Occurrence of Hydrogen-Oxidizing Ralstonia Species as Primary Microorganisms in the Mt. Pinatubo Volcanic Mudflow Deposits(Soil Biology)

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概要

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• Ralstonia eutropha is an aerobic, hydrogen-oxidizing, facultative chemolithotrophic bacterium. Recently, R. eutropha-related bacteria have been found to predominate in the cultural bacterial communities of fresh mudflow deposits from Mt. Pinatubo, the Philippines. In the present study, the R. eutropha-related strains were examined for their chemolithotrophic growth in the presence of H_2, O_2, and CO_2 (85 : 5 : 10) and for their phylogenetic relationship with R. eutropha. Eleven of the 12 strains tested grew in the presence of H_2, O_2, and CO_2, although the growth was not as rapid as that of the well-characterized H_2-oxidizing strain, R. eutropha H16. To examine the hydrogenase activity, membrane and soluble fractions were prepared from R. eutropha-related strain 1245 and its activity was assayed with methylene blue and NAD as electron acceptors. A significant hydrogenase activity was detected in both membrane and soluble fractions of the cell-free extract. The 16S rDNA analysis of the 12 strains of R. eutropha-related bacteria revealed that they could be classified into two clusters, both of which were clearly separated from the cluster of R. eutropha sensu stricto. The probable ecological niche of H_2-oxidizing Ralstonia species in the volcanic mudflow deposits was examined.

著者

• Sato Yoshinori

  Department of Environmental Infectious Diseases, Graduate School of Medical Sciences, Kitasato Unive

• Ohta Hiroyuki

  School Of Agriculture Ibaraki University

• Yoshida Mika

  Faculty Of Agriculture Hokkaido University

• Yoshida M

  Department Of Public Health Kyorin University School Of Medicine

• Otsuka H

  Laboratory Of Soil Science Faculty Of Agriculture Kobe University

• Ohta H

  Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of

• Ohta Hiroyuki

  Dept. Biol. Sci. Tokyo Inst. Technol.

• Ohta H

  Okayama Univ. Dental School Okayama Jpn

• Ohta H

  Ibaraki University College Of Agriculture

• Rondal J.d.

  Bureau Of Soil And Water Management Department Of Agriculture

• Rondal J.

  Bureau Of Soil And Water Management Department Of Agriculture Quezon City

• OHTA HIROYUKI

  Department of Bioresource Science, College of Agriculture, Ibaraki University

• Yoshida Masao

  Department Of Transportation Engineering Faculty Of Science And Technology Meijo University

• NISHIHARA HIROFUMI

  Department of Agricultural Chemistry, The University of Tokyo

• Nishihara Hirofumi

  Department Of Bioresource Science Ibaraki University College Of Agriculture

• Yoshida Masao

  College Of Agriculture Ibaraki University

• Yoshida Masao

  Department Of Public Health Kyorin University School Of Medicine

• Watanabe M

  Department Of Energy Sciences Tokyo Institute Of Technology

• Watanabe M

  Faculty Of Horticulture Chiba University

• Ohta Hiroyuki

  Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of

• Ohta H

  Ibaraki Univ. Coll. Agriculture Ibaraki Jpn

• Watanabe Makiko

  Department of Environmental Science and Technology, Interdisciplinary Graduate School of Science and

• Rondal Jose

  Soils Research and Development Centre, Bureau of Soils and Water Management

• Rondal J

  Bureau Of Soils And Water Management In The Philippines Quezon City Phl

• Rondal Jose

  Soils Research And Development Centre Bureau Of Soils And Water Management

• Watanabe Makiko

  Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology

• Yoshida Masao

  Department Of Chemistry Faculty Of Science Science University Of Tokyo

• Sato Yoshinori

  Department Of Bioresource Science Ibaraki University College Of Agriculture

• Watanabe Mikiko

  Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• YOSHIDA Masao

  Department of Public Health, Kyorin University School of Medicine

• Yoshida Masao

  Department of Bioresource Science, Ibaraki University College of Agriculture

• SATO Yoshinori

  Department of Bioclimatology and Medicine. Research Institute of Bioregulation. Kyushu University

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