Journal
TRENDS IN PLANT SCIENCE
Volume 17, Issue 4, Pages 221-229Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2012.01.009
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Funding
- German Research Foundation (DFG) [SPP1108, GK1342, SFB567]
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During stress, plant cells activate anion channels and trigger the release of anions across the plasma membrane. Recently, two new gene families have been identified that encode major groups of anion channels. The SLAC/SLAH channels are characterized by slow voltage-dependent activation (S-type), whereas ALMT genes encode rapid-activating channels (R-type). Both S- and R-type channels are stimulated in guard cells by the stress hormone ABA, which leads to stomatal closure. Besides their role in ABA-dependent stomatal movement, anion channels are also activated by biotic stress factors such as microbe-associated molecular patterns (MAMPs). Given that anion channels occur throughout the plant kingdom, they are likely to serve a general function as master switches of stress responses.
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