Phenotypic and genotypic adaptation of aerobic heterotrophic sediment bacterial communities to mercury stress.

Applied and Environmental Microbiology
Tamar Barkay, Betty H Olson

Abstract

The effects of mercury contamination of lake sediments on the phenotypic and genotypic mercury resistance of the indigenous heterotrophic aerobic bacterial communities were investigated. Strong positive correlations between mercury sediment concentration and the frequency of the gene coding for mercury volatilization (mer) (r = 0.96) or the phenotypic mercury resistance (r = 0.86) of the studied communities suggested that the inheritance via selection or genetic exchange of the mer gene had promoted bacterial adaptation to mercury. Failure to detect the mer gene in one mercury-contaminated sediment where phenotypic expression was low suggested that other mechanisms of resistance may partially determine the presence of mercury-resistant organisms in mercury-contaminated sediment or that the mercury in this particular sediment was very chemically limited in its availability to the microorganisms.

References

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Citations

Feb 1, 1995·Journal of Industrial Microbiology·D R Lovley
Feb 1, 2006·Archives of Microbiology·Seralathan Kamala KannanRamaswamy Krishnamoorthy
Jun 19, 2008·FEMS Microbiology Ecology·Matthew J HoostalJuan L Bouzat
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Nov 30, 2013·Metallomics : Integrated Biometal Science·Gaetano MalgieriCarla Isernia
Jan 1, 1989·Antonie van Leeuwenhoek·M E Lidstrom
Dec 1, 1987·Applied and Environmental Microbiology·T Barkay
Sep 1, 1988·Applied and Environmental Microbiology·R J Steffan, R M Atlas
Sep 1, 1988·Applied and Environmental Microbiology·G S Wickham, R M Atlas
Jan 1, 1988·Applied and Environmental Microbiology·F J GenthnerA W Bourquin
Feb 1, 1989·Applied and Environmental Microbiology·G Y JiS Silver
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Dec 1, 1992·Applied and Environmental Microbiology·W E HolbenJ M Tiedje
Nov 1, 1989·Research in Microbiology·I MirgainH Monteil
Jul 1, 1994·Applied and Environmental Microbiology·M Díaz-RaviñaA Frostegård

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