Biogeochemical studies of metallophytes from four copper-enriched sites along the Yangtze River, China |
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Authors: | M Ye J T Li S N Tian M Hu S Yi B Liao |
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Institution: | (1) School of Life Sciences and State Key Laboratory of Biocontrol, Sun Yat-sen (Zhongshan) University, Guangzhou, 510275 Guangdong, People’s Republic of China;(2) College of Life Sciences, Anhui Agricultural University, Hefei, 230036 Anhui, People’s Republic of China |
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Abstract: | The area along middle and lower reaches of the Yangtze River is one of the biggest Cu belts in China. In the present study,
the metallophytes growing in four copper (Cu)-enriched sites along the Yangtze River were surveyed to get detailed information
about vegetation composition and their Cu uptake characteristics. In all sampling sites, Cu concentrations of soils were high;
whereas the organic matter, acidity and salinity of most soils were on normal levels. Totally 82 plant species belonging to
45 families were recorded. All the species recorded in the present study exhibited high tolerances for Cu although they differed
greatly in their abilities to accumulate Cu. Except for Rumex acetosa and Phytolacca acinosa, most species were Cu-excluders and no Cu hyperaccumulator was found. The Cu translocation factors (TFs) and bioconcentration
factors (BCFs) of the 12 dominant species were fairly low, indicating low concentrations of Cu were translocated to the shoots
of these species. On this basis, the potential utilization of these metallophytes for phytoremediation was discussed. |
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Keywords: | Metallophytes Cu tolerance Vegetation Phytostabilization |
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