Effects of Exogenous 24-Epibrassinolide on Seed Germination,Physiological Characteristics of Eggplant Seedlings under NaCl Stress

The objective of this study was to investigate the effects of exogenous 24-epibrassinolide(EBR) on seed germination,seedling growth,and physiological characteristics in eggplant(Solanum melongena L.) seedlings under 150 mmol·L-1 NaCl stress.The results showed that 0.05 mg·L-1 EBR significantly alleviated the damage caused by 150 mmol·L-1 NaCl.Specifically,seed germination rate,germination potential,germination index and vigor index were increased by 8.23%,15.91%,17.23%,and 44.29%,respectively;plant height,root length and fresh weight were increased by 56.67%,23.83% and 56.68%,respectively;the activities of SOD,POD,CAT and APX were increased by 13.75%,24.00%,28.64% and 21.46%,respectively;and contents of proline and soluble sugar were increased by 30.96% and 23.66%,respectively;while contents of MDA and O2·-producing rate were decreased by 29.58% and 14.80%,respectively.Results suggested that exogenous 0.05 mg·L-1 EBR significantly stimulated seed germination and seedling growth,alleviated oxidative damage,and elevated the salt tolerance of plant.