A companion cell (PO:0000400) that has dense cytoplasm, a small vacuole, proplastids rather than chloroplasts, and abundant and highly branched plasmodesmata linking it to adjacent mesophyll cells.
Source:PMID:21669666,
PO_REF:00011
Comment
Intermediary companion cells translocate high concentrations of raffinose-family oligosaccharides and are found in plants that use symplastic phloem loading. Unlike sieve tube elements (PO:0000289), intermediary companion cells retain their nuclei and other organelles at maturity.
Subset
None
Related
Link
to all annotated objects annotated to intermediary companion cell.
Link
to all direct and indirect annotations
to intermediary companion cell.
Link
to all direct and indirect annotations download (limited to first 10,000)
for intermediary companion cell.
Feedback
Comments, changes to terms, or requests for new ontology terms can be made at PO issue tracker on GitHub.