Oxidative stress-induced calcium signaling in Arabidopsis

Plant Physiology
Maike C Rentel, M R Knight

Abstract

Many environmental stresses result in increased generation of active oxygen species in plant cells. This leads to the induction of protective mechanisms, including changes in gene expression, which lead to antioxidant activity, the recovery of redox balance, and recovery from damage/toxicity. Relatively little is known about the signaling events that link perception of increased active oxygen species levels to gene expression in plants. We have investigated the role of calcium signaling in H2O2-induced expression of the GLUTATHIONE-S-TRANSFERASE1 (GST1) gene. Challenge with H2O2 triggered a biphasic Ca2+ elevation in Arabidopsis seedlings. The early Ca2+ peak localized to the cotyledons, whereas the late Ca2+ rise was restricted to the root. The two phases of the Ca2+ response were independent of each other, as shown by severing shoot from root tissues before H2O2 challenge. Modulation of the height of Ca2+ rises had a corresponding effect upon H2O2-induced GST1 expression. Application of the calcium channel blocker lanthanum reduced the height of the first Ca2+ peak and concomitantly inhibited GST1 expression. Conversely, enhancing the height of the H2O2-triggered Ca2+ signature by treatment with L-buthionine-[S,R]-sulfoximine...Continue Reading

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Citations

Dec 15, 2010·Plant Cell Reports·Hrishikesh UpadhyayaBiman Kumar Dutta
Dec 25, 2008·Proceedings of the National Academy of Sciences of the United States of America·Rubén AlcázarMatthieu Reymond
Jun 19, 2012·AoB Plants·Veselin Dimitrov Petrov, Frank Van Breusegem
Oct 4, 2011·Journal of Experimental Botany·Daniel LaporteLoreto Holuigue
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May 7, 2011·Plant Physiology·Martin SchäferIan T Baldwin
May 3, 2005·Annual Review of Plant Biology·Nicolas BouchéHillel Fromm
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Jan 1, 2014·Plants·Julia M Davies
May 27, 2014·Journal of Chemical Ecology·Jyothilakshmi VadasseryAxel Mithöfer
Sep 19, 2014·Plant & Cell Physiology·Jens MaintzRalph Panstruga
Jun 7, 2013·Metallomics : Integrated Biometal Science·Giovanni DalCorsoAntonella Furini
Jan 6, 2005·The Journal of Cell Biology·Tsanko S Gechev, Jacques Hille
Sep 1, 2015·The New Phytologist·Kwang-Moon ChoSung Han Ok
May 26, 2012·Journal of Genetics and Genomics = Yi Chuan Xue Bao·Zhen PanYan Guo
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