摘要
用不同浓度的外源一氧化氮(NO)供体SNP处理100 mmol/L NaCl胁迫下一年生燕麦草幼苗,研究了外源NO对NaCl胁迫下燕麦幼苗氧化损伤的影响。结果表明,外源NO可缓解NaCl胁迫造成的燕麦幼苗膜质过氧化产物丙二醛(MDA)含量的升高,促进脯氨酸(Pro)积累,提高超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性,并能缓解叶绿素含量的降解,提高可溶性糖的含量。而且NO的这种作用存在明显的剂量效应,其中以0.2 mmol/L SNP处理效果最为显著。
The effects of an exogenous nitric oxide donor （sodium nitroprusside, SNP） at concentrations of 0.2, 0.5 and 1.0 mmol/L on oxidative damage in oat seedling leaves under 100 mmol/L NaCl stress were studied. Treatment of NaCl stress with different concentrations of SNP significantly increased the activities of antioxidant enzymes （including SOD, CAT and POD） and the contents of proline and chlorophy II in leaves, but significantly decreased MDA contents of leaves compared with salt stress controlled seedling leaves. Moreover the effects of SNP for alleviation of NaCl stress were dose-dependant. The optimum SNP concentration for elevating the leaf antioxidation ability of oat seedlings was 0.2 mmol/L and was mainly achieved by enhancing antioxidative capability in leaves of oat seedlings
出处
《草业学报》
CSCD
2008年第5期48-53,共6页
Acta Prataculturae Sinica
基金
甘肃省教育厅基金(0702-14)
教育部高校优秀青年教师教学科研奖励基金(031074)资助
