Unexpected diversity of bacteria capable of carbon monoxide oxidation in a coastal marine environment, and contribution of the Roseobacter-associated clade to total CO oxidation

Article Abstract:

The species diversity, phylogenetic affiliations, and physiological activity rates of carbon monoxide-oxidizing microorganisms were investigated, using new isolates from surface waters collected from the coast of New England and type strains from established collection. Based on the density of active CO-oxidizing Roseobacter-associated clade (RAC) cells in natural samples and RAC-specific metabolic activities determined for pure cultures, active CO-oxidizing RAC cells might contribute up to 15 percent of the total CO oxidation occurring in coastal waters.

Analysis, Microbial metabolism, Oxidation-reduction reaction, Oxidation-reduction reactions, Chemical properties

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Physiological, ecological, and phylogenetic characterization of Stappia, a marine CO-oxidizing bacterial genus

Article Abstract:

The biochemical, physiological, and phylogenetic approaches were used to characterize thirteen CO-oxidizing Stappia isolates obtained from existing cultures, macroalgae, or surf samples representing geographically and ecologically diverse habitats. The observation showed that the ability of Stappia isolates to respire nitrate or denitrify, use numerous organics, and function in low to moderate salinities facilitates participation in both aerobic and anaerobic processes in carbon and nitrogen cycling in a wide range of marine environments.

Environmental aspects, Genetic aspects, Marine bacteria, Nitrogen cycle, Carbon cycle (Biogeochemistry), Carbon cycle

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Molecular and culture-based analyses of aerobic carbon monoxide oxidizer diversity

Article Abstract:

The phylogenetic and taxonomic diversity of aerobic CO-oxidizing bacteria significantly expanded through enrichment and isolation of CO oxidizers and through culture based assays of taxa containing putative coxL, but not known to oxidize CO, is reported. Results indicate that other taxa, including certain archaea likely oxidize CO aerobically as well.

Taxonomy (Biology), Bacteria, Aerobic, Aerobic bacteria, Phylogeny, Phenetics

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