维普资讯 http://www.cqvip.com 64 ACTA PRATACUI TURAE SINICA(Vo1.1 7,NO.4) 8/2008 [39] Stohs S J,Bagchi.Oxidative mechanism in the toxicity of metal ions[J].Free Radical Biology and Medicine,1995,18:321 326. Effect of exogenous nitric oxide on the growth and antioxidant enzyme activities of Lolium perenne under Cd stress ZHANG Yuan—bing.LIU Ai—rong.FANG Rong (Life Science College,Anhui Science and Technology University,Bengbu 233100,China) Abstract:Lolium perenne seedlings were treated with SNP(a NO donor)0.1 mmol/L,Cd 200 mg/L and SNP 0.1 mmol/L十Cd抖200 mg/L.Compared with the CK,SNP at 0.1 mmol/I increased biomass amount, chlorophyll content and root activity,but decreased MDA content,generation rate and membrane permeability, while enhanced the antioxidant enzymes activities of L.perenne seedlings.However,200 mg/L Cd decreased biomass amount,chlorophyll content and root activity,but increased MDA content,generation rate,mere— brane permeability,and accumulated Cd抖.The antioxidant enzymes activities decreased.Compared with Cd 200 mg/L treatment,SNP 0.1 mmol/I promoted biomass amount,chlorophyll content and root vigor,but de— creased MDA content,generation rate,membrane permeability and Cd抖content of L.perenne seedlings, while increased the antioxidant enzyme activities of the seedlings increased under Cd 200 mg/I stress.The results indicated that exogenous nitric oxide(NO)had a mitigating effect on the growth of seedlings under Cd 200 mg/L stress,and enhanced the resistance of them tO Cd toxicity. Key words:Lolium perenne;nitric oxide;cadmium stress;antioxidant enzyme;mitigation effect 《草业学报》扩刊启事 《草业学报》是中国草学会,兰州大学草地农业科技学院主办的专业学术类期刊。主要刊载国内外草业科学 及相关领域(如生态学、畜牧学、农学、林学等)创新性研究论文、综述、专论和学科前沿动态等。 草业学报》为英国CABI文献数据库来源期刊,国家科技部“中国科技论文统计源期刊”,中国科学引文数据 库(CSCD)核心期刊。2007年科技部中国科技信息所《中国科技期刊引证报告》统计影响因子为1.486,名列全国 1723种科技期刊第32位。在全国同行业畜牧兽医类期刊中始终排名第1位。 承蒙广大作者的厚爱,本刊投稿量日渐增大,有许多颇具参考价值的文章被拒,我们也深感惋惜。为回馈广 大作者多年来对《草业学报》的厚爱和信任,也为使尚有价值发表的文章能被录用,《草业学报》决定从2009年起 扩增每期页数,由原150页扩至250页。欢迎投稿,本刊对录用的稿件争取在1年内刊出。在此感谢广大作者和 读者罗年来对《草业学报》的支持和信任。 本刊标准刊号:ISSN 1004—5759 电话:(0931)8913494 CN 62—1105/S 邮发代号:54—84 邮编:730020 编辑部地址:兰州市嘉峪关西路768号《草业学报》编辑部 E—mail:cyxb@Izu.edu.cn