The Influence of the Salicylic Acid for Membrane Lipid Peroxidation under Water Stress on Strawberry Young Plants

Effects of salicylic acid in plant drought resistance were investigated. We take strawberry young plants as the materials and use the pretreatment of different concentrations of salicylic acid,each processing strawberry leaves were determined plasmalemma peroxide index,protective enzymes activity and photosynthetic characteristics. under water stress,the reactive oxidative species(ROS) of strawberry leaves appears two different peaks. The antioxidant enzymes obvious increase after the first peak,and the membrane lipid peroxidation maintain lower level; with the stress time prolong,ROS accumulates again,and membrane lipid peroxidation increase immediately with it. Suitable concentration salicylic acid treatments promote the ROS earlier period accumulation and effectively stimulate antioxidant enzymes activity,and alleviate membrane lipid peroxidation damage,also leaves maintain high photosynthesis activity; but high concentration salicylic acid treatments promote membrane lipid peroxidation damage. salicylic acid promote oxidative burst and activate protective enzyme activity and alleviate membrane lipid peroxidation damage to improve plant water stress resistance.