Effects of 2,4-Epibrassinolide(EBR)on Leaf Physiological Characteristics and Fruit Quality of Pepper under Drought Stress
2,4-Epiandrosterone(EBR)is one of the most active forms of brassinolide,which can stimulate different plant metabolic processes.To investigate the effects of applying EBR during the flowering period on the drought resistance and fruit quality of peppers under drought stress conditions,with Pingjiao 7 as test material,the pot experiment was conducted to investigate the effects of spraying 0.4 mg/L EBR on chlorophyll content,antioxidant parameters,osmoregulation parameters and fruit quality of peppers under different levels of drought stress.The results showed that spraying 0.4 mg/L EBR at pepper flowering stage could significantly increase the contents of chlorophyll,POD,SOD,Pro,and CAT activity in pepper leaves,while it could significantly reduce the accumulation of MDA.The soluble sugar content,soluble protein content and vitamin C content of pepper were also significantly increased compared with that in the control.These results indicated that exogenous EBR could relieve the inhibition of drought stress on the growth of peppers and improve their quality as well.
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