Effects of Foliar Spraying with Salicylic Acid on Physiological Characteristics and Antioxidase Activity of Angelica sinensis(Oliv.)Diels
Abstract:Objective:The study aims at investigating the influences of exogenous salicylic acid on the growth and antioxidase activity of Angelica sinensis seedlings,and providing a theoretical basis for breeding.Methods:Foliar spraying with a series concentration of salicylic acid were applied.The length and fresh weight,superoxide dismutase,peroxidase and catalase activities of the seedlings were measured after salicylic acid treatments.Results:The growth and antioxidase activity of A.sinensis seedlings could be promoted with appropriate concentration of salicylic acid treatments.The length and fresh weight of the seedlings was increased to 135.2% and 224.6% compared with the control after 0.5 mmol·L-1 salicylic acid spraying respectively.However,the growth conditions and weights of seedlings were inhibited by increasing concentration of salicylic acid.SOD,POD and CAT activities were promoted to 149.1%(7 d),138.2%(7 d),and 194.7%(5 d)compared with controls respectively under the treatment of 1.0 mmol·L-1 salicylic acid.Conclusion:0.5 mmol·L-1 of salicylic acid foliar spraying is benefit for growth condition of seedlings,and relatively higher salicylic acid concentration will be benefit to antioxidase activities promotion,but inhibits the growth condition of A.sinensis seedlings apparently.