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Dependence of arsenic resistance and reduction capacity of Aeromonas hydrophila on carbon substrate.

Authors
  • Min, Di1
  • Wu, Jie2
  • Cheng, Lei2
  • Liu, Dong-Feng3
  • Lau, Tai-Chu4
  • Yu, Han-Qing2
  • 1 CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China; USTC-CityU Joint Advanced Research Center, Suzhou, China; Department of Chemistry, City University of Hong Kong, Hong Kong, China. , (China)
  • 2 CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China. , (China)
  • 3 CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China. Electronic address: [email protected] , (China)
  • 4 USTC-CityU Joint Advanced Research Center, Suzhou, China; Department of Chemistry, City University of Hong Kong, Hong Kong, China. , (China)
Type
Published Article
Journal
Journal of hazardous materials
Publication Date
Aug 03, 2020
Volume
403
Pages
123611–123611
Identifiers
DOI: 10.1016/j.jhazmat.2020.123611
PMID: 32768864
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The high toxicity and prevalence of arsenic in the environment have aroused increasing research interest in understanding the mechanisms of microbial arsenic resistance. A wide spectrum of arsenic resistant microbes with ability of arsenic bio-transformation has been isolated from arsenic-contaminated environments. However, arsenic resistance processes and reduction abilities of microbes under various growth conditions remain poorly understood. In this work, a high correlation between the arsenic resistance and reduction ability of Aeromonas hydrophila and the carbon substrate was identified. Genome analysis suggests that the arsenic resistance system is widely present in Aeromonas genus, and the arsenic resistance was associated with the ars operon. The sensitivity of A. hydrophila to As(V) and As(III) depended heavily on the type of carbon substrate. The upregulated expression of arsA, arsB, arsD and/or downregulated expression of glpF might be responsible for the increased microbial tolerance to As(III). The As(V) reduction rate was also affected by the type of carbon substrate. Our results provide new insights into the impacts of carbon substrate on the arsenic biotoxicity as well as arsenic biotransformation processes. Copyright © 2020 Elsevier B.V. All rights reserved.

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