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thallus

Term Information

Accession
PO:0030027
Name
thallus
Ontology
plant_anatomy
Synonyms
talo (Spanish, exact), thalli (exact, plural), 葉状体 (Japanese, exact), prothallium (broad)
Alternate IDs
None
Definition
A whole plant in the gametophytic phase that has a flat growth form and no distinct organs. Source: PO_REF:00001
Comment
A thallus is a gametophyte of liverworts and pteridophytes and develops from a short-lived protonema. Roughly two dimensional growth results from division of a single apical cell. Thalli may be ribbon or heart shaped or almost filamentous. Although there are no distinct organs, there may be tissue differentiation and dichotomous branching.
Subset
Pteridophytes
Bryophytes
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Graph of PO:0030027

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Parents of thallus (PO:0030027)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
thallus [RO:0000056 relation] RO:0000056  gametophyte development stage (PO:0028003)
thallus [is_a relation] is_a  whole plant (PO:0000003)
Children of thallus (PO:0030027)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
thallus meristematic apical cell (PO:0030025) [BFO:0000050 relation] BFO:0000050  thallus
PO_GIT
317