Chapter 01: The Role of Gas Transmitters in Plant Hormonal Responses to Abiotic Stress -- Chapter 02: Understanding the involvement of gasotransmitters in the regulation of cellular signalling and adaptive responses against UV-B mediated oxidative stress in plants -- Chapter 03 Signaling Pathways of Gasotransmitters in Heavy Metal Stress Mitigation -- Chapter 04: Volatile signaling molecules in plants and their interplay with the redox balance under challenging environments: new insights -- Chapter 05: Alleviation of Plant Stress by Molecular Hydrogen -- Chapter 06: Understanding the role of nitric oxide and its interactive effects with phytohormones in mitigation of salinity stress -- Chapter 07 Nitric oxide - a small molecule with big impacts on plants under heavy metal stress -- Chapter 08: Nitric oxide: a key modulator of postharvest fruit and egetable physiology -- Chapter 09: Interaction of hydrogen sulfide with other phytohormones during physiological and stress conditions -- Chapter 10: Gasotransmitter hydrogen sulfide (H2S) and its role in plant development and defense responses -- Chapter 11 Hydrogen Sulfide (H2S) signaling in plants responding to abiotic stresses -- Chapter 12 Hydrogen sulfide metabolism and its role in regulating salt and drought stress in plants -- Chapter 13 Functional Roles of Hydrogen Sulphide in Postharvest Physiology of Fruit and Vegetables -- Chapter 14: Carbon compounds as gasotransmitters in plants under challenging environment -- Chapter 15: Carbon monoxide (CO) and its association with other gasotransmitters in root development, growth and signaling.