Comparative analysis of DNA methylation changes in two rice genotypes under salt stress and subsequent recovery

文献类型： 外文期刊

第一作者： Wang, Wensheng

作者： Wang, Wensheng;Huang, Fei;Qin, Qiao;Zhao, Xiuqin;Li, Zhikang;Fu, Binying;Li, Zhikang;Fu, Binying

作者机构：

关键词： DNA methylation;Salt tolerance;Epigenetic marker;Rice

期刊名称：BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS （ 影响因子：3.575； 五年影响因子：3.381 ）

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收录情况： SCI

摘要： DNA methylation, which is one of the best understood epigenetic phenomena, plays an important role in plant responses to environmental stimuli. The rice introgression line IL177-103 and its recurrent parent IR64, which show contrasting salt stress tolerance, were used to characterize DNA methylation changes under salt stress and subsequent recovery using methylation-sensitive amplified polymorphism (MSAP) analysis. The introgression line IL177-103 showed significantly improved tolerance to salinity, as represented by higher relative water content, endogenous abscisic acid content, activity of reactive oxygen species scavenging enzymes, and lower Na+ concentration in shoots, compared with IR64. The MSAP results showed that less than 10.5% of detected DNA methylation sites were genotype specific, in line with their similar genetic background. Salt-induced DNA methylation changes in both genotypes were mostly detected in roots, and the major portion of the salt-induced DNA demethylation/methylation alterations remained even after recovery, implying their inheritance in the present generation. Furthermore, a few sites with stable DNA methylation differences were identified between salt-tolerant IL177-103 and salt-sensitive IR64, thus providing genotype-specific epigenetic markers. Collectively, these results provide valuable data for further dissection of the molecular mechanisms of salt-stress response and tolerance in rice. (C) 2015 Elsevier Inc. All rights reserved.

分类号： Q5

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