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| Phytoextraction of heavy metals and characteristics of the rhizosphere bacterial community of Taxus wallichiana var. mairei on multi-metal (cadmium and copper) -contaminated soil |
| Received:March 29, 2019 |
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| KeyWord:Taxus wallichiana var. mairei;heavy metal;soil;economic value;bacterial community |
| Author Name | Affiliation | E-mail | | WEI Shuai | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | Wolde Tefera Beri | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | WANG Run-ze | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | LIN Zhi | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | XIE Ruo-han | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | QIAO Ya-bei | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | LU Ling-li | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | TIAN Sheng-ke | Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China | tiansk@zju.edu.cn |
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| Abstract: |
| The economic utilization of heavy-metal-contaminated soil is an important research topic in the field of land resource utilization. We conducted a field experiment on cadmium (Cd) and copper (Cu) soil to investigate the influence of multi-contaminated conditions on the economic value of the soil. 16S rRNA gene sequencing combined with inductively coupled plasma-mass spectrometry were applied to analyze the rhizosphere bacterial community structure and concentrations of Cd/Cu in different tissues of Taxus wallichiana var. mairei under multi-metal (Cd, Cu) stress. Cultivation of T. wallichiana var. mairei significantly changed the soil bacterial diversity, in which bacterial alpha diversity was significantly reduced in the rhizosphere. There was an obvious difference in the bacterial community structure between the rhizosphere and bulk compartment. Several key taxa from the phyla Alphaproteobacteria (Sphingobium and Kaistobacter), Betaproteobacteria (Oxalobacteraceae and Comamonadaceae), Gammaproteobacteria (Acinetobacter), and Bacteroidetes (Sphingobacteriaceae) were especially abundant in the rhizosphere of T. wallichiana var. mairei. PICRUSt analysis predicted a high relative abundance of functional genes related to transporters, amino metabolism, and phosphate metabolism in the rhizosphere of T. wallichiana var. mairei. The total and available concentrations of Cd and Cu in the rhizosphere were significantly reduced by 18.8% and 55.1%, respectively, after planting T. wallichiana var. mairei. Collectively, these results demonstrate that a specific bacterial community structure is formed in the rhizosphere of T. wallichiana var. mairei, which has a beneficial effect on the phytoextraction of Cd and Cu in the rhizosphere soils. |
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