As(V) Resistance and Reduction by Bacteria and Their Performances in As Removal from As-Contaminated Soils
| Autor: | Peng Gao, Shiming Su, Duan Ran, Cuixia Wu, Xi-bai Zeng, Yanan Wang, Ling-yu Bai |
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| Rok vydání: | 2017 |
| Předmět: |
DNA
Bacterial 0301 basic medicine Arsenites 010501 environmental sciences DNA Ribosomal 01 natural sciences Applied Microbiology and Biotechnology Microbiology Soil 03 medical and health sciences chemistry.chemical_compound Pseudomonas RNA Ribosomal 16S Drug Resistance Bacterial Cluster Analysis Soil Pollutants Food science Phylogeny 0105 earth and related environmental sciences Arsenite biology Arsenate Soil chemistry Soil classification Sequence Analysis DNA General Medicine biology.organism_classification 16S ribosomal RNA Soil contamination 030104 developmental biology chemistry Arsenates Oxidation-Reduction Bacteria |
| Zdroj: | Current Microbiology. 74:1108-1113 |
| ISSN: | 1432-0991 0343-8651 |
| Popis: | Bacteria capable of arsenate [As(V)] reduction can be used for remediation of As-contaminated soils via bio-extraction. In this study, As-resistant bacteria were isolated and their abilities to resist and reduce As(V) as well as As bio-extracted from soils naturally contaminated with As were studied. The results indicated that three isolates (2-2, 4-3, and 8-5) showed greater abilities to resist As(V) than other isolates. When the isolates were exposed to 10 mg L−1 As(V), As(V) contents decreased, while arsenite [As(III)] increased over time. In comparison, isolates 2-2 and 4-3 completely reduced As(V) into As(III) within 6 h. According to phylogenetic analysis of the 16S rRNA gene, isolates 2-2, 4-3, and 8-5 were most closely related to Pseudomonas taiwanensis, P. monteilii, and Pseudomonas sp., respectively. Total As contents in soils significantly (P |
| Databáze: | OpenAIRE |
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