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Employing nutrient solution hydroponic method,the effects of exogenous nitric oxide(NO)on the growth and active oxygen metabolism in cucumber(Cucumis sativus L.)seedlings under NaCl stress were investigated.The results indicated that NaCl treatment significantly inhibited the growth of cucumber seedlings,while exogenous NO could significantly alleviate the inhibitory effects of NaCl stress on seedling growth.Especially,0.1 mmol/L SNP treatment exhibited better effects than 0.5 mmol/L SNP treatment on alleviating NaCl stress.Under 0.1 mmol/L NaCl stress,adding 0.1 mmol/L exogenous NO could significantly decrease the generation rate of O·-2and MDA content,significantly improve soluble protein content and enhance the activities of SOD,POD and CAT,thus reducing the damage of salt stress to cucumber seedlings.
Employing nutrient solution hydroponic method, the effects of exogenous nitric oxide (NO) on the growth and active oxygen metabolism in cucumber (Cucumis sativus L.) seedlings under NaCl stress were investigated. The results indicate that NaCl treatment significantly inhibited the growth of cucumber seedlings , while exogenous NO could significantly alleviate the inhibitory effects of NaCl stress on seedling growth. Especially, 0.1 mmol / L SNP treatment showed better effects than 0.5 mmol / L SNP treatment on alleviating NaCl stress. Uder 0.1 mmol / L NaCl stress, adding 0.1 mmol / L exogenous NO could significantly decrease the generation rate of O · -2and MDA content, significantly improve soluble protein content and enhance the activities of SOD, POD and CAT, thereby reducing the damage of salt stress to cucumber seedlings.