| Autor: |
Sobrinho TG; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., da Silva AAR; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., de Lima GS; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., de Lima VLA; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., Borges VE; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., Nunes KG; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., Soares LADA; Academic Unit of Agrarian Sciences, Federal University of Campina Grande, Pombal 58840-000, PB, Brazil., Saboya LMF; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., Gheyi HR; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., Gomes JP; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., Fernandes PD; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil., de Azevedo CAV; Post Graduate Program Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil. |
| Abstrakt: |
Brazil stands out as the largest producer of sour passion fruit; however, the water available for irrigation is mostly saline, which can limit its cultivation. This study was carried out with the objective of evaluating the effects of salicylic acid in the induction of tolerance in sour passion fruit to salt stress. The assay was conducted in a protected environment, using a completely randomized design in a split-plot scheme, with the levels of electrical conductivity of the irrigation water (0.8, 1.6, 2.4, 3.2, and 4.0 dS m -1 ) considering the plots and concentrations of salicylic acid (0, 1.2, 2.4, and 3.6 mM) the subplots, with three replications. The physiological indices, production components, and postharvest quality of sour passion fruit were negatively affected by the increase in the electrical conductivity of irrigation water, and the effects of salt stress were intensified in the second cycle. In the first cycle, the foliar application of salicylic acid at concentrations between 1.0 and 1.4 mM partially reduced the harmful effects of salt stress on the relative water content of leaves, electrolyte leakage, gas exchange, and synthesis of photosynthetic pigments, in addition to promoting an increase in the yield and quality parameters of sour passion fruit. |
