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压力颗粒的动力学决定了在热后应力适应期间的TOR活性和生长恢复
Zhaochen Zhong1,2, Suyun Yang1,2, Danmei Liu1,2
1College of Life Science, Fujian Provincial Key laboratory of Haixia Applied Plant Systems Biology, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian Province, China.
Science advances
|December 17, 2025
概括
拉巴胺素 (TOR) 信号的目标对植物中热诱导的压力颗粒 (SG) 形成并不重要. 然而,在热应激期间,TOR被隔离到SG中,SG拆卸调节了TOR的重新激活.
科学领域:
- 植物分子生物学 植物分子生物学
- 压力信号通道是压力信号通道.
- 细胞应激反应细胞应激反应
背景情况:
- 拉巴胺素 (TOR) 途径和压力颗粒 (SG) 的目标对生物体的应激适应和生存至关重要.
- 在工厂中,TOR信号和SG动态之间的精确相互作用尚未得到充分理解.
- 哺乳动物研究表明TOR在SG形成中的积极调节作用,与植物系统形成鲜明对比.
研究的目的:
- 为了研究拉巴胺素 (TOR) 信号的目标和压力颗粒 (SG) 动力学在热应激下的 * 阿拉比多普西斯 * 中之间的关系.
- 确定TOR信号在热引起的SG形成中的作用,以及热应激对TOR定位和活动的影响.
- 为了阐明调节TOR在减压后重新激活的机制.
主要方法:
- 利用 *Arabidopsis* 作为一个模型生物来研究热应激反应.
- 在热应力下研究了应力颗粒 (SG) 的形成和动态.
- 在热应激和恢复过程中监测了拉巴胺素 (TOR) 途径组件的点的定位和活性,包括RAPTOR1B和LST8.
主要成果:
- 拉巴amycin (TOR) 信号的目标是不可或缺的热诱导的压力颗粒 (SG) 在 * Arabidopsis * 形成,与哺乳动物不同.
- 热应激导致TOR及其相关蛋白质 (RAPTOR1B,LST8) 在SGS中被封存.
- 热应力独立于SG形成,抑制了TOR活动,其应力后的重新激活取决于SG拆卸速度.
结论:
- 揭示了植物中TOR信号的新型调节机制,与哺乳动物系统不同.
- 突出了在压力期间TOR在SG中的动态封存,以及SG拆卸在TOR重新激活中的关键作用.
- 建议调节SG动态可能是控制植物生长和增强应激适应的策略.
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