Isolation and Characterization of Heterotrophic Chemoorganotrophic Bacteria from the Roots of Lepironia articulata (reedgrass) Grown on Strongly Acidic Sulfate Soil in South Thailand

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概要

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• Bacterial communities inhabiting the rhizosphere of Lepironia articulata (reedgrass) grown in a strongly acidic sulfate soil distributed in the province of Narathiwat, Thailand were investigated. Fresh roots of L. articulata were cut from the subterranean stem, and the bacteria were isolated from the homogenate on dilution plates of glucose-yeast extract agar medium adjusted to pH 4.5. In or on the roots, 3.3 × 10^7 bacteria(cfu) g^<-1> fresh roots were present. From the dilution plates, 60 bacteria were randomly isolated and their characteristics were examined. A11 the isolates were Gram-negative rods and grew well at pH 4.5. Analysis of cell fatty acids and the restriction fragment length polymorphism (RFLP) of PCR-amplified 16S rRNA genes indicated that the isolates could be divided into 4 groups (Group I to IV). Group I (65% of total) isolates failed to grow on the agar plate at pH 7. The sequence analysis of 16S rRNA genes of a Group I isolate showed that it resembled Acidocella facilis with 98.5% homology. Growth of Group I bacteria was suppressed by acetate. The next most abundant bacteria, belonging to Group II, grew at pH 7.0 and belonged to Burkholderia. These bacteria accounted for 28% of all the isolates. Bacteria of Group III and IV (identified as Bacillus subtilis) were a minor constituent only. Group III isolates were similar to the genus Xanthomonas, but the similarity of the 16S rRNA gene base arrangement with the nearest species was below 90%.

• 日本微生物生態学会の論文
• 1999-06-30

著者

• NIOH ICHIO

  Nodai Research Institute, Tokyo University of Agriculture

• Hayatsu Masahito

  Department Of Environmental Science For Human Life Faculty Of Agriculture Shizuoka University

• Hayatsu Masahito

  Department Of Human Environmental Science Faculty Of Agriculture Shizuoka University

• Limtong Pitayakon

  Land Development Department, Thailand

• OISHI RYUYA

  Department of Human Environmental Science, Faculty of Agriculture, Shizuoka University

• NIHO ICHIO

  NODAI Research Institute, Tokyo University of Agriculture

• NIHO TAKAO

  Ichimura Junior College

• LIMTONG PITAYAKON

  Division of Soil and Water Conservation, Department of Land Development

• Limtong Pitayakon

  Land Development Department Thailand

• Niho Ichio

  Nodai Research Institute Tokyo University Of Agriculture

• Oishi Ryuya

  Department Of Human Environmental Science Faculty Of Agriculture Shizuoka University

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