Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s00284-014-0539-2
Volltext Shareable Link
Titel (primär) Metabolic efficiency of Geobacter sulfurreducens growing on anodes with different redox potentials
Autor Bosch, J.; Lee, K.-Y.; Hong, S.-F.; Harnisch, F. ORCID logo ; Schröder, U.; Meckenstock, R.U.
Quelle Current Microbiology
Erscheinungsjahr 2014
Department UMB
Band/Volume 68
Heft 6
Seite von 763
Seite bis 768
Sprache englisch
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UFZ Querschnittsthemen RU4;
Abstract Microorganisms respiring Fe(III) in the environment face a range of redox potentials of the prospective terminal ferric electron acceptors, because Fe(III) can be present in different minerals or organic complexes. We investigated the adaptation of Geobacter sulfurreducens to this range by exposing the bacteria to different redox potentials between the electron donor acetate and solid, extracellular anodes in a microbial fuel-cell set-up. Over a range of anode potentials from −0.105 to +0.645 V versus standard hydrogen electrode, G. sulfurreducens produced identical amounts of biomass per electron respired. This indicated that the organism cannot utilize higher available energies for energy conservation to ATP, and confirmed recent studies. Either the high potentials cannot be used due to physiological limitations, or G. sulfurreducens decreased its metabolic efficiency, and less biomass per unit of energy was produced. In this case, G. sulfurreducens “wasted” energy at high-potential differences, most likely as heat to fuel growth kinetics.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14742
Bosch, J., Lee, K.-Y., Hong, S.-F., Harnisch, F., Schröder, U., Meckenstock, R.U. (2014):
Metabolic efficiency of Geobacter sulfurreducens growing on anodes with different redox potentials
Curr. Microbiol. 68 (6), 763 - 768 10.1007/s00284-014-0539-2