模拟酸雨对洋葱根系SOD,CAT及MDA的影响  

Effects of Acid Rain on SOD,CAT and MDA in Onion(Allium cepal.) Root tips

作　　者：黄周英[1] 陈怀宇[1] 叶祚莲[1] 施志福[1] 吕旭日[1] 

机构地区：[1]泉州师范学院化学与生命科学学院,福建泉州362000

出　　处：《泉州师范学院学报》2010年第2期63-65,共3页Journal of Quanzhou Normal University

基　　金：福建省大学生创新基金资助(2008cxsy02)

摘　　要：研究不同pH值(2.0,3.0,4.0,5.0,5.8)的模拟酸雨胁迫1,3,5 d及恢复处理3,5 d后对洋葱根组织过氧化氢酶、超氧化物歧化酶活性以及丙二醛含量的影响.结果显示:过氧化氢酶活力在胁迫早期表现为诱导而后抑制,随即达到平衡;酸雨胁迫初期超氧化物歧化酶活性极显著地高于对照组,随着胁迫时间的延长,pH低于4.0的胁迫超氧化物歧化酶的活性均显著下降;丙二醛含量在受胁迫全程都显著增加.In this study,effects of simulated acid rain of different pH value of 2.0,3.0,4.0,5.0,and 5.8 on activity of catalase（CAT）,activity of superoxidedismutase（SOD）,and content of propanediol（MDA） in root tips of onion（Allium cepal.） were evaluated after pre-treated for 1,3,and 5 days and post-treated for 3,and 5 days.The results show that：（1） CAT activity is induced firstly,then regresses,and finally reaches its balance;（2） SOD activity is significantly higher than control groups in the primarily stage of simulated acid rain treatment,and SOD activity degrades significantly when pH value is below 4.0;（3） MDA content is significantly high when treated with acid rain.

关 键 词：模拟酸雨 洋葱 过氧化氢酶 过氧化物酶 丙二醛 

分 类 号：Q948[生物学—植物学]