nucellus

Term Information

Accession
PO:0020020
Aspect
plant anatomy
Synonyms
related: megasporangium
narrow: nucelli
narrow: Poaceae nucellus
narrow: Zea nucellus
alt_id: PO:0006462
alt_id: PO:0006492
exact: 珠心 (Japanese)
exact: nucelo (Spanish)
Definition
A megasporangium (PO:0025201) in a seed plant, composed of fleshy subepidermal tissue that is part of a plant ovule (PO:0020003) and surrounds a megasporocyte (PO:0000431). [source: POC:curators]
Comment
In seed plants, the megaspores and megagametophyte are retained within the nucellus. 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).

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External References

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