机械伤害处理橡胶树萌条树皮的DNA甲基化分析
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国家天然橡胶产业技术体系岗位科学家(CARS34YZ1);


DNA Methylation Analysis of Barks of Epicormic Shoots Treated With Mechanical Wounding in Rubber Trees
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    摘要:

    该研究采用甲基化敏感扩增多态性技术,分析了机械伤害处理橡胶树萌条树皮的DNA甲基化的变化。结果显示:(1)与对照相比,伤害后0.5和2 h,DNA甲基化水平略有上升;伤害后48 h的DNA甲基化水平出现了较大幅度的下降。(2)甲基化变化类型分析表明,在伤害2 h主要发生了DNA的甲基化;伤害后48 h,主要发生了DNA的去甲基化。(3)差异甲基化位点的回收、测序及注释表明,ATP合酶F1亚基1、磷酸核糖胺甘氨酸类连接酶、冷激结构域蛋白3、光系统II 47 kD 蛋白、E3泛素蛋白连接酶RING1、NADH泛醌氧化还原酶和一些假定蛋白参与了伤害的响应。(4)经重亚硫酸盐测序验证,ATP合酶F1亚基1和NADH泛醌氧化还原酶的CCGG位点发生了去甲基化。研究推断DNA的甲基化可能参与了橡胶树萌条对机械伤害的响应。

    Abstract:

    In the present study, the changes of DNA methylation in the barks of epicormic shoots which treated with mechanical wounding in rubber tree were analyzed by methylationsensitive amplification polymorphism (MSAP). The results showed that:(1) in comparison with the control, the levels of DNA methylation were slightly increased at the time point of 0.5 and 2 hours after mechanical wounding. And the larger decrease of DNA methylation levels were observed at 48 hours after mechanical wounding. (2)The main DNA methylation and demethylation events were occurred at 2 and 48 hours, respectively. (3)ATP synthase F1 subunit 1, phosphoribosylamineglycine ligaselike, cold shock domaincontaining protein 3, photosystem II 47 kD protein, E3 ubiquitinprotein ligase RING1, NADHubiquinone oxidoreductase and some hypothetical protein were identified from the differentially methylated sites induced by mechanical wounding. (4)Bisulfite sequencing showed that the both CCGG sites of ATP synthase F1 subunit 1 and NADHubiquinone oxidoreductase were hypomethylated inducing by mechanical wounding. Therefore, the results suggested the DNA methylation may involved in the response of mechanical wounding in epicormic shoots of rubber trees.

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吴绍华,张世鑫,田维敏.机械伤害处理橡胶树萌条树皮的DNA甲基化分析[J].西北植物学报,2018,38(12):2249-2256

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  • 在线发布日期: 2019-01-24
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