Poikilohydry is the capacity to tolerate dehydration to low cell or tissue water content and to recover from it without physiological damage. This condition occurs in such organisms as the lichens and bryophytes that lack mechanisms, such as a waterproofing cuticle and stomata that can help to prevent desiccation. The vascular plants have largely lost the capacity to tolerate dehydration.
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References:
- Poikilohydry at Wikipedia. Accessed 19 July 2015.
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