Salicylic acid does not alleviate salt stress on physiological indicators and growth of guava

In the semi-arid region, quality of water for irrigation stands out as a limiting factor expansion ofagriculture. Thus, it is extremely important to search alternatives that minimize effects salt stress onplants. Foliar application salicylic acid among these strategies. this context, objective ofthis study was evaluate gas exchange, photosynthetic pigments, and growth guava function ofirrigation salinity exogenous in post-grafting stage. The experimentwas conducted under greenhouse conditions, randomized block experimental design, 2 × 4 facto rialscheme, corresponding two levels electrical conductivity (0.6 3.2 dS m-1) fourconcentrations (0; 1.2; 2.4 3.6 mM), with three replicates. Irrigation m-1caused reductions transpiration, CO2 assimilation rate, instantaneous use efficiency instantaneouscarboxylation guava, at 150 days after transplanting. Water dSm-1 reduced stem diameter absolute relative rates, well relativewater content, chlorophyll b contents plants. interaction between levelsand concentrations did not influence physiological indices postgraftingphase.