Plastids and pathogens: mechanosensitive channels and survival in a hypoosmotic world.

Plant Signaling & Behavior
Kira M Veley, Elizabeth S Haswell

Abstract

In bacteria, MscS-type mechanosensitive channels serve to protect cells from lysis as they swell during extreme osmotic stress. We recently showed that two MscS homologs from Arabidopsis thaliana serve a similar purpose in the epidermal plastids of the leaf, indicating that the plant cell cytoplasm can present a dynamic osmotic challenge to the plastid. MscS homologs are predicted to be targeted to both plastids and mitochondrial envelopes and have been found in the genomes of intracellular pathogens. Here we discuss the implications of these observations, and propose that MS channels provide an essential mechanism for osmotic adaptation to both intracellular and the extracellular environments.

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Citations

Jul 6, 2014·Oecologia·H M Appel, R B Cocroft
Apr 14, 2015·Current Opinion in Cell Biology·Maryse A Block, Juliette Jouhet
Jan 17, 2015·Cell Calcium·Ian R BoothLaura Lehtovirta-Morley
Aug 21, 2013·Biochemistry·Margaret E WilsonElizabeth S Haswell
May 14, 2014·Pflügers Archiv : European journal of physiology·C D CoxB Martinac

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