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protophloem

Term Information

Accession
PO:0006077
Name
protophloem
Ontology
plant_anatomy
Synonyms
portion of protophloem tissue (exact), protofloema (Spanish, exact), 原生師部 (Japanese, exact)
Alternate IDs
None
Definition
A portion of primary phloem (PO:0006075) tissue has as parts the first-formed sieve elements (PO:0025406) at a particular location and does not have companion cells (PO:0000071, in angiosperms) or albuminous cells (PO:0025412, in gymnosperms) associated with the sieve elements. Source: ISBN:0471245194, POC:curators
Comment
Protophloem is the first primary phloem to develop in any particular location in a portion of vascular tissue (PO:0009015). Sieve elements in the protophloem are smaller than in the metaphloem (PO:0006076). The protophloem usually only lasts a short time before it is replaced by metaphloem.
Subset
None
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Graph of PO:0006077

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Parents of protophloem (PO:0006077)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
protophloem [is_a relation] is_a  primary phloem (PO:0006075)

This term has no children.

PO_GIT
433