Biodegradation of free phytol by bacterial communities isolated from marine sediments under aerobic and denitrifying conditions

Article Abstract:

Biodegradation of (E)-phytol by bacterial communities isolated from marine sediments of Carteau Bay has been studied at 20 degrees C. under aerobic and denitrifying conditions. The isoprenoid alcohol is metabolized well by the two bacterial types. A (Z)-phytenic acid intermediate is involved. In both aerobic and anaerobic bacterial degradation the first step involves transient production of (E)-phytenal. Although nitrate concentrations in marine sediments are low, denitrifying bacteria seem to have a significant role in mineralization of (E)-phytol.

Australia, France, Statistical Data Included, Environmental aspects, Observations, Molecular microbiology, Alcohols

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Anaerobic degradation of hexadecan-2-one by a microbial enrichment culture under sulfate-reducing conditions

Article Abstract:

Research was conducted to examine the anaerobic degradation of aliphatic hydrocarbon. Hexadecan-2-one, nonadecan-10-one and two pristane photooxidation products were studied under sulfate-reucing conditions. Acting as the sole source of carbon and energy, both hexadecan-2-one and 6,10,14-trimethylpentaecan-2-one were able to grow a microbial enrichment culture from marine sediment. Results confirm the importance of the community of sulfate-reducing bacteria in anoxic environments and in the degradation of hydrocarbons.

Anaerobic bacteria, Bacteriology

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Aerobic and anaerobic metabolism of 6,10,14-trimethylpentadecan-2-one by a denitrifying bacterium isolated from marine sediments

Article Abstract:

The denitrifying bacterium, Marinobacter hydrocarbonoclasticus, isolated from marine sediments, metabolize 6,10,14-trimethylpentadecan-2-one aerobically and anaerobically. Z-3,7-dimethylocten-2-oic acid (compound 2), Z-3,7,11-trimethyldodecen-2-oic acid (compound 3), 4,8,12-trimethyltridecan-1-ol, 4,8,12-trimethyldecanal and 4,8,12-trimethyltridecanoic acid are detected under aerobic conditions. Compounds 2 and 3, and 6,10,14-trimethylpentadecan-2-ol are present under anaerobic conditions.

Analysis, Physiological aspects, Metabolism, Ketones

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