Previous Article | Next Article ![]()
Applied and Environmental Microbiology, April 2004, p. 2551-2555, Vol. 70, No. 4
0099-2240/04/$08.00+0 DOI: 10.1128/AEM.70.4.2551-2555.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.
Biology Department,1 Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543,2 Institute for Biology and Chemistry of the Ocean (ICBM), Oldenburg University, Oldenburg, Germany 26110,3 Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 275994
Received 9 July 2003/ Accepted 2 January 2004
The chemical stress factors for microbial life at deep-sea hydrothermal vents include high concentrations of heavy metals and sulfide. Three hyperthermophilic vent archaea, the sulfur-reducing heterotrophs Thermococcus fumicolans and Pyrococcus strain GB-D and the chemolithoautotrophic methanogen Methanocaldococcus jannaschii, were tested for survival tolerance to heavy metals (Zn, Co, and Cu) and sulfide. The sulfide addition consistently ameliorated the high toxicity of free metal cations by the formation of dissolved metal-sulfide complexes as well as solid precipitates. Thus, chemical speciation of heavy metals with sulfide allows hydrothermal vent archaea to tolerate otherwise toxic metal concentrations in their natural environment.
Contribution number 10928 of the Woods Hole Oceanographic Institution.
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»