在Medicago truncatula体质胚胎发生期间的全基因组甲基化景观揭示了Tnt1逆转换和过度活跃的甲基化区域之间的相关性
Raja Sekhar Nandety1,2,3, Sunhee Oh1, Hee-Kyung Lee1
1Noble Research Institute, Ardmore, Oklahoma, 73401, USA.
The Plant journal : for cell and molecular biology
|April 17, 2024
概括
在Medicago truncatula中,体体胚生成涉及到动态的DNA甲基化转移,特别是在促进体区域. Tnt1逆转换与这些高甲基化事件相关,影响基因表达和代谢途径.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 豆类基因组学 豆类基因组学
背景情况:
- 梅迪卡戈 (Medicago truncatula) 是研究植物生物学和固化的关键型号豆类.
- 使用Tnt1逆转移子,在M. truncatula R108.8中创建了广泛的插入突变系.
- 实体胚生成 (SE) 是植物的一个关键的发育过程,其特点是显著的表观遗传修饰.
研究的目的:
- 为了研究在Medicago truncatula体质胚胎发生过程中DNA甲基化中的动态变化.
- 探索Tnt1逆转换和甲基化模式之间的关系.
- 为了确定受SE期间甲基化转移影响的基因和途径.
主要方法:
- 使用M. truncatula R108的叶子扩展剂来诱导体质胚胎发生.
- 在不同发育阶段 (叶子,,胚胎生成) 进行了DNA甲基化分析.
- 采用了全基因组双硫酸盐测序和基因表达分析.
主要成果:
- 与对照组相比,在SE期间细胞蛋白甲基化 (CG,CHG,CHH) 显著增加.
- 促进区域的甲基化水平较高,而非转化区域的甲基化水平最低.
- 在差异甲基化区域 (DMR) 和Tnt1插入部位之间发现了强烈的相关性 (89.71%).
- 基因的高甲基化与Tnt1插入的数量正相关.
- 在DMR和基因表达之间观察到促进物甲基化和基因表达之间的反向关系.
- 丰富的途径包括信号处理,ATP水解,RNA聚合酶活性,运输,二次代谢物和代谢.
结论:
- 在M. truncatula中,体体胚生成涉及动态的CG,CHG和CHH甲基化转移.
- 在SE过程中,Tnt1逆转换与高甲基化区域有关.
- 这些表观遗传变化影响基因表达,并与重要的代谢和发育途径有关.
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