活性氧诱发的植物亚细胞间通讯

The Subcellular Communication Driven by Reactive Oxygen Species in Plants

在正常发育和应激条件下,活性氧(reactive oxygen species,ROS)均会在植物细胞的不同细胞器中产生,如线粒体呼吸作用和叶绿体光合作用都是ROS的重要来源。ROS虽然对细胞存在潜在的毒害,但是适量的ROS可以作为信号分子激活信号传导通路引起细胞器内多种生理反应,从而协调亚细胞器的代谢功能及相互作用。尽管这些过程已被广泛研究,但ROS在植物亚细胞器间的通讯过程所发挥的作用则相对零散。综述了ROS的种类及其产生途径,重点介绍了植物细胞如何感知并响应ROS以及细胞器间的ROS信号传递过程。这些结果将有助于理解ROS作为信号分子在线粒体、叶绿体和细胞核信号交流中的作用。

Reactive oxygen species(ROS)are produced in different organelles in plants under both normal and stress conditions,such as the ROS production by respiration in mitochondria and photosynthesis in chloroplast.Although ROS are potentially toxic to cells,they can act as signaling molecules to activate signaling transduction network to trigger the physiological reactions inside organelles,thus to coordinate the metabolic functions and interactions in sub-organelles.Though these processes have been extensively studied,the role of ROS in plant subcellular communication has been sporadic.This article reviews the types of ROS and how they are produced.Particularly,how plant cells perceive and respond to ROS and how they transmit signals between and within cells are summarized.It will be conducive to understanding the role of ROS as signaling molecules in the communication among mitochondria,chloroplasts and nucleus.