Journal
MOLECULAR PLANT
Volume 2, Issue 3, Pages 478-486Publisher
CELL PRESS
DOI: 10.1093/mp/ssp018
Keywords
Abiotic; environmental stress; ABA; poikilohydry; Tortula ruralis; bryophytes; Physcomitrella patens
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Funding
- Washington University/Monsanto Plant Science Agreement
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The earliest land plants faced a suite of abiotic stresses largely unknown to their aquatic algal ancestors. The descendants of these plants evolved two general mechanisms for survival in the relatively arid aerial environment. While the vascular plants or 'tracheophytes' developed tissue specializations to transport and retain water, the other main lineages of land plants, the bryophytes, retained a simple, nonvascular morphology. The bryophytes-025EFmosses, hornworts, and liverworts-025EFcontinually undergo a co-equilibration of their water content with the surrounding environment and rely to a great extent on intrinsic cellular mechanisms to mitigate damage due to water stress. This short review will focus on the cellular and molecular responses to dehydration and rehydration in mosses, and offer insights into general plant responses to water stress.
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