期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 12, 期 6, 页码 574-585出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226510903353195
关键词
Phytoextraction; hyperaccumulation; heavy metal; contaminated soil
资金
- National 863 Project of China [2006AA06Z359, 2007AA061001]
- National Natural Science Foundation of China [30400053]
- Natural Science Foundation of Guangdong Province [06202438]
Viola baoshanensis has been identified as a Cd-hyperaccumulator, however, its ability to accumulate Pb or Zn is less certain. Therefore, this study focused on determining whether or not V. baoshanensis can accumulate Pb or Zn, by means of field survey, hydroponic and pot experiments. In addition, we also tried to obtain further information on the Cd hyperaccumulating characteristics of this species. Under field conditions, V. baoshanensis accumulated on average 1090 mg Cd kg-1, 1902 mg Pb kg-1 and 3428 mg Zn kg-1 in its shoots, respectively. In hydroponic and pot experiments, V. baoshanensis showed high tolerance to Cd, Pb, and Zn, as well as the ability to accumulate exceptionally high concentrations of the three elements in its shoots (2% Cd, 1% Pb, and 0.5% Zn on a dry matter basis). These results, taken together, suggested that V. baoshanensis is not only a Cd-hyperaccumulator, but also a strong accumulator of Pb and Zn.
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