Nitric Oxide in Plant Resilience to Abiotic Stress offers a detailed examination of this essential gasotransmitter's pivotal role in bolstering plant defenses against environmental stressors. Part of the Plant Gasotransmitters and Molecules with Hormonal Activity series, the volume investigates the molecular mechanisms of nitric oxide (NO) biosynthesis and signaling, emphasizing how post-translational modifications like S-nitrosylation and tyrosine nitration govern key targets to activate adaptive stress responses. It systematically examines NO's properties, detection techniques, and its regulation under both optimal and adverse conditions, providing a comprehensive understanding of how it modulates plant functions. Expanding beyond fundamental processes, the volume highlights NO's crucial involvement across a spectrum of abiotic stresses--drought, salinity, temperature extremes, heavy metals, and UV radiation--unveiling its capacity to mitigate damage and strengthen plant resilience. It also discusses the crosstalk between NO and other signaling molecules, such as phytohormones and emerging growth regulators, revealing synergistic pathways that underpin sustainable agriculture. Designed for researchers, advanced students, and plant scientists worldwide, this work illuminates the potential of NO to drive innovations in breeding strategies, enabling crop improvement to overcome the challenges posed by a changing climate and expanding environmental pressures.