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DNA Methylation Changes Induced in Rice by Exposure to High Concentrations of the Nitric Oxide Modulator, Sodium Nitroprusside

文献类型： 外文期刊

作者： Ou, Xiufang 1 ; Zhuang, Tingting 1 ; Yin, Wenchao 1 ; Miao, Yiling 1 ; Wang, Bo 1 ; Zhang, Yunhong 1 ; Lin, Xiuyun 1 ; Xu 1 ;

作者机构： 1.NE Normal Univ, Key Lab Mol Epigenet MOE, Changchun, Peoples R China

2.Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

3.Jilin Acad Agr Sci, Changchun, Peoples R China

4.Washington State Univ, Sch Mol Biosci, Dept Crop & Soil Sci, Pullman, WA 99164 USA

5.Washington State Univ, Ctr Reprod Biol, Pullman, WA 99164 USA

6.Washington State Univ, Ctr Reprod Bi

关键词： Nitric oxide;DNA methylation;Gene expression;Rice

期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Nitric oxide (NO) is a signaling molecule that participates at physiological concentrations in diverse regulatory pathways. However, when NO concentration reaches levels higher than normal, it is sensed as a stress, which results in epigenetic alterations and chromatin remodeling in plants. Here, we showed that exposure to 0.5 mM of sodium nitroprusside (SNP), a NO donor, induces stress symptoms in rice seedlings that result in complete growth inhibition. Moreover, these stress symptoms in SNP-treated plants were found to be associated with methylation changes in genomic DNA, which predominantly involve hypomethylation at the CHG sites. Concomitant with these changes, transcriptional activation of a number of genes and transposable elements (TEs) was also observed. Further analysis revealed that expression of four genes, Chromomethylase 3 (OsCMT3), deficient in DNA methylation 1 (OsDDM1a), OsDDM1b, and DEMETER (OsDME), involved in chromatin remodeling and DNA methylation homoeostasis have been specifically perturbed.

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