Diversity of thiosulfate-oxidizing bacteria from marine sediments and hydrothermal vents ...

• Main Authors: Moser, D.P., Brinkhoff, T., Rethmeier, J., Muyzer, G., Teske, A., Jannasch, H.W.
• Format: Text
• Language: English
• Published: American Society for Microbiology 2000
• Subjects: Antarctic; Galapagos; Antarc*
• Online Access: https://dx.doi.org/10.17615/55ds-0958; https://cdr.lib.unc.edu/concern/articles/7p88cs006

Species diversity, phylogenetic affiliations, and environmental occurrence patterns of thiosulfate-oxidizing marine bacteria were investigated by using new isolates from serially diluted continental slope and deep-sea abyssal plain sediments collected off the coast of New England and strains cultured previously from Galapagos hydrothermal vent samples. The most frequently obtained new isolates, mostly from 103- and 104-fold dilutions of the continental slope sediment, oxidized thiosulfate to sulfate and fell into a distinct phylogenetic cluster of marine alpha-Proteobacteria. Phylogenetically and physiologically, these sediment strains resembled the sulfate-producing thiosulfate oxidizers from the Galapagos hydrothermal vents while showing habitat-related differences in growth temperature, rate and extent of thiosulfate utilization, and carbon substrate patterns. The abyssal deep-sea sediments yielded predominantly base-producing thiosulfate-oxidizing isolates related to Antarctic marine Psychroflexus ...