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采用0.1～0.5mmol/LSNP处理,研究外源NO对20%PEG-6000渗透胁迫下冬瓜幼苗生理特性的影响.结果表明:0.1mmol/LSNP处理能显著缓解20%PEG-6000的胁迫伤害,使叶片MDA含量降低62.65%,相对电导率降低28.09%,Pro含量提高14.35%,POD、CAT和SOD活性分别提高1.46倍、41.34%和14.01%.与0.1mmol/LSNP处理相比,0.3,0.5mmol/LSNP处理缓解叶片氧化损伤和提高保护酶活性的作用明显或显著降低,0.5mmol/LSNP抑制POD与SOD活性.
The effects of exogenous NO on the physiological characteristics of wax gourd seedlings under 20% PEG-6000 osmotic stress were studied using 0.1-0.5 mmol / L LSNP treatment.The results showed that 0.1 mmol / L LSNP could significantly alleviate the stress injury of 20% PEG-6000 Compared with 0.1 mmol / LSNP treatment, the MDA content in leaf decreased by 62.65%, the relative conductivity decreased by 28.09%, the Pro content increased by 14.35%, and the activities of POD, CAT and SOD increased by 1.46 times, 41.34% and 14.01% The effect of LSNP treatment on mitigating the oxidative damage of leaves and increasing the activity of protective enzymes was significantly or significantly reduced, and the activities of POD and SOD were inhibited by 0.5 mmol / L LSNP.