期刊
CURRENT MICROBIOLOGY
卷 77, 期 11, 页码 3661-3670出版社
SPRINGER
DOI: 10.1007/s00284-020-02162-5
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资金
- National Natural Science Foundation of China [31860010]
- Natural Science Foundation of Guangxi Zhuang autonomous region [2018GXNS-FAA138008]
- Science and Technology Program of Guangzhou, China [201804010155]
- Scientific Research Project of Guangxi Normal University [2017BQ015, 2019YR004]
- Ecological Doctoral Program Construction of Guangxi Normal University [EDPC 2018001]
The purpose of this study was to elaborate the characteristics ofPseudomonassp. Cr13, including physiological and biochemical characteristics, optimization of growth conditions, minimum inhibitory concentration of Cr(6+)and resistance to other heavy metals, removal efficiency of Cr6+, and antibiotics sensitivity. A strainPseudomonassp. Cr13 was screened from mine-contaminated soils, which could tolerate high concentration of Cr6+(up to 250 mg l(-1)) and Cd2+(50 mg l(-1)). The optimum pH, NaCl concentration, and temperature for growth were 6, 10% NaCl, and 30 degrees C, respectively. The removal efficiency of Cr(6+)by strainPseudomonassp. Cr13 was studied. The removal efficiency of Cr(6+)decreased with the increased concentration of Cr6+. Under the optimal conditions, the maximum of the removal rate can reach up to 94.26% in contaminated soils. In addition, antibiotics sensitivity of this strain was investigated. It was found that this strain was sensitive to nine types of antibiotics, which would lay a good foundation for the choice of selective marker in genetic engineering modification of this strain. The results in this article would lay a good foundation for the bioremediation of heavy metals pollution in the future.Pseudomonassp. Cr13 can tolerate high concentration of Cr(6+)and partially remove Cr6+, which make Cr13 an attractive option for the bioremediation of heavy metal chromium (Cr). Our findings suggest thatPseudomonassp. Cr13 is a potential bacterium with the ability of bioremediation of heavy metal Cr.
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