镉·硒单一及联合作用对大蒜根尖细胞微核的影响  

Individual and Combined Effects of Cadmium and Selenium on Micronuclei of Allium sativum

作　　者：黄白飞[1] 辛俊亮[1] 向琳霞 宋杞 魏帆[1] 朱诗雅 刘安[1] 伏浩[1] 

机构地区：[1]湖南工学院安全与环境工程系,湖南衡阳421002

出　　处：《安徽农业科学》2017年第26期18-20,共3页Journal of Anhui Agricultural Sciences

基　　金：湖南省教育厅优秀青年项目(17B067);湖南工学院公派出国留学人员专项(HY15037;HY15039);湖南工学院大学生研究性学习和创新性实验计划项目;湖南省大学生研究性学习和创新性实验计划项目

摘　　要：[目的]探讨Cd、Se单一处理及复合处理对大蒜根尖细胞微核的影响。[方法]测量不同Cd、Se处理后根的生长速度及微核率。[结果]Cd(1.0200.0 mg/L)对大蒜根有毒害作用,抑制了根的生长,同时诱发细胞微核的形成,浓度越大毒害程度越大。Cd、Se联合合处理时,Se在低浓度(<0.5 mg/L)下,联合处理的微核率小于单一Cd处理;但是Se浓度超过0.5 mg/L后,反而加剧了Cd对大蒜根尖的危害。[结论]低浓度Se能缓解Cd的毒性作用,高浓度Se加强Cd的毒性作用。[Objective]The aim was to study the individual and combined effects of cadmium and selenium on the micronuclei of Allium sativum.[Method]We determined the root growth rate and the micronucleus rate.[Result]The Cd（1.0-200.0 mg/L） had toxic effect on garlic root.The root growth was inhibited and the cell micronucleus formed after Cd treatment.The degree of Cd poisoning on root increased as Cd concentration increased.Under the combined treatment of Se and Cd,the micronucleus rates of combined treatments with a low concentration（〈0.5 mg/L） of Se were lower than the sole Cd treatment.However,the high levels of Se（〉0.5 mg/L） could increase the damage of Cd on root tip of garlic.[Conclusion] Se can relieve the toxic effect of Cd on garlic root under low concentration and aggravate the toxic effect under high concentration.

关 键 词：镉 硒 大蒜 细胞微核 根生长速度 

分 类 号：S633.4[农业科学—蔬菜学]