Experimental Factor Ontology (EFO)
OWL
Last submission date June 16, 2025
ID http://purl.obolibrary.org/obo/PO_0025279
http://purl.obolibrary.org/obo/PO_0025279
https://agroportal.lirmm.fr/ontologies/EFO/PO_0025279
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Preferred name

megagametophyte

Definitions
Megagametophytes in bryophytes only produce egg cells, but do not develop from megaspores, because there is no heterospory in bryophytes. In some pteridophytes, megagametophytes develop from megaspores. In angiosperms, Gnetum, and Weltwischia, the megagametophyte is greatly reduced. The megagametophyte in angiosperms is an embryo sac. A whole plant in the gametophyte development stage (PO:0028003) that produces only plant egg cells (PO:0020094).
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