are woody. Flowers are sometimes considered bisexual strobili. Some flowering plants such as Alnus have inflorescences called catkins that resemble strobili, but are not.
strobilus bud [
PO:0025085; plant anatomy term ]
A bud that develops into a strobilus.
More Synonyms: cone bud, 珠果芽 (Japanese), yema estrobilar (Spanish)
Comments:
strophiole [
PO:0019023; plant anatomy term ]
An arilloid that is an outgrowth of a seed on a raphe.
More Synonyms: ストロフィオール (Japanese), estrofiolo (Spanish)
Comments:
style [
PO:0009074; plant anatomy term ]
An elongated part of a carpel or group of fused carpels between the ovary and the stigma, and through which the pollen tube grows.
More Synonyms: estilo (Spanish), 花柱 (Japanese), PO:0006469, PO:0006488, Poaceae style, silk, Zea style
Comments: If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), ear floret (PO:0006354), upper floret of pedicellate spikelet of ear (PO:0006350), upper floret of sessile spikelet of ear (PO:0006352), tassel floret (PO:0006310), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).
style epidermis [
PO:0006062; plant anatomy term ]
A portion of carpel epidermis that is part of a style.
More Synonyms: epidermis del estilo (Spanish), 花柱表皮 (Japanese), PO:0006498, Poaceae style epidermis, transmitting tract epidermis
Comments: If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), ear floret (PO:0006354), upper floret of pedicellate spikelet of ear (PO:0006350), upper floret of sessile spikelet of ear (PO:0006352), tassel floret (PO:0006310), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).
subsidiary cell [
PO:0000284; plant anatomy term ]
An epidermal cell associated with a stoma and at least morphologically distinguishable from the other epidermal cells.
More Synonyms: accessory cell, célula subsididaria (Spanish), PO:0000296, 助細胞,副細胞(気孔)(auxiliary cell, synergid) (Japanese)
Comments:
substomatal cavity [
PO:0025382; plant anatomy term ]
An intercellular space that is located directly below and contiguous with a stomatal pore.
More Synonyms: cavidad subestomática (Spanish), 気孔下腔、呼吸腔 (Japanese)
Comments:
subterranean tuber [
PO:0004547; plant anatomy term ]
A shoot axis tuber (PO:0004543) that develops below ground.
More Synonyms: tubérculo subterráneo (Spanish), 地下塊茎 (Japanese)
Comments: Functions in storage of photosynthate metabolites. This term should be used for tubers derived from branches, as found in Solanum spp. (e.g. potato) or Dioscorea spp. (e.g. yam) and other species. Use the term tuberous root tuber (PO:0025476) for tubers derived from roots, such as those found in Cassava, Ipomoea, or Hemerocallis.
subterranean tuber axillary bud meristem [
PO:0025070; plant anatomy term ]
A tuber axillary bud meristem that is part of a subterranean tuber.
More Synonyms: meristema axilar de yema de tubérculo subterráneo (Spanish), 地下塊茎腋芽 分裂組織 (Japanese)
Comments:
subterranean tuber axillary shoot [
PO:0025081; plant anatomy term ]
An axillary shoot that develops from a subterranean tuber axillary bud.
More Synonyms: epiblasto (epiblastema) axilar de tubérculo subterráneo (Spanish), tuber sprout, 地下塊茎腋 分げつ (Japanese)
Comments: See also subterranean tuber axillary bud (PO:0025042).
subterranean tuber axillary vegetative bud [
PO:0025042; plant anatomy term ]
A tuber axillary vegetative bud that is part of a subterranean tuber.
More Synonyms: eye, potato eye, swollen eye, tuber eye, yema vegetativa axilar de tubérculo subterráneo (Spanish), 地下塊茎腋栄養芽 (Japanese)
Comments: A structure on the tuber surface that can sprout. In potatoes, axillary vegetative buds (eyes) can determine processing quality. Scale that the breeders use to rate the buds/sprouts of tubers: 1. none, 2. swollen eye, 3. sprout ca. 1/4", 4. sprout ca. 1/2", 5. sprout ca. 1", 6. sprout ca. 2", 7. sprout ca. 3", 8. new top growth, 9. chain tubers.
subterranean tuber cortex [
PO:0025057; plant anatomy term ]
A portion of tuber cortex that is part of a subterranean tuber storage parenchyma.
More Synonyms: corteza del tubérculo subterráneo (Spanish), Outer storage tissue, 地下塊茎 皮層 (Japanese)
Comments:
subterranean tuber epidermis [
PO:0025048; plant anatomy term ]
A tuber epidermis that is part of a subterranean tuber.
More Synonyms: epidermis de tubérculo subterráneo (Spanish), young potato tuber skin, 地下塊茎 表皮 (Japanese)
Comments: The skin of young potatoes is epidermis while the skin of mature potatoes is periderm.
subterranean tuber interfascicular region [
PO:0025049; plant anatomy term ]
A tuber interfascicular region that is part of a subterranean tuber storage parenchyma.
More Synonyms: región interfascicular de tubérculo subterráneo (Spanish), 地下塊茎維管束間領域 (Japanese)
Comments: Because subterranean interfascicular regions in potato tubers form before the subterranean tuber perimedullary zone expands (PO:0025063), in mature potato tubers, the subterranean tuber interfascicular regions persist as rays that extend from the central pith to the eyes or subterranean tuber axillary vegetative buds (PO:0025042).
subterranean tuber periderm [
PO:0025045; plant anatomy term ]
A portion of tuber periderm that is part of a subterranean tuber.
More Synonyms: mature potato tuber skin, peridermis de tubérculo subterráneo (Spanish), 地下塊茎 周皮 (Japanese)
Comments: The skin of young potatoes is epidermis while the skin of mature potatoes is periderm.
subterranean tuber perimedullary zone [
PO:0025063; plant anatomy term ]
A tuber perimedullary zone that is part of a subterranean tuber pith.
More Synonyms: zona perimedular del tubérculo subterráneo (Spanish), 地下塊茎 髄冠 (Japanese)
Comments:
subterranean tuber pith [
PO:0025053; plant anatomy term ]
A portion of tuber pith (PO:0025052) that is part of a subterranean tuber storage parenchyma (PO:0025038).
More Synonyms: médula del tubérculo subterráneo (Spanish), water core, 地下塊茎 髄 (Japanese)
Comments: In potatoes, this is part of the flesh.
subterranean tuber storage parenchyma [
PO:0025038; plant anatomy term ]
A portion of tuber storage parenchyma (PO:0025035) that is part of a subterranean tuber (PO:0004547).
More Synonyms: parénquima de reserva de tubérculo subterráneo (Spanish), potato tuber flesh, 地下塊茎 貯蔵柔組織 (Japanese)
Comments: This term is used to refer to potato tuber flesh. See part_of children for individual components of subterranean tuber flesh.
suspensor [
PO:0020108; plant anatomy term ]
An embryonic plant structure at the base of a plant embryo that develops from an embryonic basal cell and connects an embryo proper to the wall of a megagametophyte.
More Synonyms: 胚柄 (Japanese), suspensor (Spanish)
Comments: The suspensor often allows the embryo to penetrate deep into the endosperm. Across plant species, suspensors are morphologically diverse and may be single- or multicellular, undifferentiated or highly differentiated, and variously shaped.
synergid [
PO:0000191; plant anatomy term ]
Cell, usually two in number, in the micropylar end of the embryo sac of angiosperms associated with the egg in the egg apparatus.
More Synonyms: sinérgida (Spanish), 助細胞 (Japanese)
Comments: