2.2 Salt stress (NaCl) treatment
Salt (NaCl) treatment was applied to hydroponic solution. During the plants transfer, roots were washed adequately with tap water then rinsed with deionized water. Four-week-old SV and 10-week-old SAplants were treated with 0, 50, 100, 250, 400, and 550 mM NaCl for up to 15 days. The composition of the hydroponic medium was as described by Hoagland and Arnon (1950).