Accumulation of Zinc, Cadmium, and Lead in Four Populations of Sedum alfredii Growing on Lead/Zinc Mine Spoils  

作　　者：Dong-Mei Deng Jin-Chuan Deng Jin-Tian Li Jun Zhang Min Hu Zhou Lin Bin Liao 

机构地区：[1]School of Life Sciences and State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou 510275, China [2]Department of Biological and Chemical Engineering, Guangxi University of Technology, Liuzhou 545006, China [3]Department of Environmental Science and Engineering, Zhongkai Agrotechnical College, Guangzhou 510225, China

出　　处：《Journal of Integrative Plant Biology》2008年第6期691-698,共8页植物学报（英文版）

基　　金：the Hi-Tech Research and Development Program (863) of China (2006AA06Z359);the National Natural Science Foundation of China(40471117 and 30400053) ;the Team Work Project of the Natural Science Foundation of Guangdong Province (06202438).

摘　　要：Sedum alfredii Hance is a newly reported zinc （Zn） and cadmium （Cd） hyperaccumulator native to China. In this study, four populations of S. alfredii were collected from Yejiwei （YJW）, Jinchuantang （JCT） and Qiaokou （QK） lead （Pb）lZn mines located in Hunan Province as well as Quzhou （QZ） PblZn mine located in Zhejiang Province for exploring the intraspecies difference of this plant in metal accumulation. Although they grew in the PblZn spoils with relatively similar levels of Zn, Cd and Pb, remarkable differences among the four populations in tissue heavy metal concentrations were observed. The shoot Zn concentration of QZ population （11 116mglkg） was highest and nearly five times higher than that of the JCT population （1 930 mg/kg）. Furthermore, the shoot Cd concentration observed in the QZ population （1 090 mg/kg） was also highest and 144 times higher than that found in the JCT population （7.5 mg/kg）. As for Pb concentrations in the shoot of different populations, a fourfold difference between the highest and the lowest was also found. Such difference on metal accumulation was population-specific and may be significantly explained by differences in the soil properties such as pH, organic matter （OM）, and electrical conductivity （EC）. Taking biomass and metal concentration in plants into consideration, the QZ, YJW and QK populations may have high potential for Zn phytoremediation, the QZ population may have the highest potential in Cd phytoremediation, and the QK population may be the most useful in Pb phytoremediation.Sedum alfredii Hance is a newly reported zinc （Zn） and cadmium （Cd） hyperaccumulator native to China. In this study, four populations of S. alfredii were collected from Yejiwei （YJW）, Jinchuantang （JCT） and Qiaokou （QK） lead （Pb）lZn mines located in Hunan Province as well as Quzhou （QZ） PblZn mine located in Zhejiang Province for exploring the intraspecies difference of this plant in metal accumulation. Although they grew in the PblZn spoils with relatively similar levels of Zn, Cd and Pb, remarkable differences among the four populations in tissue heavy metal concentrations were observed. The shoot Zn concentration of QZ population （11 116mglkg） was highest and nearly five times higher than that of the JCT population （1 930 mg/kg）. Furthermore, the shoot Cd concentration observed in the QZ population （1 090 mg/kg） was also highest and 144 times higher than that found in the JCT population （7.5 mg/kg）. As for Pb concentrations in the shoot of different populations, a fourfold difference between the highest and the lowest was also found. Such difference on metal accumulation was population-specific and may be significantly explained by differences in the soil properties such as pH, organic matter （OM）, and electrical conductivity （EC）. Taking biomass and metal concentration in plants into consideration, the QZ, YJW and QK populations may have high potential for Zn phytoremediation, the QZ population may have the highest potential in Cd phytoremediation, and the QK population may be the most useful in Pb phytoremediation.

关 键 词：heavy metal HYPERACCUMULATION PHYTOREMEDIATION population Sedum alfredii 

分 类 号：X503.23[环境科学与工程—环境工程]