Salicylic acid alleviates the water stress on photochemical apparatus and quality of Schinus terebinthifolia seedlings

ABSTRACT Water deficit adversely affects photosynthetic pigment synthesis, photochemical processes, and seedling quality. Exogenous foliar application of salicylic acid (SA) is hypothesized to contribute regulation increase stress tolerance. This study aimed evaluate the effect SA in alleviating effects water on activities quality Schinus terebinthifolia Raddi. seedlings. The seedlings were subjected four regimes deficit: 0, 4, 8, 12 days restriction (DWR), associated with concentrations SA: 50, 100, 200 mg L-1 (via spray; 10 mL per plant) during 48 days. Growth S. was affected by longer duration absence treatment. However, increased levels, quantum efficiency photosystem II, absorbed energy conversion under DWR. better at 7 DWR when 100 SA, respectively. exogenous contributed positively concentration stability photosynthesis, it improved long periods.