NO是植物应激反应的信号分子

根据NO的性质和可能的产生途径，略述了生物胁迫(病原菌侵害)和干旱胁迫、盐胁迫、极端温度、机械损伤、臭氧和紫外辐射等各种非生物胁迫信号与NO信号分子的偶联及其信号的级联途径，概括了NO可能介导的生物过程，讨论了NO通过其下游信号过程对与细胞的生理影响以及该下游信号过程所涉及到的cGMP、cADPR的产生和NO与其它信号分子(ROS、SA、ABA等)的协同作用，表明胁迫诱导的NO爆发是激发、启动和装备植物细胞的重要信号级联环节，这个环节能使植物细胞处于应激状态，并迅速作出反应，形成一系列适应机制。

Nitric oxide(NO) is a signaling molecule of plant irritability response to environment

Recently, nitric oxide (NO) emerged as a key signalling molecule in plants has been paid large attention to it by a lot of experts. Here we outline how the biotic and abiotic stresses, including pathogen invading and drought, salinity, temperature extreme, mechanical damage, ozone and ultraviolet etc, were coupled with NO signaling molecule in plant cell as well as their cascade pathways in signaling transduction. The review covers the biological processes likely to be mediated by NO, and discuss the downstream signalling processes by which NO exerts its cellular physiological effects. Intracellular signalling responses to NO involve generation of cGMP, cADPR, and NO synergetic function with other signaling molecules, such as ROS, SA, ABA and so on. It is indicated that the NO burst induced by various stress is an important component of signaling cascade pathway in activating, priming and preparing plant cell. This enable plant cell to be excitable or irritable and rapidly response to these stresses, Ultimately, induce the adaptive plasticity to different environments.