Complete oxidation of toluene under strictly anoxic conditions by a new sulfate-reducing bacterium

Article Abstract:

The isolation of a marine sulfate-reducing bacterium that anaerobically degrades toluene was reported. It was demonstrated by measurement of degradation balance that toluene was completely oxidized to CO2. The presence of carbon monoxide dehydrogenase and formate dehydrogenase indicated a terminal oxidation of acetyl coenzyme A via the CO dehydrogenase pathway. However, the results of the consumption of hypothetical intermediates do not support a degradation of toluene via the introduction of a hydroxyl group into the ring. The designation Desulfobacula toluolica is proposed for the new sulfate-reducing bacterium.

Physiological aspects, Oxidation, Physiological, Physiological oxidation, Toluene

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Degradative capacities an 16S rRNA-targeted whole-cell hybridization of sulfate-reducing bacteria in an anaerobic enrichment culture utilizing alkylbenzenes from crude oil

Article Abstract:

Hybridization of nucleic acids from a sulfate-enrichment culture growing anaerobically on crude oil revealed the presence of a species of sulfate-reducing bacteria. Fluorescent labeling studies showed that the bacteria do not utilize aromatic hydrocarbons, indicating that the cells do not belong to known Desulfovibrio species. More than 95% of the cells in the culture hybridized with a modified probe, suggesting that the cells may belong to the oxidizing, alkylbenzene-utilizing sulfate-reducing species.

Petroleum

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Anaerobic oxidation of o-xylene, m-xylene, and homologous alkylbenzenes by new types of sulfate-reducing bacteria

Article Abstract:

Two new types of sulfate-reducing bacteria which can oxidize alkylbenzenes, o- and m-xylenes have been isolated. The alkylbenzenes were consumed during the growth of the sulfate-reducing enrichment culture with crude oil as the only source of the organic substrates. Two mesophilic, rod-shaped strains, oXyS1 and mXyS2 were detected with o- and m-xylenes as the organic substrates. The resulting 16S rRNA analysis revealed that strains belong to the delta subclass of Proteobacteria.

Environmental aspects, Sulfur bacteria, Anaerobic bacteria, Xylene, Xylenes, Alkylbenzene

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