This book summarizes the latest research results on the role of reactive oxygen species (ROS) in plants, particularly in many abiotic stresses, and their regulation. Redox homeostasis refers to maintaining a balance of oxidised and reduced state of biomolecules in a biological system for all-round sustenance. In a living system, redox reactions contribute to the generation of reactive oxygen species (ROS), which act as signalling molecules for developmental as well as stress-response processes in plants. It is presumed that, being sessile and an aerobe requiring oxygen for mitochondrial energy production, as well as producing oxygen during photosynthesis, the redox homeostasis process is more complex and regulated in plants than in animals. Any imbalance in the homeostasis is mainly compensated for by the production of various ROS molecules, which, though they can cause severe oxidative damage in excess, can also ideally act as signalling molecules.

Redox regulation of proteins.- Advances in Chlorophyll Fluorescence Theories: Close Investigation into Oxidative Stress and Potential Use for Plant Breeding.- ROS and Fe homeostasis in Plants.- Hydrogen peroxide as a signaling molecule for broad stress responses.- Ascorbate Peroxidases: Scavengers or sensors of hydrogen peroxide Signaling.- Redox Homeostasis in Plants under Arsenic Stress.- Role of reactive oxygen species homeostasis in root development and rhizotoxicity in plants.- microRNAs-mediated redox homeostasis in plants under oxidative stress.- A review on water stress and redox regulation with emphasis on future biotechnological prospects.- Interactions between circadian rhythms, ROS and redox.- ROS and Heat stress.