intermediary companion cell
Term Information
- Accession
- PO:0025460
- Aspect
- plant anatomy
- Synonyms
- exact: célula intermediaria acompañante (Spanish)
- exact: intermediary cell
- exact: 中間伴細胞 (Japanese)
- Definition
- 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.
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