外源ASA对菹草(Potamogeton crispus)抗Cd^(2+)毒害的实验分析  

Experimental Analysis in Resistance of Toxic Effects of Cd^(2+) on Potamogeton crispus Induced by Exogenous Acetosalicylic Acid

作　　者：武晓燕[1] 施国新[1] 徐勤松[1] 王春涛[1] 王学[1] 马广岳[1] 胡金朝[1] 吴国荣[1] 

机构地区：[1]南京师范大学生命科学院,南京210097

出　　处：《湖泊科学》2005年第1期87-92,共6页Journal of Lake Sciences

基　　金：国家自然科学基金(30370083);教育部科学技术研究重点项目(010143);江苏省教育厅自然科学基金(03KJB180062);江苏省重点实验室开放基金项目联合资助.

摘　　要：实验以高等水生沉水植物菹草为材料,研究在不同浓度Cd2+毒害条件下外施乙酰水杨酸(ASA)对菹草叶中叶绿素含量、可容性蛋白含量、O2+产生速率、保护酶--超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性的影响.结果表明,施用ASA可以显著提高叶绿素和可溶性蛋白的含量,增强保护酶的活性,降低O2+产生速率,从而减轻了重金属Cd2+胁迫对植物体造成的伤害.Changes of chlorophyll content, soluble protein content , 02+ generating rate and activity of protective enzymes (SOD, POD, CAT) in leaves of Potamogeton crispus Linn. under different concentration gradient of Cd2 + stress or exogenous acetosalicylic acid treatment were studied and analyzed. The results showed that exogenous acetosalicylic acid could increase chlorophyll and soluble protein content clearly, and markly enhance activity of protective enzymes. At the same time O2+ generating rate was lower than those of treament under single Cd2+ stress . So it was concluded that acetosalicylic acid could alleviate the toxic effects caused by Cd2 + stress.

关 键 词：产生速率 外源 毒害 保护酶 施用 叶绿素含量 可溶性蛋白 菹草 过氧化氢酶(CAT) 过氧化物酶(POD) 

分 类 号：X173[环境科学与工程—环境科学]