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在100 mmol/L NaCl的胁迫条件下,研究了两种浓度的一氧化氮供体硝普钠(sodium nitroprusside,SNP)处理对水稻幼苗根部脂质过氧化的影响。低浓度(10 μmol/L)的SNP处理明显缓解盐胁迫下水稻幼苗根组织膜脂过氧化产物MDA的累积,显著提高可溶性蛋白含量,并诱导根系APX、POD和SOD活性的上升;而高浓度(50 μmol/L)SNP处理的效果则基本相反。表明外源低浓度NO可以通过提高盐胁迫下水稻幼苗根组织的抗氧化能力来缓解氧化损伤。
Under 100 mmol / L NaCl stress, the effects of two concentrations of nitric oxide donor sodium nitroprusside (SNP) on lipid peroxidation in roots of rice seedlings were studied. The SNP treatment at low concentration (10 μmol / L) significantly alleviated the accumulation of MDA in the root tissue of rice seedlings under salt stress, significantly increased the content of soluble protein, and induced the APX, POD and SOD activities in roots. (50 μmol / L) SNP treatment effect is basically the opposite. The results showed that exogenous low concentration of NO can alleviate the oxidative damage by increasing the antioxidant capacity of rice seedling root under salt stress.