A decade-long investigation of nitric oxide (NO) functions in plants has led to its characterization as a biological mediator involved in key physiological processes. Despite the wealth of information gathered from the analysis of its functions, until recently little was known about the mechanisms by which NO exerts its effects. In the past few years, part of the gap has been bridged. NO modulates the activity of proteins through nitrosylation and probably tyrosine nitration. Furthermore, NO can act as a Ca(2+)-mobilizing messenger, and researchers are beginning to unravel the mechanisms underlying the cross talk between NO and Ca(2+). Nonetheless, progress in this area of research is hindered by our ignorance of the pathways for NO production in plants. This review summarizes the basic concepts of NO signaling in animals and discusses new insights into NO enzymatic sources and molecular signaling in plants.

中文翻译：

---

对植物中一氧化氮信号传导的新见解

对植物中一氧化氮 (NO) 功能的长达十年的研究已将其表征为参与关键生理过程的生物介质。尽管从其功能分析中收集了大量信息，但直到最近，人们对 NO 发挥作用的机制知之甚少。在过去几年中，部分差距已被弥补。NO 通过亚硝基化和可能的酪氨酸硝化来调节蛋白质的活性。此外，NO 可以充当 Ca(2+) 动员信使，研究人员开始解开 NO 和 Ca(2+) 之间串扰的潜在机制。尽管如此，我们对植物中 NO 产生途径的无知阻碍了这一研究领域的进展。