A companion cell (PO:0000400) that lacks cell wall invaginations and has few or no plasmodesmata connecting it to adjacent mesophyll cells.
Source:PMID:21669666,
PO_REF:00011
Comment
Found in plants that use apoplastic phloem loading. Unlike sieve tube elements (PO:0000289), ordinary companion cells retain their nuclei and other organelles at maturity.
Subset
None
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