Abstract:

Abstract：Broccolis Gefu(salt tolerant) and Shanshui(salt sensitive) were conducted to study the effects of exogenous calcium chloride on fresh weight, dry weight, ions content and different antioxidant enzymes activities under salt stress. The results showed that exogenous calcium could promote the growth of broccoli significantly, alleviate the effect of salt stress and increase the fresh and dry weight of broccoli. Exogenous calcium reduced MDA content and alleviated the level of membrane lipid peroxidation in broccoli under salt stress. The effect of exogenous calcium on the activities of SOD, POD and CAT differed with the varieties of broccolis. Exogenous calcium could increase the K+, Ca+ uptake of shoot and root, but there was a negative effect on Na+. Compared with the salt-tolerance broccoli, the effect of exogenous calcium on salt-sensitive broccoli was better. During experiment, we found that 10mmol/L was the best concentration of exogenous calcium to alleviate salt injury of broccoli.