A newly isolated heterotrophic bacterium, Xanthomonas sp. DY44, to oxidize hydrogen sulfide to polysulfide

摘要: A newly isolated heterotrophic bacterium,Xanthomonas sp. DY44, was found to be capable of oxidizing hydrogen sulfide (H2S). Cells made non-viable by heat treatment (120°C, 20 min) did not show H2S oxidation. However, both cells sterilized γ-rays irradiation and cell-free extract oxidized H2S, suggesting the existence heat-labile intracellular enzymatic system for AsXanthomonas DY44 exhibited no autotrophic growth with in basal mineral medium, oxidation judged a consequence chemolithotrophic activity. Using X-rays photoelectron spectroscopy (XPS), metabolic product assessed polysulfide.