水田土壌中のメタン生成・酸化細菌の特徴と生態(<特集$gt;「地球大気変動と微生物」)

概要

論文の詳細を見る
Paddy fields are one of the main sources for methane emission of a global scale. The magnitude of methane emission is a net result of methane production and the oxidation rate. Methanosarcina sp., Methanothrix sp., Methanobacterium sp. and Methanobrevibacter arboriphilicus have been isolated from paddy field soils. Populations of methanogens in paddy soil are about 10^3〜10^6/g dry soil, and stay almost constant during entire season of flooded rice field soil and drained soil. A large number of sulfate reducers are present in paddy soils. In the absence of sulfate, sulfate reducers are important anaerobic bacteria to degrade organic acids and alcohols to acetate by syntrophic association with hydrogenotrophic methanogens. The bacterial number of methanotrophs are about 10^4〜10^5 cells/g dry soil in paddy field soils. The methanotrophs isolated were gram-negative, oxidase-positive and rod- shaped bacteria, and belonged to type II methanotrophs.
日本微生物生態学会の論文
1998-03-31