Hg污染对白菜的生态毒理效应研究  

Ecotoxicological Effects of Hg on Brassice rapa

作　　者：王霞[1] 任珺 郭梅莹[1] 刘丽莉[1] 

机构地区：[1]兰州交通大学环境与市政工程学院环境生态研究所,甘肃兰州730070

出　　处：《广东化工》2013年第21期17-18,共2页Guangdong Chemical Industry

基　　金：甘肃省住房与城乡建设厅科技项目(JK2012-59);国家科技型中小企业创新基金项目(12C26216207079)

摘　　要：采用水培方法,分析了白菜种子和幼苗在不同Hg2+处理条件下的富集能力与耐受性,研究表明:白菜对Hg2+的富集能力呈显著差异性。根是主要的富集器官,白菜根和茎的富集量均随着Hg2+浓度增加而增加,呈显著的正相关关系。Hg2+对白菜种子和茎的最高萌发抑制率分别为52.11%、90.54%,白菜根的耐性指数随Hg2+浓度升高而减小。Hg2+抑制白菜体内叶绿素a、叶绿素b与类胡萝卜素的含量,Hg2+对叶绿素a的抑制作用尤为明显。Method of water culture, determination of the Brassice rapa seeds and seedlings under different treatment conditions Hg2＋ of the enrichment capacity and resistance by nature, the results show that： Brassice rapa Hg2＋ concentrations in different conditions, Hg2＋ accumulation ability of showing significant differences.Enrichment of the root is the main organ, Brassice rapa root and stem concentration with the Hg2＋ concentration increases, showing a significant positive correlation. Hg2＋ on seed and stem germination rate was the highest 52.11%, 90.54 %, Brassice rapa root tolerance index in the treatment with Hg2＋ concentration decreases. Hg2＋ inhibition of cabbage chlorophyll a, chlorophyll b and carotenoid content, Hg2＋ inhibition of chlorophyll a especially.

关 键 词：白菜 种子萌发 汞 富集 耐性指数 

分 类 号：X171.5[环境科学与工程—环境科学] X173