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Hydrogen Peroxide and Its Role in Abiotic Stress Tolerance in Plants

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Gasotransmitters Signaling in Plant Abiotic Stress

Part of the book series: Signaling and Communication in Plants ((SIGCOMM))

Abstract

Plants are continuously subjected to numerous abiotic stresses such as heavy metal, salinity, drought, high temperature, cold and ozone etc. which alters the normal functioning and development thus reduce the productivity globally. As a result, give rise to cellular toxicity by disruption of redox balance in the form of ROS, which eventually transforms into hydrogen peroxide (H2O2). Hydrogen peroxide being a toxicant is now considered as a regulatory molecule because of its dual role. At low concentrations H2O2 acts as a signalling molecule for expression of multiple pathways of antioxidant system and at higher concentration it causes cell burst and ultimately cell death. Moreover, these multiple abiotic stresses result in alteration of normal homeostasis of formation and scavenging of cellular ROS. To withstand these abiotic stressful conditions, plants have evolved efficient regulatory mechanism by developing anti-oxidative defense system. In this paper, we summarise the various aspects related to H2O2 function, metabolism and describe multiple abiotic stress, their acclimation and scavenging system. At the end we examine the role of phytohormones and H2O2 in abiotic stress acclimation and resilience. Thus H2O2 crosstalk with phytohormones plays a pivotal role in developing strategies for the mitigation of abiotic stress to a great extent.

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Correspondence to Mohd Asgher .

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ul Islam, S.N., Asgher, M., Khan, N.A. (2023). Hydrogen Peroxide and Its Role in Abiotic Stress Tolerance in Plants. In: Fatma, M., Sehar, Z., Khan, N.A. (eds) Gasotransmitters Signaling in Plant Abiotic Stress. Signaling and Communication in Plants. Springer, Cham. https://doi.org/10.1007/978-3-031-30858-1_9

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