Abstract
Plasmatubules are specific (approximately 20 nm diameter) evaginations of the plasmalemma, found at sites where high solute flux from apoplast to symplast is known, or inferred, to occur for short periods. First described in the distal, endosperm, end of barley scutellar epithelial cells, their structure has subsequently been confirmed using a range of both aqueous and non‐aqueous fixation techniques. Plasmatubules have now been described in a range of tissues and species, and examination of published micrographs indicates that this range could be extended further.
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