营养驱动的TOR信号控制着一种与染色质相关的复合体,用于调节植物生长和承受应激的耐力
Xin Wang1,2, Zhen-Zhen Liu2, Dan-Yang Yuan2
1College of Life Sciences, Beijing Normal University, Beijing, China.
Nature plants
|September 26, 2025
概括
拉帕素 (TOR) 途径的标通过控制染色素相关生长复合物 (CACG) 来调节植物生长. 这种复杂的平衡增长和应激耐受性,基于营养的可用性.
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.
- 营养信号传递 营养信号传递
背景情况:
- 拉帕素 (TOR) 激酶的标集成营养和环境信号,以控制真核生物的生长.
- 通过TOR影响色素和基因表达的精确机制在很大程度上是未知的.
研究的目的:
- 调查TOR在调节染色质和基因表达中的作用,以应对营养的可用性.
- 确定参与植物中TOR介导的生长和应激反应的新型蛋白质复合体.
主要方法:
- 在Arabidopsis thaliana中识别和表征染色素相关生长复合物 (CACG).
- 对CACG成分与应激反应基因和基因组修饰的相互作用进行分析.
- 对CACG mRNA转化TOR-依赖调节的研究.
主要成果:
- 活性TOR激酶在富含营养的条件下促进CACG mRNA转化,导致压抑应激基因和增强生长.
- 不活跃的TOR激酶在营养缺乏条件下减少CACG mRNA转化,缓解抑制并增加压力耐受性.
- CACG成分与乙化,应激反应基因结合,调解TOR-依赖的转录控制.
结论:
- 该CACG复合体作为一个关键的营养响应转录调节器.
- CACG以TOR-依赖的方式协调植物生长和应激耐受性.
- 了解这种机制可能有助于开发具有更好的产量和抗压能力的作物.
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