Pedosphere 13(4): 359--366, 2003
ISSN 1002-0160/CN 32-1315/P
©2003 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Uptake, distribution and accumulation of copper in two ecotypes of elsholtzia |
JIANG Li-Ying1,2 , YANG Xiao-E1, YE Zheng-Qian1 and SHI Wei-Yong1 |
1 College of Environmental and Resources Sciences, Zhejiang University, Huajiachi Campus, Hangzhou 310029 (China). E-mail: jiangly111311@sina.com
2 College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310034 (China) |
| ABSTRACT |
| Two ecotypes of Elsholtzia, Elsholtzia splendens and E. argyi, are dominant plants growing on Cu and Pb-Zn smelters, respectively. Samples of the two ecotypes and the corresponding soils from fields of a copper mining area and a Pb-Zn mining area of Zhejiang Province, China, were analyzed to investigate Cu or Zn tolerance of these two ecotypes. Effects of nine Cu levels (0, 5, 10, 20, 40, 80, 160, 240 and 320 mg Cu L-1 as CuSO4·5H2O) on growth and uptake, translocation and accumulation of Cu in these two ecotypes were examined in a solution culture experiment. The experimental results showed that dry weights (DW) of shoots and roots were depressed, and growth of E. splendens was less depressed than that of E. argyi when treated with ≥ 5 mg Cu L-1. Concentrations of Cu in shoots of E. splendens and E. argyi exceeded 1 000 mg kg-1 DW at ≥ 40 mg Cu L-1. The maximum Cu accumulated in the shoots of Cu-treated E. splendens and E. argyi reached 101 and 142 μg plant-1. Furthermore, analysis of plant samples from the fields showed that these two ecotypes can tolerant excess heavy metals and produced high dry matter, and E. splendens can accumulate 11.7 mg Cu plant-1 grown on the Cu smelter. Therefore, E. splendens and E. argyi could be good plants for phytoremediation. |
| Key Words: copper, Elsholtzia argyi, lsholtzia splendens |
| Citation: Jiang, L. Y., YANG Xiao-E, Ye, Z. Q. and Shi, W. Y. 2003. Uptake, distribution and accumulation of copper in two ecotypes of elsholtzia. Pedosphere. 13(4): 359-366. |
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