Salicylic acid improves physiological indicators of soursop irrigated with saline water

ABSTRACT Plants grown under salinity are subject to osmotic and ionic stresses that cause several physiological changes, so searching for strategies minimize the deleterious effects is essential development of irrigated agriculture. In this context, objective was evaluate foliar applications salicylic acid on mitigation salt stress photosynthetic pigments chlorophyll a fluorescence soursop cv. Morada Nova. The study conducted in greenhouse, randomized block design 5 × 4 factorial arrangement, with five values electrical conductivity irrigation water - ECw (0.8 control, 1.6, 2.4, 3.2 4.0 dS m-1) four concentrations SA (0, 1.2, 2.4 3.6 mM), three replicates. Foliar application at concentration 1.4 mM mitigated a, b, total, carotenoids when up 1.5 m-1. Salicylic above combined saline intensified pigments. Chlorophyll not influenced by sprays mM.