Term Information

Accession
PO:0020020
Name
nucellus
Ontology
plant_anatomy
Synonyms
nucelo (Spanish, exact), 珠心 (Japanese, exact), megasporangium (related), Poaceae nucellus (narrow), Zea nucellus (narrow), nucelli (narrow)
Alternate IDs
PO:0006462, PO:0006492
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).
Subset
reference
TraitNet
Feedback
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Comments, changes to terms, or requests for new ontology terms can be made at PO issue tracker on GitHub.

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Parents of nucellus (PO:0020020)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
nucellus [is_a relation] is_a  megasporangium (PO:0025201)
nucellus [BFO:0000050 relation] BFO:0000050  plant ovule (PO:0020003)
Children of nucellus (PO:0020020)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
fruit nucellus (PO:0008005) [is_a relation] is_a  nucellus
nucellar epidermis (PO:0008006) [BFO:0000050 relation] BFO:0000050  nucellus
nucellar projection (PO:0008007) [BFO:0000050 relation] BFO:0000050  nucellus
PO_GIT
49
149
253