EDTA对镉胁迫下小白菜幼苗保护酶活性的影响  

Effects of EDTA on the Protective Enzymatic Activities of Brassica Campestris L.chinensis under Cadmium Stress

作　　者：赵辉[1] 郝振萍[1] 

机构地区：[1]金陵科技学院园艺学院,江苏南京210038

出　　处：《金陵科技学院学报》2015年第3期73-77,共5页Journal of Jinling Institute of Technology

基　　金：金陵科技学院博士科研启动基金(40610029)

摘　　要：以3种小白菜为试验材料,探讨了乙二胺四乙酸(EDTA)对镉胁迫下小白菜幼苗保护酶活性的影响。结果表明:外施一定浓度的EDTA后,可以缓解镉胁迫对小白菜造成的伤害;当EDTA浓度为7.5 mmol·L-1时,小白菜SOD、POD酶活性最高,MDA含量最低;当EDTA浓度为5mmol·L-1时,CAT酶活性最高;不同品种抗性表现不同,供试的3种小白菜品种中,抗热605的抗性最强。Three species of Brassica campestris L. chinesis were used in this study to learn the effects of EDTA on the protective enzymatic activities of seedling under cadmium stress. The results showed that EDTA reduced the hurt from cadmium stress under special concentration. When the EDTA concentration was 7.5 mmol· L-1 , the activities of SOD and POD were at their highest level and the content of MDA was the lowest. When the EDTA concentration was 5 mmol· L-1 , the activity of CAT was the highest. Different species showed different reactions to cadmium stress, among which kangre 605 was the best during three species.

关 键 词：EDTA 镉胁迫 小白菜 保护酶 

分 类 号：S634.3[农业科学—蔬菜学]