Effect of arsenite and growth in biofilm conditions on the evolution of Thiomonas sp. CB2.

ABSTRACT: Thiomonas bacteria are ubiquitous at acid mine drainage sites and play key roles in the remediation of water at these locations by oxidizing arsenite to arsenate, favouring the sorption of arsenic by iron oxides and their coprecipitation. Understanding the adaptive capacities of these bacteria is crucial to revealing how they persist and remain active in such extreme conditions. Interestingly, it was previously observed that after exposure to arsenite, when grown in a biofilm, some strains of Thiomonas bacteria develop variants that are more resistant to arsenic. Here, we identified the mechanisms involved in the emergence of such variants in biofilms. We found that the percentage of variants generated increased in the presence of high concentrations of arsenite (5.33 mM), es

SUBMITTER: Freel KC 

PROVIDER: S-EPMC7660254 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature