Oxygen, Nitrogen and Sulfur Species in Post-harvest Physiology of Horticultural Crops, a volume in the Plant Gasotransmitter series, analyzes the latest advances in post-harvest physiology. The book presents metabolic cascades and highlights the role of gasotransmitters as intercellular regulators of metabolic processes. Post-harvest physiology differs between climacteric and non-climacteric fruits and vegetables, as well as for fresh-cut flowers and non-food plants. Initial chapters review the cascades, intercellular pathways and messenger molecules that drive ripeness and longevity, presenting the chemistry behind key pathways. The books also takes a deep dive into core gasotransmitters, describing the data behind known properties, chemistry and physiological roles. Applications for prolonging shelf-life via the control of post-harvest fungi, bacteria and omics approaches are reviewed in detail, offering readers guidance on how to put gasotransmitters research into practice. This is an essential resource for students, researchers and agronomists interested in plant physiology, biochemistry and plant hormones.