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Applied and Environmental Microbiology, September 2003, p. 5702-5706, Vol. 69, No. 9
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.9.5702-5706.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Diversion of Electron Flow from Methanogenesis to Crystalline Fe(III) Oxide Reduction in Carbon-Limited Cultures of Wetland Sediment Microorganisms

Eric E. Roden*

Department of Biological Sciences, The University of Alabama, Tuscaloosa, Alabama 35487-0206

Received 17 January 2003/ Accepted 26 May 2003

Electron flow in acetate-limited cultures of wetland sediment microorganisms was diverted from methane production to Fe(III) reduction in the presence of crystalline Fe(III) oxides at surface area loadings equivalent to that of amorphous Fe(III) oxide. The results indicate that inferences regarding the ability of microbial Fe(III) oxide reduction to compete with other terminal electron-accepting processes in anoxic soils and sediments should be based on estimates of bulk microbially available surface site abundance rather than assumed thermodynamic properties of the dominant oxide phase(s) in the soil or sediment.

* Mailing address: Department of Biological Sciences, The University of Alabama, A122 Bevill Bldg., 7th Ave., Tuscaloosa, AL 35487-0206. Phone: (205) 348-0556. Fax: (205) 348-1403. E-mail: eroden{at}bsc.as.ua.edu.

Applied and Environmental Microbiology, September 2003, p. 5702-5706, Vol. 69, No. 9
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.9.5702-5706.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Hori, T., Noll, M., Igarashi, Y., Friedrich, M. W., Conrad, R. (2007). Identification of Acetate-Assimilating Microorganisms under Methanogenic Conditions in Anoxic Rice Field Soil by Comparative Stable Isotope Probing of RNA. Appl. Environ. Microbiol. 73: 101-109 [Abstract] [Full Text]  


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