Study on DNA Cytosine Methylation of Cotton (Gossypium hirsutum L.) Genome and Its Implication for Salt Tolerance

文献类型： 外文期刊

第一作者： ZHAO Yun-lei

作者： ZHAO Yun-lei;YU Shu-xun;YE Wu-wei;WANG Hong-mei;WANG Jun-juan;FANG Bao-xing

作者机构：

关键词： cotton;DNA methylation;salt stress;MSAP;methylation polymorphism

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2010 年 9 卷 6 期

页码：

收录情况： SCI

摘要： To study the relations between DNA methylation and abiotic stress responses in cotton (Gossypium hirsutum L.), the methylation-sensitive amplified polymorphism (MSAP) method was used to investigate the differences in methylation level and the change of cytosine methylation patterns under salt (NaCl) stress in two different salt-tolerant cotton lines The results showed that the number of the cytosine methylation of CCGG sites in high salt-tolerant cotton line was less than that in low salt-tolerant line Under salt stress, extensive cytosine methylation alterations including hypermethylation and demethylation as well as the potential conversion of methylation types occurred in the salt-treated cotton line compared with the corresponding control Interestingly, salt stress-induced demethylation loci that occurred in high salt-tolerant cotton line were greater than those in low salt-tolerant cotton line, however, salt stress-induced hypemethylation loci in the high salt-tolerant cotton line were less than those in low salt-tolerant cotton line It suggested that the demethylation positively contributed to salt tolerance and the hypermethylation had negative effect on salt tolerance in cotton

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