玉米种子对铬生态毒害检测的研究  

Studies on toxic effects of trivalent and hexavalent chromium on maizes

作　　者：马新颜[1] 李珊[2] 康维钧[2] 

机构地区：[1]石家庄市疾病预防控制中心,石家庄050011 [2]河北医科大学公共卫生学院,石家庄050017

出　　处：《中国卫生检验杂志》2008年第3期390-392,425,共4页Chinese Journal of Health Laboratory Technology

基　　金：河北省教育厅博士基金(B2004120)

摘　　要：目的:探讨玉米种子对Cr3+和Cr6+的生态毒害检测的毒害浓度和适宜品种。方法:选用3种玉米进行植物发芽毒性试验和根伸长试验,了解不同浓度Cr3+和Cr6+对3个品种玉米种子萌发、根生长及对玉米根尖细胞有丝分裂的影响。结果:Cr3+和Cr6+在5×10-4mol/L^1×10-2mol/L浓度范围内对玉米的毒害作用随培养时间延长和浓度增加毒害加重。5×10-4mol/L、1×10-3mol/L浓度的铬对玉米的生长有轻微的刺激作用。结论:两种价态的铬比较,Cr6+对3种玉米的毒害作用均大于Cr3+。1×10-2mol/L为玉米耐受铬的最高浓度。3种玉米中农大108抗铬毒害能力最强。Objective：To explore a preliminary test for detecting the degree of toxicity from Cr^3＋ and Cr^6＋ to identify the suitable kind of maizes. Methods： The cytotoxic effects of trivalent and hexavalent chromium at different concentrations on seed germination and root tip cells of three kind of maizes were studied. Results： Both trivalent and hexavalent chromium inhibited seed germination and cell division. The degree of toxicity showed a clear positive relation with the concentration and time at 5 ×10^-4 mol/ L - 1 × 10^-2 mol/L. The cell division of the three kind of maizes were stimulated at the concentration of 5 × 10^-4 mol/L - 1 × 10^-3 mol/L. Conclusion：The hexavalent chromium has a stronger toxic effects than trivalent chromium. The three kinds of maizes stop growing with the concentration 1 × 10^-2 mol/L. Nongda 108 has more resistance to the toxic effects of chromium than others.

关 键 词：CR^3+ CR^6+ 发芽 有丝分裂指数 玉米 

分 类 号：X131.3[环境科学与工程—环境科学]