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The global dynamic of DNA methylation in response to heat stress revealed epigenetic mechanism of heat acclimation in Saccharina japonica

文献类型： 外文期刊

作者： Liu, Fuli 1 ; Zhang, Pengyan 3 ; Liang, Zhourui 3 ; Yuan, Yanmin 3 ; Liu, Yi 3 ; Wu, Yukun 3 ;

作者机构： 1.Ocean Univ China, Key Lab Marine Genet & Breeding, Minist Educ, Qingdao, Peoples R China

2.Ocean Univ China, Coll Marine Life Sci, Qingdao, Peoples R China

3.Chinese Acad Fishery Sci, Key Lab Sustainable Dev Marine Fisheries, Minist Agr, Qingdao, Peoples R China

4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao, Peoples R China

关键词： differentially expressed gene; DNA methylation; heat stress; RNA-seq; Saccharina japonica; whole-genome bisulfite sequencing

期刊名称：JOURNAL OF PHYCOLOGY （ 影响因子：2.9； 五年影响因子：2.8 ）

ISSN： 0022-3646

年卷期： 2023 年 59 卷 1 期

页码：

收录情况： SCI

摘要： Saccharina japonica is an ecologically and economically important kelp in cold-temperate regions. When it is cultivated on a large scale in the temperate and even subtropical zones, heat stress is a frequent abiotic stress. This study is the first attempt to reveal the regulatory mechanism of the response to heat stress from the perspective of DNA methylation in S. japonica. We firstly obtained the characteristics of variation in the methylome under heat stress, and observed that heat stress caused a slight increase in the overall methylation level and methylation rate, especially in the non-coding regions of the genome. Secondly, we noted that methylation was probably one of factors affecting the expression of genes, and that methylation within the gene body was positively correlated with the gene expression (rho = 0.0784). Moreover, it was found that among the differentially expressed genes regulated by methylation, many genes were related to heat stress response, such as HSP gene family, genes of antioxidant enzymes, genes related to proteasome-ubiquitination pathway, and plant cell signaling pathways. This study demonstrated that DNA methylation is involved in regulating the response to heat stress, laying a foundation for studying the acclimation and adaptation of S. japonica to heat stress from an epigenetic perspective.

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