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| Characteristics of accumulating lead and zinc by diggings plant Pseudostellaria maximowicziana |
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Abstract Effects of Pseudostellaria maximowicziana accumulating Pb and Zn were studied. Pot plant experiment was carried out in the sand growth incubator. Both the biomass of Pseudostellaria maximowicziana in the roots and the shoots and the ratio of root to shoot (W/W) had increased, also the Pb contents of Pseudostellaria maximowicziana and the Zn contents increased as well with increasing of concentrations of Pb and Zn in nutrient solution. The highest Pb contents in the roots and the shoots of Pseudostellaria maximowicziana were 1386.08mg/kg and 1197.93mg/kg respectively, and the Zn contents were 9250.50mg/kg and 8243.15mg/kg respectively. Both Pb and Zn translocation coefficients of Pseudostellaria maximowicziana were less than 1, but both the Pb and Zn enrichment coefficients in roots and shoots of Pseudostellaria maximowicziana were more than 1. The partial correlation analysis indicated that the absorbing of Pb and Zn in roots and shoots of Pseudostellaria maximowicziana could have a synergistic or additive effect.
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Received: 20 June 2009
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