We isolated the Arabidopsis drought-resistant mutant csm1-1 and cloned the CSM1 gene (previously called RCI3) which encodes a kind of peroxidase. In this study, we showed that the mutant csm1-1 was more tolerant to selenium (Se) stress than the wild-type, and that the mutant csm1-1 accumulated similar Se content compared with the wild-type when subjected to Se stress. Further analysis revealed that the Se resistance of mutant csm1-1 was associated, at least in part, with the enhanced activities of antioxidant enzymes GSH-POD (glutathione peroxidase) and POD (peroxidase). In addition, enhanced Se resistance of the mutant csm1-1 was partially GSH dependent, which was related to the higher expression level of GSH1 gene involved in GSH synthesis and consequently increased GSH content.
Russian Journal of Plant Physiology – Springer Journals
Published: Aug 14, 2015
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