This book presents a detailed study of the ecophysiology of Physalis peruviana L. subjected to saline stress and the use of salicylic acid as a mitigant. The book discusses the effects of salinity in irrigation water on the growth and physiological responses of the crop, highlighting the role of salicylic acid as a regulator and signaling antioxidant mechanisms. The results show that, in certain concentrations, salicylic acid can mitigate the negative impacts of salinity, contributing to the adaptation and development of physalis in adverse environments.