Department of Biological and Environmental Sciences, University of Helsinki, PO Box 65 (Viikinkaari 1), FIN-00014 Helsinki, Finland.
Physiol Plant. 2010 Apr;138(4):405-13. doi: 10.1111/j.1399-3054.2009.01321.x. Epub 2009 Nov 9.
Reactive oxygen species (ROS) are known to accumulate during abiotic stresses, and different cellular compartments respond to them by distinctive profiles of ROS formation. In contrast to earlier views, it is becoming increasingly evident that even during stress, ROS production is not necessarily a symptom of cellular dysfunction but might represent a necessary signal in adjusting the cellular machinery to the altered conditions. ROS can modulate many signal transduction pathways, such as mitogen-activated protein kinase cascades, and ultimately influence the activity of transcription factors. However, the picture of ROS-mediated signaling is still fragmentary and the issues of ROS perception as well as the signaling specificity remain open. Here, we review some of the recent advances in plant abiotic stress signaling with emphasis on processes known to be affected heavily by ROS.
活性氧（ROS）在非生物胁迫下会积累，不同的细胞区室通过独特的 ROS 形成模式来应对它们。与早期的观点相反，越来越明显的是，即使在胁迫下，ROS 的产生也不一定是细胞功能障碍的症状，而可能代表着一种调整细胞机制以适应变化条件的必要信号。ROS 可以调节许多信号转导途径，如丝裂原激活蛋白激酶级联反应，最终影响转录因子的活性。然而，ROS 介导的信号转导的情况仍然很零碎，ROS 感知以及信号特异性的问题仍然没有解决。在这里，我们回顾了一些最近在植物非生物胁迫信号转导方面的进展，重点介绍了那些已知受 ROS 影响很大的过程。
