Hydrogen Peroxide: Regulator of Plant Development and Abiotic Stress Response (original) (raw)

2023, Reactive Oxygen Species

Due to their immobility both in vitro and in vivo, crop plants are constantly exposed to abiotic and biotic factors. As a result, they have more sophisticated immune defences than animals. They might experience the mixture of these stressors concurrently or successively. The study of hydrogen peroxide (H 2 O 2) is becoming more popular in the realm of molecular biology. It is a significant redox (reduction-oxidation reaction) metabolite that causes oxidative injury to biomolecules at high quantities, which can lead to cell death. Conversely, at low concentrations, H 2 O 2 functions as a signalling molecule and mimics plant hormones in several ways. The hazardous nature of hydrogen peroxide was first understood to result in cell viability losses due to injury at several levels of cell organisation. It is now well-known that H 2 O 2 has a positive role as a major hub integrating signalling network in response to abiotic stress and during developmental processes. In this chapter, the production, scavenging and the dual role of hydrogen peroxide from the point of view of its role in plant growth and developmental process and in abiotic stress tolerance have been presented.

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