干旱地区农业研究Issue(5)：75-79,5.DOI:10.7606/j.issn.1000-7601.2015.05.14
外源 NO 对干旱胁迫下玉米幼苗膜脂过氧化的调节效应
Regulation of membrane lipid preoxidation by nitric oxide in maize seedlings under drought stress
摘要
Abstract
In order to explore the influences of oxidative damage by nitric oxide (NO ) on maize seedlings under drought stress ,a pot experiment to investigate the effects of exogenous nitric oxide donors (sodium nitroprusside ,SNP) at concentrations of 0 .01 ,0 .05 ,0 .1 ,0 .5 mmol·L-1 and 1 .0 mmol·L-1 on membrane lipid peroxidation was carried out using Zhengdan 958 as experimental material .The results showed that appropriate concentration (0 .05 mmol·L-1 ) of exogenous NO could relieve the damage from drought stress , significantly improving the activity of protective enzymes SOD and CAT .Compared with those under drought stress ,the SOD and CAT activities were increased by 23 .89% and 87 .78% ,respectively . Proline , soluble sugar , soluble protein and chlorophyll content were increased by 23 .89% , 87 .78% ,43 .44% ,39 .84% ,41 .33% and 21 .45% ,respectively .However ,MDA content and membrane permeabil-ity were significantly reduced by 11 .76% and 51 .17% ,respectively .There were dosage effects of exogenous nitric oxide donor (SNP) on alleviation of drought stress in maize seedlings ,which significantly enhanced the drought tolerance of maize seedlings .关键词
一氧化氮/干旱胁迫/玉米幼苗/膜脂过氧化Key words
nitric oxide/drought stress/maize seedling/membrane lipid peroxidation分类
农业科技引用本文复制引用
王芳,赵有军,王汉宁..外源 NO 对干旱胁迫下玉米幼苗膜脂过氧化的调节效应[J].干旱地区农业研究,2015,(5):75-79,5.基金项目
973计划前期研究专项（2012CB722902）；甘肃农业大学盛彤笙科技创新基金 （）
