Nitric oxide, other reactive signalling compounds, redox, and reductive stress.

Journal of Experimental Botany
John T Hancock, David Veal

Abstract

Nitric oxide (NO) and other reactive nitrogen species (RNS) are key signalling molecules in plants, but they do not work in isolation. NO is produced in cells, often increased in response to stress conditions, but many other reactive compounds used in signalling are generated and accumulate spatially and temporally together. This includes the reactive oxygen species (ROS), such as hydrogen peroxide (H2O2), and hydrogen sulfide (H2S). Here, the interactions with such other reactive molecules is briefly reviewed. Furthermore, along with ROS and H2S, NO will potentially contribute to the overall intracellular redox of the cell. However, RNS will exist in redox couples and therefore the influence of the cellular redox on such couples will be explored. In discussions of the aberrations in intracellular redox it is usually oxidation, so-called oxidative stress, which is discussed. Here, we consider the notion of reductive stress and how this may influence the signalling which may be mediated by NO. By getting a more holistic view of NO biology, the influence on cell activity of NO and other RNS can be more fully understood, and may lead to the elucidation of methods for NO-based manipulation of plant physiology, leading to better str...Continue Reading

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Citations

Feb 12, 2021·Journal of Experimental Botany·Zsuzsanna KolbertGary J Loake
Mar 6, 2021·Physiologia Plantarum·Vinod GoyalShweta Mehrotra
Jul 13, 2021·Frontiers in Plant Science·Susan J Murch, Lauren A E Erland

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