线粒体ROS触发器官间细胞信号和主要ER过程,以建立增强的植物免疫力
Yang Yang1,2, Yan Zhao1, Wei Zhao1
1State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China.
线粒体反应性氧物种 (ROS) 启动植物对病原体的免疫反应. 一个新的线粒体-ER信号级联,独立于其他ROS源,对于植物防御至关重要.
科学领域:
- 植物生物学 植物生物学
- 植物免疫力 植物免疫力
- 细胞信号传输 细胞信号传输
背景情况:
- 活性氧物种 (ROS) 是植物中的重要信号分子,参与发育和免疫.
- 目前关于植物免疫中的ROS的研究主要集中在亚塑性和塑性来源上.
- 线粒体ROS (mROS) 在植物免疫力中的作用仍然不太清楚.
研究的目的:
- 为了研究线粒体ROS (mROS) 在植物病原体相互作用中的功能.
- 描述mROS的动态,特别是H2O2,并确定器官间接触点.
- 阐明mROS在植物防御对虫病原体*Phytophthora parasitica*的作用.
主要方法:
- 利用基因编码的传感器和光标记器来跟踪mROS动态.
- 采用遗传方法来识别器官间接触点.
- 在病原体攻击期间,研究了线粒体和内质网膜 (ER) 之间的信号级联.
主要成果:
- 发现了一种新的线粒体-ER ROS信号级联,该级联可以独立于阿波塑性和塑性ROS运行.
- 发现mROS可以启动对*Phytophthora parasitica*的免疫反应.
- 观察到增强的线粒体-ER膜关联,促进mROS信号传输并触发未折叠的蛋白质反应.
结论:
- 线粒体ROS在植物免疫力中起着关键的,以前被低估的作用.
- 线粒体-ER膜接触点对于mROS信号的传播和植物防御机制的启动至关重要.
- 通过线粒体-ER膜向ER光层传递mROS是植物防御的关键组成部分.
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