A perspective view of nitric oxide: biosynthesis, metabolism and signaling in plants

Abstract

<p indent="0mm">Nitric oxide (NO) is an important gaseous signaling molecule widely distributed in living organisms, it modulates protein stability and enzyme activities mainly through post-translational modifications, including <italic>S</italic>-nitrosylation and tyrosine nitration. NO regulates multiple physiological processes during plant development and stress responses. Moreover, the complex interplay among NO and phytohormones, reactive oxygen species and other signaling molecules precisely regulates various stages of plant growth and development to maintain normal life activities. Here, we review the synthesis and metabolism of NO, and provide insights into the mechanism and biological significance of NO in the regulation of plant development and stress responses.