Abstract
The review considers involvement of nitric oxide (NO) in regulation of basic physiological processes underlying growth, development, and senescence in plants. The NO sources in plants, as well as direct and indirect NO signaling mechanisms are also reviewed. Particular attention is paid to the role of this secondary messenger in plant responses to various abiotic stresses, such as mechanical injury, salinity, drought, UV irradiation, high and low temperatures, ozonation, hypoxia, the impacts of heavy metals and herbicides. The role of NO in the hypersensitive response and in a systemic response upon plant infection with invasive pathogens is described.
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