Planteome: Term Details for "protonema" (PO:0030003)

Accession: PO:0030003
Name: protonema
Ontology: plant_anatomy
Synonyms: portion of protonema tissue (exact), protonema (Spanish, exact), protonemata (exact, plural), 原糸体 (Japanese, exact)
Alternate IDs: None
Definition: A portion of chlorenchyma tissue that develops directly from a spore and grows by division of an apical cell to form filaments that are one cell wide and dichotomously branching. Source: POC:Ramona_Walls
Comment: The protonema is the first structure that develops in the gametophytic phase of mosses, some other bryophytes, and leptosporangiate ferns. The term protonema is also used to refer to the phase of development in which protonemal tissue is produced (see PO:0030006 protonema phase). In some species of moss, the protonema is perennial. A protonema may develop from sporophytic tissue during apospory.
Subset: Pteridophytes; Bryophytes
Related: Link to all annotated objects annotated to protonema.; Link to all direct and indirect annotations to protonema.; Link to all direct and indirect annotations download (limited to first 10,000) for protonema.
Feedback: Comments, changes to terms, or requests for new ontology terms can be made at PO issue tracker on GitHub.

subject	relation	object
protonema	is_a	chlorenchyma (PO:0005426)
protonema	RO:0000056	gametophyte development stage (PO:0028003)
protonema	RO:0002202	plant spore (PO:0025017)

subject	relation	object
protonema side branch initial cell (PO:0030067)	BFO:0000050	protonema
chloronema (PO:0030004)	is_a	protonema
caulonema (PO:0030005)	is_a	protonema
protonema meristematic apical cell (PO:0030046)	BFO:0000050	protonema