干旱地区农业研究2016，Vol.34Issue(2)：171-176,200,7.DOI:10.7606/j.issn.1000-7601.2016.02.28
外源 NO 对 NaCl 胁迫下玉米幼苗生长和渗透调节能力的影响
Effects of exogenous nitric oxide on growth and osmoregulatory capability of maize (Zea mays L .) seedlings under salt stress
摘要
Abstract
A water culturing method was adopted to study the effects on the growth and osmoregulatory capability of maize seedling under NaCl stress and exogenous nitric oxide (NO ) donor sodium nitroprusside (SNP ) that was applied with three levels of treatments including 50 ,100μmol·L-1 and 200μmol·L-1 .The results indicated that the exogenous nitric oxide (NO ) could alleviate the inhibited growth induced by NaCl stress .Compared with the treatment without ap-plying SNP ,the total whole plant dry weight with 100 μmol·L-1 SNP was increased by 19% .The contents of soluble sugar and soluble protein in leaves of seedlings and roots were reduced by exogenous nitric oxide (NO ) ,being decreased by 19 .9% and 7 .9% in leaves and the 9 .6% and 9% in roots ,respectively .The content of Na+ in roots ,young blade and mature sheath of maize seedling under salt stress was apparently decreased by 38 .4% ,5 .1% and 17 .2% through the application of exogenous NO ,respectively .The contents of K+ ,Ca2+ ,and Mg2+ in root and mature sheath were rather increased .The ratios of Na+ /K+ and Na+ /Ca2+ in different organs of maize seedling were decreased ,and the ions balance in maize seedling under salt stress was maintained by exogenous NO .Exogenous NO caused subtle effect on the mature blade . It was concluded that exogenous nitric oxide (NO ) can keep the balance of carbon-nitrogen metabolism ,improve ions uptake and distribution in maize seedling under NaCl stress ,and alleviate the damage induced by NaCl stress .The concentration of SNP for the most apparent result was 100 μmol·L-1 .关键词
玉米幼苗/NO/NaCl胁迫/渗透调节Key words
maize seedlings/nitric oxide/NaCl stress/osmotic adjustment分类
农业科技引用本文复制引用
薛盈文,王玉凤,杨克军,于立河..外源 NO 对 NaCl 胁迫下玉米幼苗生长和渗透调节能力的影响[J].干旱地区农业研究,2016,34(2):171-176,200,7.基金项目
国家公益性行业（科研）专项“本地与引进种质资源高效结合与利用研究”（201303007）；“十二五”农村领域国家科技计划项目子课题 （）
