Plant Ontology (PO)
OWL
Last submission date April 18, 2024
ID http://purl.obolibrary.org/obo/PO_0025127
http://purl.obolibrary.org/obo/PO_0025127
https://agroportal.lirmm.fr/ontologies/PO/PO_0025127
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Preferred name

primordium

Synonyms
portion of primordial tissue (exact) portion of primordium tissue (exact) primordia (exact, plural) primordio (Spanish, exact) 原基(可視的) (Japanese, exact)
Definitions
A primordium appears as a protrusion and is the first distinct form of a plant organ (PO:0009008), cardinal organ part (PO:0025001), or collective plant organ structure (PO:0025007). The transition from a primordium to the plant structure it develops into is marked by the development of non-meristematic cells, although meristematic cells may be present after the transition. A portion of meristem tissue (PO:0009013) that has as parts protoderm (PO:0006210) and sub-epidermal meristematic tissue and is committed to the development of a particular plant structure (PO:0009011).
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