Effects of Plant Residue Extract and Cobalamin on Growth and Propionate Production of Propionicimonas paludicola Isolated from Plant Residue in Irrigated Rice Field Soil

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概要

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• Since most of the anaerobic bacterial isolates from rice plant residue in irrigated rice field soil grew slowly or weakly in the medium (PY medium) used, growth factors for the isolates were investigated. Plant residue extract (RE) was prepared by autoclaving plant residue collected from the soil, and RE was added to the medium as a possible source of growth factors. With the addition, growth of the slowly-growing, propionate-producing strains of Propionicimonas paludicola was considerably improved. Lactate was the dominant product of these strains in the presence of lower concentrations of RE. Moreover, amounts of acetate and propionate produced increased in proportion to the RE concentration added. The factor in RE affecting the growth of these strains appeared to be cobalamin, and addition of cobalamin to the medium remarkably improved their growth. With a sufficient amount of cobalamin added, propionate was the dominant product from the onset of fermentation, while lactate was only a minor product. Concentrations of cobalamin in RE were determined using the microbiological method. Almost exactly the same amount of cobalamin was detected in RE prepared from plant residue samples collected in different years. Cobalamin was also detected in extracts of the rice field soil, although the concentrations were much lower than those in RE. It was suggested that these cobalamin-requiring, propionate- producing bacteria survive in rice field soil by using cobalamin supplied by other microbes, which endogenously produce cobalamin and release it into the environment.

• 日本微生物生態学会の論文

著者

• Akasaka Hiroshi

  Faculty Of Agriculture Yamagata University:(present Address)creative Research Initiative 'souse

• UEKI KATSUJI

  Faculty of Agriculture, Yamagata University

• UEKI ATSUKO

  Faculty of Agriculture, Yamagata University

• Ueki A

  Faculty Of Agriculture Yamagata University

• Ueki K

  Faculty Of Agriculture Yamagata University

• Ueki Katsuji

  Faculty Of Agriculture Yamagata University

• Ueki Atsuko

  Faculty Of Agriculture Yamagata University

関連論文

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• Effects of Organic Matter Application, Temperature, and Sunshine Duration on Seasonal and Annual Variations of Methanogenic Activity in Wetland Rice Field Soil
• Sample Preparation for Methanogenic Activities of Heterogeneous Flooded Rice Soils
• Effects of Plant Residue Extract and Cobalamin on Growth and Propionate Production of Propionicimonas paludicola Isolated from Plant Residue in Irrigated Rice Field Soil
• Factors Affecting Seasonal and Vertical Variations in the Methanogenic Activity in Paddy Soil Determined by the Addition of Methanogenic Substrates
• Seasonal Variations in Temperature Dependence of Methane Production in Paddy Soil
• Seasonal Variations in Vertical Distribution of Methanogenic Activity and Fe(II) Content and Relationship between Them in Wetland Rice Field Soil
• Effect of plant biomass incorporation on the bacterial community structure during soil disinfestation(The annual Meeting of the Society in 2011)
• Analysis of bacterial community in the reductive soil disinfestation(The annual Meeting of the Society in 2010)
• Diversification of clostrdial populations during biological soil disinfestation and characteristics of clostridial isolates from the treated soil(The Annual Meeting of the Society in 2012)
• Development of anaerobic bacterial community consisted of diverse clostridial species during biological soil disinfestation amended with plant biomass(Soil biology)

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