obturator [
PO:0020029; plant anatomy term ]
An outgrowth of the funicle, that forms a bridge between the micropyle and other tissues.
More Synonyms: 閉塞組織 (Japanese), obturador (Spanish), portion of obturator tissue
Comments: Most commonly arising from the funicle, also developing from placenta, integument, etc.
oil gland [
PO:0005669; plant anatomy term ]
A gland or a cavity lined with cells that secrete oils.
More Synonyms: glándula aceitosa (Spanish), oil cavity, 油胞、油腺 (Japanese)
Comments: Oil glands are schizogenous.
ordinary companion cell [
PO:0025459; plant anatomy term ]
A companion cell (PO:0000400) that lacks cell wall invaginations and has few or no plasmodesmata connecting it to adjacent mesophyll cells.
More Synonyms: célula ordinaria acompañante (Spanish), 通常の?伴細胞 (Japanese), regular companion cell, standard companion cell
Comments: Found in plants that use apoplastic phloem loading. Unlike sieve tube elements (PO:0000289), ordinary companion cells retain their nuclei and other organelles at maturity.
organ lamina [
PO:0025513; plant anatomy term ]
A lamina (PO:0025060) that is part of a plant organ (PO:0009008).
More Synonyms: lámina órgano (Spanish), 器官 葉身 (Japanese)
Comments:
organ margin [
PO:0025005; plant anatomy term ]
A cardinal organ part that is the edge of an organ and the area immediately internally adjacent to it.
More Synonyms: margen de un órgano (Spanish), 器官縁 (Japanese)
Comments: Only flattened or laminar organs or organ parts will have a margin.
organogenic callus [
PO:0006090; plant anatomy term ]
A cultured plant callus that is capable of forming plant organs.
More Synonyms: callo órganogénico (Spanish), meristematic callus, 器官形成カルス (Japanese)
Comments: Plant organs may be formed after the cultured plant callus is treated with plant growth regulators.
outer integument [
PO:0020023; plant anatomy term ]
One of the two layers of tissue that usually cover the ovule, contiguous to the inner integument and usually involved in forming the micropyle at the apex.
More Synonyms: integumento externo (Spanish), PO:0006459, Poaceae outer integument, 外珠皮 (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).
outer integument epidermis [
PO:0006045; plant anatomy term ]
The epidermis of the outer integument in an ovule.
More Synonyms: epidermis del integumento exterior (Spanish), 外珠皮表皮 (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).
outer vascular cambium [
PO:0004522; plant anatomy term ]
Cambium at the outer margin of the xylem cylinder.
More Synonyms: cambium vascular externo (Spanish), 外側維管 形成層 (Japanese)
Comments:
ovary epidermis [
PO:0006063; plant anatomy term ]
A portion of epidermis that is part of an ovary.
More Synonyms: epidermis del ovario (Spanish), PO:0006500, Poaceae ovary epidermis, 子房表皮 (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).
ovary locule [
PO:0025266; plant anatomy term ]
A locule that is a cavity in an ovary.
More Synonyms: lóculo del ovario (Spanish), sporophyll locule, 子房室 (Japanese)
Comments: Generally contains at least one ovule. An ovary locule may be part of a single carpel, in the case of unicarpellate flowers. An ovary that is part of a syncarpous gynoecium may have multiple locules, or the anatomical spaces of multiple carpels may be fused to form a single locule.
ovary placenta [
PO:0020001; plant anatomy term ]
A portion of placenta tissue that is part of an ovary and to which ovules are attached.
More Synonyms: placenta de ovario (Spanish), PO:0006467, PO:0006490, Poaceae ovary placenta, Zea ovary placenta, 子房胎座 (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).
ovary replum [
PO:0025272; plant anatomy term ]
A portion of ovary placenta tissue that divides an ovary into two or more chambers and develops from contact of the placental tissue from opposite sides of the ovary early in gynoecium development.
More Synonyms: false ovary septum, ovary dissepiment, placental septum, replo (replum) del ovario (Spanish), 子房隔膜 (Japanese)
Comments: An ovary replum develops along with the ovary and has no suture line in its center, while a true ovary septum (PO:0025262) is derived from the fusion two adjacent ovary walls. Common in Brassicaceae. Annotations for Arabidopsis should go here, and not under ovary septum.
ovary septum [
PO:0025262; plant anatomy term ]
A septum that divides a multilocular ovary.
More Synonyms: carpel synonym, ovary dissepiment, ovary septa, septo del ovario (Spanish), 子房隔壁 (Japanese)
Comments: Found in species with syncarpous gynoecia (fused carpels). An ovary septum is derived from the fused walls of two adjacent carpels, while a replum (PO:0005016) develops from early contact of placental tissue from opposite sides of the ovary. Annotations for Arabidopsis should go under replum, not under ovary septum.
ovary wall [
PO:0005022; plant anatomy term ]
A wall of an ovary that is composed of abaxial (outer) and adaxial (inner) epidermis and a middle layer, composed of mesophyll cells and a distinct subepidermal adaxial cell layer (as found in Arabidopsis).
More Synonyms: pared del ovario (Spanish), 子房壁 (Japanese)
Comments:
ovule primordium [
PO:0000018; plant anatomy term ]
A floral structure primordium (PO:0025477) that is committed to the development of an ovule (PO:0020003).
More Synonyms: 胚珠原基(可視的) (Japanese), portion of ovule primordium tissue, primordio de óvulo (Spanish)
Comments: The transition from ovule primordium to ovule occurs when an integument (PO:0020021) begins to develop from the protoderm (PO:0006210).
ovuliferous scale ovule [
PO:0025491; plant anatomy term ]
A plant ovule (PO:0020006) that is part of an ovuliferous scale (add).
More Synonyms: óvulo de la escama ovulífera (Spanish), 種鱗胚珠 (Japanese)
Comments: Found in conifers.