DNA甲基化调解了过度放牧引起的克隆性跨代塑性
Jingjing Yin1, Weibo Ren2, Ellen L Fry3
1School of Ecology and Environment, Inner Mongolia University, Hohhot, China.
The Science of the total environment
|July 6, 2023
概括
过度放牧会导致植物的矮化,这可以通过表观遗传变化传给后代. 基因甲基化抑制了auxin通路,导致了Leymus chinensis的这种跨代化.
科学领域:
- 植物生物学 植物生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 生态生态学 生态生态学
背景情况:
- 过度放牧往往导致草原植物矮化.
- 这些矮体特征可以被克隆后代遗传.
- 跨代矮体遗传的确切机制尚未完全理解,但怀疑存在表观遗传修饰.
研究的目的:
- 调查DNA甲基化在莱姆斯chinensis的过度放牧诱导的矮体的跨代遗传中的作用.
- 探索DNA甲基化对辅酶含量和相关基因表达的影响,以应对过度放牧历史.
主要方法:
- 在温室实验中使用Leymus chinensis的克隆后代.
- 应用5-azacytidine (一种去甲基化剂) 来研究DNA甲基化效应.
- 测量植物生长,辅酶含量和辅酶相关基因的表达 (ARF7,ARF19,AZF2).
主要成果:
- 来自过度放牧的父母的克隆后代与非放牧对照相比,表现出矮体和减少的叶子auxin含量.
- 5-阿扎西丁治疗通常会增加辅素含量,促进过度放牧后代的生长,同时抑制非放牧后代的生长.
- 对于ARF7,ARF19和AZF2的基因表达模式反映了观察到的辅素含量趋势.
结论:
- 基因甲基化在莱姆斯人种 (Leymus chinensis) 过度放牧引起的跨代矮化中起着至关重要的作用.
- 过度放牧诱导的矮化是由通过DNA甲基化抑制auxin信号通路的介导.
- 表观遗传机制,特别是DNA甲基化,是了解植物对跨代环境压力的反应的关键.
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