%0 Journal Article
%T Effects of exogenous nitric oxide on growth and physiological characteristics of ryegrass seedlings under salt stress<br>外源一氧化氮对盐胁迫下黑麦草幼苗生长及生理特性的影响
%A SUN Li-Rong
%A HAO Fu-Shun
%A L Jian-Zhou
%A L Peng-Fei
%A ZHAO Shi-Ling
%A <br>孙立荣
%A 郝福顺
%A 吕建洲
%A 吕鹏飞
%A 赵世领
%J 生态学报
%D 2008
%I 
%X Effects of exogenous nitric oxide (NO) on growth and changes in some physiological characteristics of perennial ryegrass seedlings under salt stress were investigated. The results indicated that exogenous NO donor, named sodium nitroprusside (SNP), at concentrations of 50-200 mol L-1 obviously alleviated the inhibition of salt upon the ryegrass seedling growth in comparison with the control; and 100 mol L-1 SNP had the strongest effects. Furthermore, treatments of the seedlings with SNP resulted in the pronounced alleviation in the increases of relative electrolyte leakage, K+ to Na+ ratio, the content of malondialdehyde and levels of reactive oxygen species in leaves under salt stress compared with the control. In addition, SNP treatments markedly enhanced the proline content and the activities of the main antioxidant enzymes superoxide dismutase, catalase, ascorbate peroxidase and peroxidase in leaves of the seedlings under salt stress. These findings suggest that NO may alleviate the damage caused by salt in ryegrass seedlings via decreasing the Na+ content, increasing the contents of K+ and proline, and activating the antioxidant protest enzymes, thus improves salt resistance of the perennial ryegrass plants.
%K 一氧化氮
%K 盐胁迫
%K 多年生黑麦草
%K 活性氧
%K 抗氧化酶
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=C3F8FE1E3477323B7A09066D376070D9&yid=67289AFF6305E306&vid=D3E34374A0D77D7F&iid=708DD6B15D2464E8&sid=BAFB39DB22121EF6&eid=7E217BAD016C6D71&journal_id=1000-0933&journal_name=生态学报&referenced_num=5&reference_num=35