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| Solubilization of Insoluble Copper and Enhancement of Phytoremediation by Copper-resistant Bacteria Inoculated to Copper-contaminated Soil |
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| KeyWord:copper-resistant bacteria; solubilization; plant-microbial remediation |
| Author Name | Affiliation | | WANG Gui-ping | College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China | | GUO Ming-zhi | College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China | | CHEN Ya-hua | College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China | | SHEN Zhen-guo | College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China | | XIA Yan | College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China |
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| Abstract: |
| This study investigated the effects of two copper（Cu）-resistant bacterial strains, F16a and Fw17a, on insoluble Cu solubilization in different cultures and Cu-contaminated soils, and also evaluated their effects on the phytoremediation of Cu-contaminated soils in a pot experiment. Compared with the control, F16a increased water-soluble Cu concentrations, whereas Fw17a decreased water-soluble Cu in supernatant of N-containing liquid medium with 500 mg·L-1 CuCO3. The magnitude of such change（increase or decrease） in water-soluble Cu concentrations increased with amount of F16a（or Fw17a） inoculums at the beginning. F16a and Fw17a had the greatest effects when exposed to their optimum temperatures. F16a significantly enhanced water-soluble Cu in Cu-contaminated soil, but Fw17a had little effects on water-soluble Cu. Inoculation with F16a significantly increased Cu absorption and accumulation in shoots of Trifolium repensa and Vetiver zizanioides in Cu-contaminated soil. |
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