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Dynamic Changes in Genome-Wide Histone3 Lysine27 Trimethylation and Gene Expression of Soybean Roots in Response to Salt Stress

文献类型： 外文期刊

作者： Sun, Lei 1 ; Song, Guangshu 3 ; Guo, Weijun 4 ; Wang, Weixuan 4 ; Zhao, Hongkun 2 ; Gao, Tingting 3 ; Lv, Qingxue 3 ; Yan 1 ;

作者机构： 1.Northeast Agr Univ, Coll Agr, Harbin, Heilongjiang, Peoples R China

2.Jilin Acad Agr Sci, Soybean Res Inst, Changchun, Jilin, Peoples R China

3.Jilin Acad Agr Sci, Maize Res Inst, Gongzhuling, Peoples R China

4.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing, Peoples R China

关键词： salt stress; RNA-seq; ChIP-seq; histone methylation; histone modifiers; soybean

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2019 年 10 卷

页码：

收录情况： SCI

摘要： Soybean is an important economic crop for human diet, animal feeds and biodiesel due to high protein and oil content. Its productivity is significantly hampered by salt stress, which impairs plant growth and development by affecting gene expression, in part, through epigenetic modification of chromatin status. However, little is known about epigenetic regulation of stress response in soybean roots. Here, we used RNA-seq and ChIP-seq technologies to study the dynamics of genome-wide transcription and histone methylation patterns in soybean roots under salt stress. Eight thousand seven hundred ninety eight soybean genes changed their expression under salt stress treatment. Whole-genome ChIP-seq study of an epigenetic repressive mark, histone H3 lysine 27 trimethylation (H3K27me3), revealed the changes in H3K27me3 deposition during the response to salt stress. Unexpectedly, we found that most of the inactivation of genes under salt stress is strongly correlated with the de novo establishment of H3K27me3 in various parts of the promoter or coding regions where there is no H3K27me3 in control plants. In addition, the soybean histone modifiers were identified which may contribute to de novo histone methylation and gene silencing under salt stress. Thus, dynamic chromatin regulation, switch between active and inactive modes, occur at target loci in order to respond to salt stress in soybean. Our analysis demonstrates histone methylation modifications are correlated with the activation or inactivation of salt-inducible genes in soybean roots.

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