Negative regulation of abscisic acid-induced stomatal closure by glutathione in Arabidopsis

被引:59
作者
Okuma, Eiji [1 ]
Jahan, Md Sarwar [1 ]
Munemasa, Shintaro [1 ]
Hossain, Mohammad Anowar [1 ]
Muroyama, Daichi [1 ]
Islam, Mohammad Mahbub [1 ]
Ogawa, Ken'ichi [2 ]
Watanabe-Sugimoto, Megumi [1 ]
Nakamura, Yoshimasa [1 ]
Shimoishi, Yasuaki [1 ]
Mori, Izumi C. [3 ]
Murata, Yoshiyuki [1 ]
机构
[1] Okayama Univ, Grad Sch Nat Sci & Technol, Div Biosci, Okayama 7008530, Japan
[2] Res Inst Biol Sci, Kibichuo, Okayama 7161241, Japan
[3] Okayama Univ, Inst Plant Sci & Resources, Okayama 7100046, Japan
基金
日本学术振兴会;
关键词
Abscisic acid; Cytosolic calcium; Glutathione; Reactive oxygen species; Stomatal closure; COMMELINA GUARD-CELLS; NITRIC-OXIDE; SIGNAL-TRANSDUCTION; HYDROGEN-PEROXIDE; METHYL JASMONATE; STRESS RESPONSES; PLASMA-MEMBRANE; CA2+ CHANNELS; CALCIUM; OXYGEN;
D O I
10.1016/j.jplph.2011.06.002
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
We found that glutathione (GSH) is involved in abscisic acid (ABA)-induced stomatal closure. Regulation of ABA signaling by GSH in guard cells was investigated using an Arabidopsis mutant. cad2-1. that is deficient in the first GSH biosynthesis enzyme, gamma-glutamylcysteine synthetase, and a GSH-decreasing chemical, 1-chloro-2,4-dinitrobenzene (CDNB). Glutathione contents in guard cells decreased along with ABA-induced stomata! closure. Decreasing GSH by both the cad2-1 mutation and CDNB treatment enhanced ABA-induced stomata! closure. Glutathione monoethyl ester (GSHmee) restored the GSH level in cad2-1 guard cells and complemented the stomatal phenotype of the mutant. Depletion of GSH did not significantly increase ABA-induced production of reactive oxygen species in guard cells and GSH did not affect either activation of plasma membrane Ca2+-permeable channel currents by ABA or oscillation of the cytosolic free Ca2+ concentration induced by ABA. These results indicate that GSH negatively modulates a signal component other than ROS production and Ca2+ oscillation in ABA signal pathway of Arabidopsis guard cells. (C) 2011 Elsevier GmbH. All rights reserved.
引用
收藏
页码:2048 / 2055
页数:8
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