Fe(III) as an electron acceptor for H2 oxidation in thermophilic anaerobic enrichment cultures from geothermal areas.
Six sustainable enrichment cultures of thermophilic H2-oxidizing microorganisms utilizing Fe(III) as an electron acceptor were obtained from geothermally heated environments located on two continents (America, Eurasia) and on islands in the Northern (Iceland) and Southern (Fiji) hemispheres, demonstrating the wide distribution of these microorganisms. The main products of amorphic Fe(III) oxide reduction were magnetite and siderite. The observed temperature range for Fe(III) reduction in growing cultures was from 55 degrees C to 87 degrees C, extending the known limits for growth of Fe(III)-reducing microorganisms producing extracellular magnetite to nearly 90 degrees C.
Department of Microbiology and Center for Biological Resource Recovery, University of Georgia, Athens 30602, USA.
A I
AI
Slobodkin
J
J
Wiegel
D001421:Bacteria, Anaerobic / Q000378:metabolism*; D005290:Ferric Compounds / Q000378:metabolism*; D006358:Hot Temperature; D006859:Hydrogen / Q000378:metabolism*; D010084:Oxidation-Reduction
D005290:Ferric Compounds; D006859:Hydrogen