idioblast [
PO:0000283; plant anatomy term ]
A native plant cell (PO:0025606) that markedly differs in form, size, or contents from other cells in the same tissue.
More Synonyms: 異形(型)細胞 (Japanese), idioblasto (Spanish)
Comments: Often contains deposit of minerals or products of secondary metabolism. May have a specialized function.
in vitro plant structure [
PO:0000004; plant anatomy term ]
A plant structure (PO:0009011) that is grown or maintained in vitro.
More Synonyms: estructura vegetal in vito (Spanish), 培養下植物構造 (Japanese)
Comments: In vitro growth is defined as microbe-free growth in a sterile, culture environment, usually in the laboratory. An example of a sterile culture environment is growth on or in a nutrient medium in a Petri dish, culture flask or test tube. Microbes may be intentionally added to the culture environment, such as in co-culture with Agrobacterium.
included phloem [
PO:0004524; plant anatomy term ]
A portion of secondary phloem tissue produced by included vascular cambium.
More Synonyms: floema incluido (Spanish), floema interno (Spanish), 材内師部 (Japanese)
Comments:
included vascular cambium [
PO:0004523; plant anatomy term ]
Cambium occurring within xylem.
More Synonyms: cambium vascular interno (Spanish), 材内維管形成層 (Japanese)
Comments:
indeterminate nodule [
PO:0004538; plant anatomy term ]
A root nodule characterized by a persistent meristem, presence of vascular transfer cells, and cell division in the inner cortex with non-dividing infected cells and bacteria.
More Synonyms: 無限型根粒 (Japanese), nódulo indeterminable (Spanish)
Comments: Nodule is persistent and may continue to grow after a physiological stress.
inflorescence [
PO:0009049; plant anatomy term ]
A reproductive shoot system (PO:0025082) that has as parts all of the shoot axes (PO:0025029) distal to the most distal foliage leaf (PO:0009025) of a shoot axis and all of the flowers (PO:0009046) borne by those axes. Must have two or more flowers as parts.
More Synonyms: ament, anthela, anthelae, Asteraceae floret, bostryches, bostryx, capitula, capitulum, catkin, cincinni, cincinnus, corymb, cyathia, cyathium, cyme, cymule, dichasium, drepanium, 花序 (Japanese), glome, glomerule, head, helicoid cyme, inflorescencia (Spanish), monochasium, panicle, PO:0009048, PO:0009050, PO:0020088, PO:0020111, PO:0020112, PO:0020113, PO:0020114, PO:0020115, PO:0020116, PO:0020117, PO:0020118, PO:0020119, PO:0020120, raceme, rhipidia, rhipidium, scorpioid cyme, Sorghum cob, spadices, spadix, spike, thyrse, Triticeae spike, umbel, verticillaster
Comments: Some plants have only solitary flowers, e.g. Magnolia.
inflorescence apical meristem [
PO:0009108; plant anatomy term ]
A reproductive shoot apical meristem that gives rise to the apical growth of the inflorescence. It develops from the shoot apical meristem (SAM) after it undergoes transition from vegetative to reproductive phase.
More Synonyms: 花序頂端分裂組織 (Japanese), meristema apical de la inflorescencia (Spanish)
Comments:
inflorescence axis [
PO:0020122; plant anatomy term ]
A shoot axis (PO:0025029) that is part of an inflorescence (PO:0009049).
More Synonyms: eje de la inflorescencia (Spanish), 花序軸 (Japanese), first order inflorescence branch, inflorescence rachis
Comments:
inflorescence axis internode [
PO:0006326; plant anatomy term ]
A shoot axis internode (PO:0005005) that is part of an inflorescence axis (PO:0020122).
More Synonyms: 花序節間 (Japanese), internodo de la inflorescencia (Spanish)
Comments:
inflorescence bract [
PO:0009054; plant anatomy term ]
A bract (PO:0009055) subtending a branch of the inflorescence (PO:0009049) or borne on the inflorescence axis (PO:0020122) below any branch (PO:0025073) or flower (PO:0009046).
More Synonyms: bráctea de la inflorescencia (Spanish), corn husk, 花序苞 (Japanese), husk, husk leaf, inflorescence bract of ear, pale, palea, paleae, paleas, palet, PO:0006337, spathe, squamella, squamellae, squamule
Comments: Includes the leaf subtending and acting as outer envelope of an ear in Zea mays.
inflorescence bract primordium [
PO:0025489; plant anatomy term ]
A bract primordium (PO:0025128) is committed to the development of an inflorescence bract (PO:0009054).
More Synonyms: 花序苞原基 (Japanese), inflorescence bract primordia, portion of inflorescence bract primordium tissue, primordio de la bráctea de la inflorescencia (Spanish)
Comments:
inflorescence branch [
PO:0009081; plant anatomy term ]
An inflorescence axis (PO:0020122) that is a branch (PO:0009081) arising from a first order inflorescence axis (PO:0025104) or from a higher order inflorescence branch.
More Synonyms: coflorescence, conflorescencia (Spanish), 花序枝 (Japanese), paraclade, paraclado (Spanish), PO:0004720
Comments:
inflorescence branch crown [
PO:0025134; plant anatomy term ]
A shoot system that forms the basal part of an inflorescence to which the pedicels are attached and in which the internodes do not elongate, giving the appearance of a ridge of raised tissue.
More Synonyms: banana crown, corona de la ramificación de la inflorescencia (Spanish), 花序枝 冠 (Japanese), Musa crown
Comments:
inflorescence branch meristem [
PO:0009105; plant anatomy term ]
An inflorescence meristem (PO:0009108) that gives rise to an inflorescence branch (PO:0009081).
More Synonyms: 花序側部(側方)分裂組織 (Japanese), meristema lateral de la inflorescencia (Spanish)
Comments:
inflorescence branch pulvinus [
PO:0009017; plant anatomy term ]
A pulvinus (PO:0009000) of an inflorescence branch (PO:0009081).
More Synonyms: 花序枝葉枕 (Japanese), pulvínulo ramificado de una inflorescencia (Spanish)
Comments:
inflorescence bud [
PO:0000057; plant anatomy term ]
A bud that develops into an inflorescence.
More Synonyms: 花序芽 (Japanese), male bud, yema de inflorescencia (Spanish)
Comments:
inflorescence meristem [
PO:0000230; plant anatomy term ]
A meristem that gives rise to an inflorescence.
More Synonyms: 花序分裂組織 (Japanese), meristema de la inflorescencia (Spanish)
Comments:
inflorescence node [
PO:0006325; plant anatomy term ]
A shoot node that is part of an inflorescence axis and where a spikelet, flower, floret or inflorescence branch is attached.
More Synonyms: 花序節 (Japanese), nodo de la inflorescencia (Spanish)
Comments:
inflorescence vascular system [
PO:0005028; plant anatomy term ]
A shoot system vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in an inflorescence.
More Synonyms: 花序維管系 (Japanese), sistema vascular de inflorescencia (Spanish)
Comments:
infructescence [
PO:0006342; plant anatomy term ]
A reproductive shoot system (PO:0025082) that develops from an inflorescence (PO:0009049) and has as parts all of the shoot axes (PO:0025029) distal to the most distal foliage leaf (PO:0009025) of a shoot axis and all of the fruits (PO:0009001) borne by those axes.
More Synonyms: banana bunch, fruit bunch, infructescencia (Spanish), 果序 (Japanese)
Comments:
infructescence axis [
PO:0025242; plant anatomy term ]
A shoot axis (PO:0025029) that is part of an infructescence (PO:0006342).
More Synonyms: eje de la infructescencia (Spanish), Maize cob, 果序軸 (Japanese)
Comments:
infructescence branch [
PO:0025243; plant anatomy term ]
An infructescence axis (PO:0025242) that is a branch (PO:0025073) from a primary or higher order infructescence axis.
More Synonyms: ramificación de la infructescencia (Spanish), 果序枝 (Japanese)
Comments:
initial cell [
PO:0004011; plant anatomy term ]
A meristematic cell (PO:0004010) that by division gives rise to two cells, one of which remains meristematic, while the other is added to the plant body.
More Synonyms: célula inicial (Spanish), initial, meristemoid, PO:0000070, stem cell, 始原細胞 (Japanese)
Comments: Initial cells are often part of a portion of tissue that is composed mostly of somewhat older, differentiating cells. The division of an initial cell is often uneven, with the smaller daughter cell remaining meristematic.
inner integument [
PO:0020022; plant anatomy term ]
The innermost of the two layers of tissue that usually cover the ovule, contiguous to the nucellus and usually contributing to the formation of the micropyle at the apex.
More Synonyms: integumento interno (Spanish), PO:0006460, Poaceae inner integument, 内珠皮 (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).
inner integument epidermis [
PO:0006044; plant anatomy term ]
The epidermis of the inner integument in an ovule.
More Synonyms: epidermis del integumento interior (Spanish), 内珠皮表皮 (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).
integument [
PO:0020021; plant anatomy term ]
A portion of plant tissue (PO:0009007) that usually covers a plant ovule (PO:0020003), enveloping a nucellus (PO:0020020) and forming a micropyle (PO:0020025) at the apex.
More Synonyms: 珠皮 (Japanese), integumento (Spanish), PO:0006465, PO:0006507, Poaceae integument, portion of integument tissue, Zea integument
Comments: If you are annotating to this structure for an angiosperm, please add an additional annotation to plant ovary ovule (PO:0025490). If you are annotating to this structure for an gymnosperm, please add an additional annotation to ovuliferous scale ovule (PO:0025491). 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).
integument epidermis [
PO:0006043; plant anatomy term ]
A portion epidermis that is part of an integument.
More Synonyms: 珠皮表皮 (Japanese), epidermis del integumento (Spanish), PO:0006508, Poaceae integument 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).
intercalary meristem [
PO:0006073; plant anatomy term ]
A shoot system meristem (PO:0006079) that is intercalated between two portions of non-meristematic tissue and results in an increase in length as part of primary growth.
More Synonyms: 節間分裂組織、介在分裂組織 (Japanese), meristema intercalar (Spanish)
Comments: See subtypes: leaf intercalary meristem (PO:0006346) and stem intercalary meristem (PO:0006347). Not known to occur in roots. Term for primary growth has been requested in GO.
intercellular space [
PO:0025379; plant anatomy term ]
A plant anatomical space that is part of a portion of plant tissue between two or more cells.
More Synonyms: 細胞間間隙 (Japanese), espacio intercelular (Spanish)
Comments: Often part of a mesophyll (PO:0006070). This term does not include spaces on the surface of a plant structure, like a stomatal pore (PO:0008032), stomium (PO:0020101), or micropyle (PO:0020025), nor larger cavities or canals that are surrounded by tissue, such as an archegonium neck canal (PO:0030066). May be filled with air or fluid.
intercuticular wax [
PO:0025389; plant anatomy term ]
A portion of cuticular wax (PO:0025386) that is an amorphous mixture of lipids embedded in the cutin (PO:0025385) of a plant cuticle proper (PO:0025387).
More Synonyms: クチクラ層間ワックス (Japanese), cera intercuticular (Spanish)
Comments: The intercuticular wax is located adjacent to the cell wall.
interfascicular cambium [
PO:0006201; plant anatomy term ]
A portion of vascular cambium (PO:00055980) that develops from cells in an interfascicular region (PO:0006202) that is part of a shoot system (PO:0009006).
More Synonyms: cambium interfascicular (Spanish), 維管束間形成層 (Japanese)
Comments: Portions of interfascicular cambium may merge with fascicular cambium (PO:0006200) to form a cylinder of cambium or they may remain isolated. May develop from meristematic cells (PO:0004010) that have never differentiated into another cell type or from parenchyma cells (PO:0000074) that retain some meristematic ability.
interfascicular region [
PO:0006202; plant anatomy term ]
A portion of ground tissue located between vascular bundles in a shoot axis.
More Synonyms: 維管束間領域 (Japanese), medullary ray, pith ray, región interfascicular (Spanish)
Comments: Inapplicable for nearly all monocots.
intermediary companion cell [
PO:0025460; plant anatomy term ]
A companion cell (PO:0000400) that has dense cytoplasm, a small vacuole, proplastids rather than chloroplasts, and abundant and highly branched plasmodesmata linking it to adjacent mesophyll cells.
More Synonyms: célula intermediaria acompañante (Spanish), intermediary cell, 中間伴細胞 (Japanese)
Comments: Intermediary companion cells translocate high concentrations of raffinose-family oligosaccharides and are found in plants that use symplastic phloem loading. Unlike sieve tube elements (PO:0000289), intermediary companion cells retain their nuclei and other organelles at maturity.
internal phloem [
PO:0006216; plant anatomy term ]
A portion of primary phloem tissue positioned internal to the primary xylem.
More Synonyms: floema intraxilémico (Spanish), intraxylary phloem, 内部師部 (Japanese)
Comments:
involucral bract [
PO:0009045; plant anatomy term ]
Equals inflorescence bract of an involucre, as in Asteraceae or Compositeae.
More Synonyms: bráctea involucral (Spanish), 総苞片 (Japanese), perigynia, perigynium, phyllary
Comments:
involucre [
PO:0009100; plant anatomy term ]
A collective phyllome structure composed of two or more involucral bracts at the base of a cluster of flowers, as found in Asteraceae or Compositae.
More Synonyms: 総苞 (Japanese), involucro (Spanish)
Comments: The burs or bristles in Cenchrus and Pennisetum are not involucres because the fused structures are branches and not bracts.