Production and consumption of nitric oxide by three methanotrophic bacteria

Article Abstract:

Production and consumption of nitric oxide by three different groups of methanotrophs involved production of small amounts of nitrous oxide as well. However, Methylobacter strain T20 produced large amounts of nitric oxide originating from reduction of nitrate to nitrite, which then decomposing to nitric oxide.

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Differential inhibition by allylsulfide of nitrification and methane oxidation in freshwater sediment

Article Abstract:

The inhibition of nitrification in freshwater sediment slurries by allylsulfide is more than the inhibition of methane oxidation. This inhibition is due to a restricting of the growth of methanotrophs, such as Methylosinus trichosporium. Methane monooxygenase activity is unaffected by high concentrations of allylsulfide. Nitrapyrin, allylthiourea, CH3F, and C2H2 present in the freshwater sediment restrict nitrification and oxidation. Allylsulfide is the strongest inhibitor of nitrification.

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Atmospheric methane consumption by forest soils and extracted bacteria at different pH values

Article Abstract:

Experiments were conducted to examine the effect of pH on atmospheric methane consumption using slurries of forest soils and bacteria extracted from the same soils. Methane consumption activity was observed from alkaline soils with a large range of pH. Although similar responses were observed between bacteria obtained from three soil types, extracted samples have narrower pH ranges in comparison to those obtained from soil slurries. It was also observed that acidic soils displayed the highest methane consumption.

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