Lack of Production of Electron-Shuttling Compounds or Solubilization of Fe(III) during Reduction of Insoluble Fe(III) Oxide by Geobacter metallireducens
Studies with the dissimilatory Fe (III)-reducing microorganism Geobacter metallireducens
demonstrated that the common technique of separating Fe (III)-reducing microorganisms
and Fe (III) oxides with semipermeable membranes in order to determine whether the Fe (III)
reducers release electron-shuttling compounds and/or Fe (III) chelators is invalid. This
raised doubts about the mechanisms for Fe (III) oxide reduction by this organism. However,
several experimental approaches indicated that G. metallireducens does not release …
demonstrated that the common technique of separating Fe (III)-reducing microorganisms
and Fe (III) oxides with semipermeable membranes in order to determine whether the Fe (III)
reducers release electron-shuttling compounds and/or Fe (III) chelators is invalid. This
raised doubts about the mechanisms for Fe (III) oxide reduction by this organism. However,
several experimental approaches indicated that G. metallireducens does not release …
Abstract
Studies with the dissimilatory Fe(III)-reducing microorganismGeobacter metallireducens demonstrated that the common technique of separating Fe(III)-reducing microorganisms and Fe(III) oxides with semipermeable membranes in order to determine whether the Fe(III) reducers release electron-shuttling compounds and/or Fe(III) chelators is invalid. This raised doubts about the mechanisms for Fe(III) oxide reduction by this organism. However, several experimental approaches indicated that G. metallireducens does not release electron-shuttling compounds and does not significantly solubilize Fe(III) during Fe(III) oxide reduction. These results suggest that G. metallireducens directly reduces insoluble Fe(III) oxide.
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