Jasmonic and Abscisic Acid Contribute to Metabolism Re-adjustment in Strawberry Leaves under NaCl Stress

The aim of this research was to evaluate the effect of exogenous jasmonic acid and abscisic acid, at different salinity regimes, on primary and secondary metabolic changes in Modified Letter Turned CommaKurdistan & apos; and Modified Letter Turned CommaQueen Elisa & apos; strawberry leaves. To this end, strawberry plants were induced by gradual NaCl salinity (10 mmol center dot L-1) and shock salinity. The plants were sprayed with ABA (40 mmol center dot L-1) and JA treatments up to 40 mmol center dot L-1. In both cultivars, salt shock stress significantly enhanced the total antioxidant capacity, though the JA treatment outperformed the ABA treatment. Increasing JA level in the presence of ABA resulted in downswing in total phenolic content (6.42% in Modified Letter Turned CommaKurdistan & apos; and 23.13% in Modified Letter Turned CommaQueen Elisa & apos;) and antioxidant capacity (12.9% in Modified Letter Turned CommaKurdistan & apos; and 17.7% in Modified Letter Turned CommaQueen Elisa & apos;) at non-saline conditions. Adding both hormonesresulted in a 20.82% increase in total phenolic content and a 17.86% increase in total antioxidant capacity in 'Kurdistan' at gradual salt stress; however, in Modified Letter Turned CommaQueen Elisa & apos;, the same treatment resulted in 21.98% increase in total phenol and 11.92% increase in total antioxidant capacity at salt shock. Salt shock induced tyrosine increase and both hormones enhanced asparagine, alanine, histidine, and GABA contents in Modified Letter Turned CommaQueen Elisa & apos;. The study reveals that the applation of abscisic acid along with different jasmonic acid concentrations activates the protective mechanism of the strawberry plant against NaCl stress. Further studies are needed to compare the exact salt stress tolerance mechanisms for these cultivars.