Effects of exogenous nitric oxide on membrane lipid peroxidation in wheat leaves under osmotic stress
2008
Wang Junhong
Chinese. 以永良4号小麦品种为试验材料,研究了不同浓度SNP（0.2、0.5、1.0 mmol/L）处理对渗透胁迫下（10%PEG-6000）小麦幼苗叶片膜脂过氧化的影响.结果表明：低浓度SNP（0.2 mmol/L）可以在处理后期（第2和第3天）显著地缓解渗透胁迫下小麦幼苗叶片的氧化损伤,并与其超氧化物歧化酶（SOD）、过氧化物酶（POD）活性以及渗透调节物质脯氨酸（Pro）含量的上升作用一致,与超氧阴离子（O2. .）的释放速率以及丙二醛（MDA）含量的下降一致.高浓度的SNP（1.0 mmol/L）则抑制这两种酶的活性和脯氨酸含量的增加,使O2. .产生速率和MDA含量相对升高.[著者文摘]
Show more [+] Less [-]English. Effects of nitric oxide （NO） donor,sodium nitroprusside（SNP）, with different concentrations on lipid peroxodation in wheat seedling leaves under 10 % PEG-6000 osmotic stress were investigated through 3 d of treatment. The results indicated that low concentration of SNP （0.2 mmol/L） could apparently alleviate the osmotic stress-induced lipid peroxidation during the late period of treatment （after 2 day treatment）, which consistent with the up-regulation of enzyme activities, such as SOD, POD and the content of proline;consistent with the down-regulation of O2. production speed and the content of MDA. Meanwhile,high concentration of SNP （1.0 mmol/L） suppressed the activities of SOD and POD enzymes and content of proline,enhanced the O2. production speed and the content of MDA.
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