title: Enrichment and isolation of ferric-iron- and humic-acid-reducing bacteria.
abstract: In anoxic habitats, ferric iron oxides and humic acids are widespread, and ferric-iron- and humic-acid-reducing microorganisms presumably play an important role in the oxidation of organic matter. Representative strains of ferric-iron- or humic-acid-reducing bacteria were isolated from a wide range of freshwater or marine environments. Most of them are strict anaerobes, and facultatively anaerobic microorganisms reduce ferric iron oxides or humic acids only after oxygen has been consumed. Hence, anaerobic techniques have to be used for the preparation of media as well as for the cultivation of microorganisms. Furthermore, special caution is needed in the preparation of ferric iron oxides and humic acids.
authors.affiliation: Department of Geomicrobiology, Center for Applied Geosciences, University of Tübingen, Germany.
authors.forename: Kristina L
authors.initials: KL
authors.lastname: Straub
authors.forename: Andreas
authors.initials: A
authors.lastname: Kappler
authors.forename: Bernhard
authors.initials: B
authors.lastname: Schink
mesh_terms: D001421:Bacteria, Anaerobic / Q000254:growth & development / Q000302:isolation & purification* / Q000378:metabolism; D003470:Culture Media; D004579:Electron Transport; D005290:Ferric Compounds / Q000737:chemistry / Q000378:metabolism*; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D012995:Solubility
chemical_list: D003470:Culture Media; D005290:Ferric Compounds; D006812:Humic Substances; C000499:ferric oxide; C092844:ferric oxyhydroxide