【摘要】 以100mmol·L-1NaCl作为盐胁迫条件,研究不同浓度的外源一氧化氮供体硝普钠(sodiumnitroprusside,SNP)处理5d对盐胁迫下水稻幼苗叶片脂质过氧化的影响。结果表明,低浓度SNP(10μmol·L-1)可以在处理后期(第4～5天)显著地缓解盐胁迫对水稻幼苗叶片造成的氧化损伤,并与其对过氧化氢酶(CAT)、过氧化物酶(POD)和抗坏血酸过氧化物酶(APX)等H2O2清除酶活性以及脯氨酸含量的上调作用一致。此外,较高浓度的SNP处理(50μmol·L-1)也具有在一定程度上缓解脂质过氧化的作用。更多还原

【Abstract】 Effects of nitric oxide（NO）donor sodium nitroprusside（SNP）with different concentrations on lipid peroxidation in rice seedling leaves under 100 mmol·L^-1 NaCl salt stress were investigated through 5 d of treatment.The results indicated that low concentration of SNP（10 μmol·L^-1）could apparently alleviate the salt-induced lipid peroxidation during the late period of treatment（after 4 d treatment）,which consistent with the up-regulation of H₂O₂ scavenging enzyme activities,such as CAT,POD and APX,and the content of proline.Meanwhile,high concentration of SNP（50 μmol·L^-1）exhibited the same weaker capability.更多还原