Foliar Application of Salicylic Acid Mitigates Saline Stress on Physiology, Production, and Post-Harvest Quality of Hydroponic Japanese Cucumber

Salicylic acid (SA) is a phenolic compound capable of inducing physiological and metabolic changes that enhance the tolerance plants to saline stress associated with using hydroponic system enable use water in semi-arid regions. In this context, assay aimed evaluate impact foliar application SA on mitigating salt effects Japanese cucumber cultivated system. The experiment was carried out protected ambient (greenhouse), Nutrient Film Technique—NFT A completely randomized design performed 4 × split-plot scheme, four levels electrical conductivity nutrient solution—ECns (2.1, 3.6, 5.1, 6.6 dS m?1)—considered as plots concentrations (0, 1.8, 5.4 mM), regarded subplots, replicates two per plot. An increase ECns negatively affected physiology, production components, post-harvest quality cucumber. However, leaves at between 1.4 2.0 mM reduced deleterious promoted an improvement fruits.