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首页> 外文期刊>Journal of Experimental Botany >Nitric oxide function and signalling in plant disease resistance.
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Nitric oxide function and signalling in plant disease resistance.

机译:一氧化氮的功能和信号传导对植物的抗病性。

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摘要

Nitric oxide (NO) is one of only a handful of gaseous signalling molecules. Its discovery as the endothelium-derived relaxing factor (EDRF) by Ignarro revolutionized how NO and cognate reactive nitrogen intermediates, which were previously considered to be toxic molecules, are viewed. NO is now emerging as a key signalling molecule in plants, where it orchestrates a plethora of cellular activities associated with growth, development, and environmental interactions. Prominent among these is its function in plant hypersensitive cell death and disease resistance. While a number of sources for NO biosynthesis have been proposed, robust and biologically relevant routes for NO production largely remain to be defined. To elaborate cell death during an incompatible plant-pathogen interaction NO functions in combination with reactive oxygen intermediates. Furthermore, NO has been shown to regulate the activity of metacaspases, evolutionary conserved proteases that may be intimately associated with pathogen-triggered cell death. NO is also thought to function in multiple modes of plant disease resistance by regulating, through S-nitrosylation, multiple nodes of the salicylic acid (SA) signalling pathway. These findings underscore the key role of NO in plant-pathogen interactions.
机译:一氧化氮(NO)是少数几种气体信号分子之一。 Ignarro作为内皮源性舒张因子(EDRF)的发现,彻底改变了以前被认为是有毒分子的NO和相关反应性氮中间物的看法。现在,NO逐渐成为植物中的关键信号分子,在其中它协调与生长,发育和环境相互作用相关的大量细胞活动。其中最突出的是它在植物超敏细胞死亡和抗病性中的功能。尽管已经提出了许多用于NO生物合成的来源,但是在很大程度上仍需要确定健壮且与生物学相关的NO产生途径。为了阐明植物与病原体不相容相互作用中的细胞死亡,NO与活性氧中间体结合起作用。此外,NO已显示出可以调节metacaspases的活性,metacaspases是进化保守的蛋白酶,可能与病原体触发的细胞死亡密切相关。还认为NO通过S-亚硝基化调节水杨酸(SA)信号传导途径的多个节点,从而在多种植物抗病性模式中发挥作用。这些发现强调了NO在植物-病原体相互作用中的关键作用。

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