Cyclic mononucleotides modulate potassium and calcium flux responses to H2O2 in Arabidopsis roots
AuthorsOrdoñez, Natalia Maria
Gehring, Christoph A
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Bioscience Core Lab
Permanent link to this recordhttp://hdl.handle.net/10754/552388
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AbstractCyclic mononucleotides are messengers in plant stress responses. Here we show that hydrogen peroxide (H2O2) induces rapid net K+-efflux and Ca2+-influx in Arabidopsis roots. Pre-treatment with either 10 μM cAMP or cGMP for 1 or 24 h does significantly reduce net K+-leakage and Ca2+-influx, and in the case of the K+-fluxes, the cell permeant cyclic mononucleotides are more effective. We also examined the effect of 10 μM of the cell permeant 8-Br-cGMP on the Arabidopsis microsomal proteome and noted a specific increase in proteins with a role in stress responses and ion transport, suggesting that cGMP is sufficient to directly and/or indirectly induce complex adaptive changes to cellular stresses induced by H2O2. © 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
CitationCyclic mononucleotides modulate potassium and calcium flux responses to H2O2 in Arabidopsis roots 2014, 588 (6):1008 FEBS Letters
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