Pb^(2+)、As^(3+)污染对黄瓜种苗生长发育及防御酶的影响  

Effect of Lead and Arsenic Pollution on Cucumber Seedling Growth and Germination and Protective Enzymes

作　　者：石爽[1] 魏晓晴[2] 胡晓静[3] 姜华[1] 

机构地区：[1]辽宁师范大学生命科学学院,辽宁大连116029 [2]大连医科大学中心实验室,辽宁大连116034 [3]辽宁出入境检验检疫局,辽宁大连116001

出　　处：《辽宁农业科学》2009年第2期1-5,共5页Liaoning Agricultural Sciences

基　　金：教育部留学回国人员科研启动基金(教外司留[2005]383号)

摘　　要：以水培法研究了Pb2+、As3+对黄瓜种子萌发及生长的影响、确定了二者的毒害临界浓度,以比色法测定了4种防御酶活性。试验结果表明:Pb2+的毒害临界浓度范围为10~20 mg/L、As3+为1.5~2 mg/L。4种防御酶活性均高于对照,酶活变化趋势相似,但比较酶活性最大值,Pb2+处理比As3+处理的酶活性高。In this paper, by means of hydroponic method, the effect of lead and arsenic pollution on the process of cucumber seedling germination and growth were studied;the critical toxic concentrations of the two were obtained and the activity of four protective enzymes were examined by colorimetry. The results showed that： the critical value of lead and arsenic toxicity concentration in nutrient solution were 10 -20 mg/L and 1.5 - 2 mg/L respectively. The activities of four defensive enzymes are higher than the control, with a similar trend. However, the maximum activity of the defensive enzymes were higher in the treatment of Pb^2＋ than in As^3＋ .

关 键 词：重金属污染 毒害临界浓度 防御酶 

分 类 号：S642.201[农业科学—蔬菜学]