title: Control of sulfidogenesis through bio-oxidation of H2S coupled to (per)chlorate reduction.
abstract: We investigated H2S attenuation by dissimilatory perchlorate-reducing bacteria (DPRB). All DPRB tested oxidized H2S coupled to (per)chlorate reduction without sustaining growth. H2S was preferentially utilized over organic electron donors resulting in an enriched (34S)-elemental sulfur product. Electron microscopy revealed elemental sulfur production in the cytoplasm and on the cell surface of the DPRB Azospira suillum. Based on our results, we propose a novel hybrid enzymatic-abiotic mechanism for H2S oxidation similar to that recently proposed for nitrate-dependent Fe(II) oxidation. The results of this study have implications for the control of biosouring and biocorrosion in a range of industrial environments.
authors.forename: Patrick
authors.initials: P
authors.lastname: Gregoire
authors.forename: Anna
authors.initials: A
authors.lastname: Engelbrektson
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Hubbard
authors.forename: Zoltan
authors.initials: Z
authors.lastname: Metlagel
authors.forename: Roseann
authors.initials: R
authors.lastname: Csencsits
authors.forename: Manfred
authors.initials: M
authors.lastname: Auer
authors.forename: Mark E
authors.initials: ME
authors.lastname: Conrad
authors.forename: Jürgen
authors.initials: J
authors.lastname: Thieme
authors.forename: Paul
authors.initials: P
authors.lastname: Northrup
authors.forename: John D
authors.initials: JD
authors.lastname: Coates
mesh_terms: D002704:Chlorates / Q000378:metabolism*; D006862:Hydrogen Sulfide / Q000378:metabolism*; D010084:Oxidation-Reduction; D010472:Perchlorates / Q000378:metabolism*; D020560:Proteobacteria / Q000378:metabolism*; D043362:Rhodocyclaceae / Q000378:metabolism
chemical_list: D002704:Chlorates; D010472:Perchlorates; C494474:perchlorate; D006862:Hydrogen Sulfide