TY - JOUR
T1 - Evidence for involvement of an electron shuttle in electricity generation by Geothrix fermentans
AU - Bond, Daniel R.
AU - Lovley, Derek R.
PY - 2005/4
Y1 - 2005/4
N2 - In experiments performed using graphite electrodes poised by a potentiostat (+200 mV versus Ag/AgCl) or in a microbial fuel cell (with oxygen as the electron acceptor), the Fe(III)-reducing organism Geothrix fermentons conserved energy to support growth by coupling the complete oxidation of acetate to reduction of a graphite electrode. Other organic compounds, such as lactate, malate, propionate, and succinate as well as components of peptone and yeast extract, were utilized for electricity production. However, electrical characteristics and the results of shuttling assays indicated that unlike previously described electrode-reducing microorganisms, G. fermentans produced a compound that promoted electrode reduction. This is the first report of complete oxidation of organic compounds linked to electrode reduction by an isolate outside of the Proteobacteria.
AB - In experiments performed using graphite electrodes poised by a potentiostat (+200 mV versus Ag/AgCl) or in a microbial fuel cell (with oxygen as the electron acceptor), the Fe(III)-reducing organism Geothrix fermentons conserved energy to support growth by coupling the complete oxidation of acetate to reduction of a graphite electrode. Other organic compounds, such as lactate, malate, propionate, and succinate as well as components of peptone and yeast extract, were utilized for electricity production. However, electrical characteristics and the results of shuttling assays indicated that unlike previously described electrode-reducing microorganisms, G. fermentans produced a compound that promoted electrode reduction. This is the first report of complete oxidation of organic compounds linked to electrode reduction by an isolate outside of the Proteobacteria.
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U2 - 10.1128/AEM.71.4.2186-2189.2005
DO - 10.1128/AEM.71.4.2186-2189.2005
M3 - Article
C2 - 15812057
AN - SCOPUS:17444394516
SN - 0099-2240
VL - 71
SP - 2186
EP - 2189
JO - Applied and environmental microbiology
JF - Applied and environmental microbiology
IS - 4
ER -