Updated on 2021/03/29

写真a

 
MURASE, Jun
 
Organization
Graduate School of Bioagricultural Sciences Field Science Center Division Professor
Graduate School
Graduate School of Bioagricultural Sciences
Undergraduate School
School of Agricultural Sciences Department of Bioresource Sciences
Title
Professor
Contact information
メールアドレス

Degree 1

  1. 博士(農学) ( 1994.10   名古屋大学 ) 

Research Interests 4

  1. wetland

  2. protists

  3. microbial food web

  4. methane

Research Areas 3

  1. Others / Others  / Biogeochemistry

  2. Others / Others  / Plant Nutrient Science/Soil Studies

  3. Others / Others  / Microbial Ecology

Current Research Project and SDGs 4

  1. 水田生態系における微生物群集の生態

  2. Diversity and function of protists in wetland soils

  3. 環北極陸域生態系のメタン動態

  4. 土壌生態系機能の解明を目指した人工土壌の開発

Research History 10

  1. Mie University

    2020.4

  2. Nagoya University

    2015.4

  3. 中部大学応用生物学部 非常勤講師

    2008.4 - 2012.3

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    Country:Japan

  4. 名古屋大学大学院生命農学研究科 講師

    2007.4

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    Country:Japan

  5. 名古屋女子大学家政学部 非常勤講師

    2005

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    Country:Japan

  6. 名城大学農学部非常勤講師

    2003

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    Country:Japan

  7. 名古屋女子大学家政学部 非常勤講師

    2003

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    Country:Japan

  8. 名古屋大学大学院生命農学研究科 助手

    2001.4 - 2007.3

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    Country:Japan

  9. School of Environmental Science, University of Shiga Prefecture (Assist. Prof.)

    1996.4 - 2001.3

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    Country:Japan

  10. 名古屋大学農学研究科 日本学術振興会特別研究員

    1992.4 - 1994.3

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    Country:Japan

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Education 2

  1. Nagoya University   Graduate School, Division of Agriculture

    1989.4 - 1994.10

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    Country: Japan

  2. Nagoya University   Faculty of Agriculture

    1985.4 - 1989.3

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    Country: Japan

Professional Memberships 5

  1. 日本土壌肥料学会

  2. 日本微生物生態学会   評議員

    2012.1

  3. 日本土壌微生物学会

  4. 日本陸水学会

  5. International Society of Microbial Ecology

Committee Memberships 1

  1. FAO Intergovernmental Technical Panel on Soils   Expert  

    2018.6   

Awards 4

  1. Best poster award

    2013.10   Taiwan Society of Microbial Ecology  

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    Award type:Award from international society, conference, symposium, etc.  Country:Taiwan, Province of China

  2. 日本土壌肥料学会優秀ポスター賞

    2010.9   日本土壌肥料学会  

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    Country:Japan

  3. 日本土壌微生物学会優秀ポスター賞

    2009.6   日本土壌微生物学会  

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    Country:Japan

  4. 日本陸水学会 吉村賞

    2001.10   日本陸水学会  

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    Country:Japan

 

Papers 91

  1. Soil texture and properties rather than irrigation water type shape the diversity and composition of soil microbial communities

    Obayomi Olabiyi, Seyoum Mitiku Mihiret, Ghazaryan Lusine, Tebbe Christoph C., Murase Jun, Bernstein Nirit, Gillor Osnat

    APPLIED SOIL ECOLOGY   Vol. 161   2021.5

  2. Effect of protists on rhizobacterial community composition and rice plant growth in a biochar amended soil

    Asiloglu Rasit, Sevilir Bahar, Samuel Solomon Oloruntoba, Aycan Murat, Akca Muhittin Onur, Suzuki Kazuki, Murase Jun, Turgay Oguz Can, Harada Naoki

    BIOLOGY AND FERTILITY OF SOILS   Vol. 57 ( 2 ) page: 293 - 304   2021.2

  3. Biochar affects taxonomic and functional community composition of protists

    Asiloglu Rasit, Samuel Solomon Oloruntoba, Sevilir Bahar, Akca Muhittin Onur, Bozkurt Pinar Acar, Suzuki Kazuki, Murase Jun, Turgay Oguz Can, Harada Naoki

    BIOLOGY AND FERTILITY OF SOILS   Vol. 57 ( 1 ) page: 15 - 29   2021.1

  4. Soil: the great connector of our lives now and beyond COVID-19

    Poch Rosa M., dos Anjos Lucia H. C., Attia Rafla, Balks Megan, Benavides-Mendoza Adalberto, Bolanos-Benavides Martha M., Calzolari Costanza, Chabala Lydia M., de Ruiter Peter C., Francke-Campana Samuel, Prechac Fernando Garcia, Graber Ellen R., Halavatau Siosiva, Hassan Kutaiba M., Hien Edmond, Jin Ke, Khan Mohammad, Konyushkova Maria, Lobb David A., Moshia Matshwene E., Murase Jun, Nziguheba Generose, Patra Ashok K., Pierzynski Gary, Eugenio Natalia Rodriguez, Rojas Ronald Vargas

    SOIL   Vol. 6 ( 2 ) page: 541 - 547   2020.11

  5. Susceptibility and resilience of the soil ciliate community to high temperatures

    Oshima Takaaki, Shinohara Yoko, Asakawa Susumu, Murase Jun

    SOIL SCIENCE AND PLANT NUTRITION   Vol. 66 ( 6 ) page: 870 - 877   2020.11

  6. Involvement of microaerophilic iron-oxidizing bacteria in the iron-oxidizing process at the surface layer of flooded paddy field soil

    Nakagawa Koki, Murase Jun, Asakawa Susumu, Watanabe Takeshi

    JOURNAL OF SOILS AND SEDIMENTS   Vol. 20 ( 11 ) page: 4034 - 4041   2020.11

  7. Protist-enhanced survival of a plant growth promoting rhizobacteria, Azospirillum sp. B510, and the growth of rice ( Oryza sativa L.) plants

    Asiloglu Rasit, Shiroishi Keiko, Suzuki Kazuki, Turgay Oguz Can, Murase Jun, Harada Naoki

    APPLIED SOIL ECOLOGY   Vol. 154   2020.10

  8. Methane oxidation potential of the arctic wetland soils of a taiga-tundra ecotone in northeastern Siberia

    Murase Jun, Sugimoto Atsuko, Shingubara Ryo, Liang Maochang, Morozumi Tomoki, Takano Shinya, Maximov Trofim C.

    SOIL SCIENCE AND PLANT NUTRITION   Vol. 66 ( 4 ) page: 645 - 652   2020.7

  9. Invention of Artificial Rice Field Soil: A Tool to Study the Effect of Soil Components on the Activity and Community of Microorganisms Involved in Anaerobic Organic Matter Decomposition

    Maeda Yu, Mise Kazumori, Iwasaki Wataru, Watanabe Akira, Asakawa Susumu, Asiloglu Rasit, Murase Jun

    MICROBES AND ENVIRONMENTS   Vol. 35 ( 4 )   2020

  10. Usability of water surface reflectance for the determination of riverine dissolved methane during extreme flooding in northeastern Siberia

    Morozumi Tomoki, Shingubara Ryo, Murase Jun, Nagai Shin, Kobayashi Hideki, Takano Shinya, Tei Shunsuke, Fan Rong, Maximov Trofim C., Sugimoto Atsuko

    POLAR SCIENCE   Vol. 21   page: 186 - 194   2019.9

  11. Multi-year effect of wetting on CH4 flux at taiga-tundra boundary in northeastern Siberia deduced from stable isotope ratios of CH4

    Shingubara Ryo, Sugimoto Atsuko, Murase Jun, Iwahana Go, Tei Shunsuke, Liang Maochang, Takano Shinya, Morozumi Tomoki, Maximov Trofim C.

    BIOGEOSCIENCES   Vol. 16 ( 3 ) page: 755-768   2019.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/bg-16-755-2019

    Web of Science

  12. Microhabitat segregation of heterotrophic protists in the rice (Oryza sativa L.) rhizosphere

    Asiloglu Rasit, Murase Jun

    RHIZOSPHERE   Vol. 4   page: 82 - 88   2017.12

  13. Quest of Soil Protists in a New Era

    Murase Jun

    MICROBES AND ENVIRONMENTS   Vol. 32 ( 2 ) page: 99 - 102   2017.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1264/jsme2.ME3202rh

    Web of Science

    PubMed

  14. Response of the protistan community of a rice field soil to different oxygen tensions (vol 92, fiw104, 2016)

    Takenouchi Yuriko, Iwasaki Kazufumi, Murase Jun

    FEMS MICROBIOLOGY ECOLOGY   Vol. 93 ( 5 )   2017.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/femsec/fix026

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    PubMed

  15. Fluctuations in the abundance of ammonia oxidizers and the contents of inorganic nitrogen in solarized soil

    Yamagata Mina, Shinohara Yoko, Maesaka Masahiro, Murase Jun, Asakawa Susumu

    SOIL SCIENCE AND PLANT NUTRITION   Vol. 63 ( 5 ) page: 434-440   2017

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    DOI: 10.1080/00380768.2017.1368035

    Web of Science

  16. Response of the protistan community of a rice field soil to different oxygen tensions Reviewed

    Takenouchi, Y., Iwasaki, K., Murase, J.

    FEMS Microbiology Ecology     2016

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    DOI: doi: 10.1093/femsec/fiw104

  17. Active community structure of microeukaryotes in a rice (Oryza sativa L.) rhizosphere revealed by RNA-based PCR-DGGE Reviewed

    Asiloglu, R., Murase, J.

    Soil Science and Plant Nutrition   Vol. 62   page: 440-446   2016

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  18. Impact of long-term fertilizer treatment on the microeukaryotic community structure of a rice field soil. Reviewed

    Murase, J., Hida, A., Ogawa, K., Nonoyama, T., Yoshikawa, N., Imai, K.

    Soil Biology and Biochemistry   Vol. 80   page: 237-243   2015

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  19. Impact of soil solarization on the ciliate community structure of a greenhouse soil. Reviewed

    Murase, J., Shinohara, Y., Yokoe, K., Matsuda, R., Asakawa, S., Hashimoto, T.

      Vol. 60 ( 4 ) page: 927-933   2015

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  20. Community structure of microeukaryotes in a rice rhizosphere revealed by DNA-based PCR-DGGE. Reviewed

    Asiloglu, R., Honjo, H., Saka, N., Asakawa, S., Murase, J.

    Soil Sci Plant Nutr   Vol. 61   page: 761-768   2015

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  21. Impact of soil solarization on the ciliate community structure of a greenhouse soil. 61, 927-933 (2015) Reviewed

    Yokoe, K., Maesaka, M., Murase, J., Asakawa, S

    Soil Sci. Plant Nutr.   Vol. 61   page: 641-652   2015

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  22. Abundance and composition of ammonia oxidizers in response to degradation of root cap cells of rice in soil microcosms. Reviewed

    Li, Y., Watanabe, T., Murase, J., Asakawa, S., Kimura, M.

    Journal of soils and sediments   Vol. 14   page: 1587-1598   2014

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  23. Branched and isoprenoid glycerol dialkyl glycerol tetraethers in soils and lake/river sediments in Lake Biwa basin and implications for MBT/CBT proxies. Reviewed

    Ajioka, T., Yamamoto, M., Murase, J.

    Organic Geochemistry   Vol. 73   page: 70-82   2014

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  24. Low nitrogen fertilization adapts rice root microbiome to low nutrient environment by changing biogeochemical functions. Reviewed

    Ikeda, S., Sasaki, K., Okubo, T., Yamashita, A., Terasawa, K., Bao, Z., Liu, D., Watanabe, T., Murase, J., Asakawa, S., Eda, S., Mitsui, H., Sato, T., Minamisawa, K.

    Microbes and Environments   Vol. 29   page: 50-59   2014

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  25. Growth of hydrogenotrophic and acetoclastic methanogens on substrate from rice plant callus cells in anaerobic soil: an estimation to the role of slough-off root cap cells to their growth Reviewed

    Li Y, Watanabe T, Murase J, Asakawa S, Kimura M

      Vol. 59   page: 548-558   2013

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  26. Identification of the major capsid gene (g23) of T4-type bacteriophages that assimilate substrates from root cap cells under aerobic and anaerobic soil conditions using a DNA-SIP approach Reviewed

    Li Y, Watanabe T, Murase J, Asakawa S, Kimura M

      Vol. 63   page: 97-105   2013

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  27. 安定同位体プロービング(SIP)法で探る水田土壌の物質動態と微生物 Invited Reviewed

    村瀬 潤

     土と微生物 67, 39-46 (2013)   Vol. 67   page: 39-46   2013

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    Authorship:Lead author   Language:Japanese  

  28. Growth of hydrogenotrophic and acetoclastic methanogens on substrate from rice plant callus cells in anaerobic soil: an estimation to the role of slough-off root cap cells to their growth. Reviewed

    Li, Y., Watanabe, T., Murase, J., Asakawa, S., Kimura, M.

    Soil Sci. Plant Nutr.   Vol. 59   page: 548-558   2013

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  29. Growth of methanogens in an oxic soil microcosm: Elucidation by a DNA-SIP experiment using 13C-labeled dried rice callus. Reviewed

    Li, Y, Lee CG, Watanabe T, Murase J, Asakawa S, Kimura M

      Vol. 58   page: 37-44   2012

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  30. Phylogenetic diversity of microturbellarians in Japanese rice paddy fields, with special attention to the genus Stenostomum. Reviewed

    Yamazaki, M, Murase, J, Asakawa, S, Kimura, M

    Soil Science and Plant Nutrition   Vol. 58   page: 11-23   2012

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  31. Incorporation of plant residue-derived carbon into the microeukaryotic community in a rice field soil revealed by DNA stable-isotope probing. Reviewed

    Murase J, Shibata M, Lee CG, Watanabe T, Asakawa S, Kimura M

      Vol. 79   page: 371-379   2012

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  32. 北方湿地生態系からのメタン放出に及ぼす積雪の影響 Invited Reviewed

    村瀬 潤

    低温科学   Vol. 70   page: 131-136   2012

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  33. Assimilation of glucose-derived carbon into methanogenic archaea in soil under unflooded condition. Reviewed

    Watanabe T, Wang G, Taki K, Lee CG, Murase J, Asakawa S, Kimura M

    Applied Soil Ecology   Vol. 48   page: 201-209   2011

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  34. A new thermophilic heterolobosean amoeba, Fumarolamoeba ceborucoi, gen. nov., sp. nov., isolated near a fumarole at a volcano in Mexico. Reviewed

    Johan F. De Jonckheere JF, Murase J, Opperdoes FR

      Vol. 50   page: 43-50   2011

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  35. Bacterial populations assimilating carbon from 13C-labeled plant residue in soil: analysis by a DNA-SIP approach. Reviewed

    Lee CG, Watanabe T, Sato Y, Murase J, Asakawa S, Kimura M

      Vol. 43   page: 814-822   2011

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  36. Strain-specific incorporation of methanotrophic biomass into eukaryotic grazers in a rice field soil revealed by PLFA-SIP. Reviewed

    FEMS Microbiology Ecology   Vol. 75   page: 284-290   2011

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  37. Identification of microbial communities that assimilate substrate from root cap cells in an aerobic soil using a DNA-SIP approach. Reviewed

    Li, Y, Lee CG, Watanabe T, Murase J, Asakawa S, Kimura M

    Soil Biology & Biochemistry   Vol. 43   page: 1928-1935   2011

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  38. Unique viral capsid assembly protein gene (g20) of cyanophages in the floodwater of a Japanese paddy field. Reviewed

    Wang GH, Murase J, Asakawa S, Kimura M

    Biol. Fert. Soils   Vol. 46   page: 93-102   2010

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  39. Isolation of a new heterolobosean amoeba from a rice field soil: Vrihiamoeba italica gen. nov., sp. nov. Reviewed

    Murase J, Kawasaki M, De Jonckheere JF

    Eur. J. Protistol.   Vol. 46   page: 164-170   2010

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  40. Isolation of a new heterolobosean amoeba from a rice field soil: Vrihiamoeba italica gen. nov., sp. nov. Reviewed

    Murase J, Kawasaki M, De Jonckheere JF

    European Jouranal of Protistology   Vol. 46   page: 164-170   2010

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  41. Low diversity of T4-type bacteriophages in applied rice straw, plant residues and rice roots in Japanese rice soils: Estimation from major capsid gene (g23) composition. Reviewed

    Fujihara S, Murase J, Tun CC, Matsuyama T, Ikenaga M, Asakawa S, Kimura M

    Soil Science and Plant Nutrition   Vol. 56   page: 800-812   2010

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  42. Novel cyanophage photosynthetic gene psbA in the floodwater of a Japanese rice field. Reviewed

    Wang GH, Murase J, Asakawa S, Kimura M

    FEMS Microbiol. Ecol.   Vol. 70   page: 79-86   2009

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  43. Methanogenic archaeal communities developed in paddy fields in the Kojima Bay polder, estimated by denaturing gradient gel electrophoresis, real-time PCR and sequencing analyses. Reviewed

    Watanabe, T., Cahyani, V.R., Murase, J., Ishibashi, E., Kimura, M., Asakawa, S.

    Soil Sci. Plant Nutr.   Vol. 55   page: 73-79   2009

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  44. Phyologenetic positions of Mn-oxidizing bacteria and fungi inhabiting Mn nodules in rice field subsoils. Reviewed

    Cahyani, V.R., Murase, J., Ikeda, A., Taki, K., Asakawa, S., Kimura,M

    Biol. Fertil. Soils   Vol. 45   page: 337-346   2009

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  45. T4-type bacteriophage communities estimated from the major capsid genes (g23) in manganese nodules in Japanese paddy fields. Reviewed

    Cahyani VR, Murase J, Ishibashi E, Asakawa S, Kimura M

    Soil Sci. Plant Nutr.   Vol. 55   page: 468-477   2009

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  46. Changes in major capsid genes (g23) of T4-type bacteriophages with soil depth in two Japanese rice fields. Reviewed

    Wang GH, Murase J, Taki K, Ohashi Y, Yoshikawa N, Asakawa S, Kimura M

    Biol. Fert. Soils   Vol. 45   page: 521-529   2009

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  47. Eukaryotic communities associated with the decomposition of rice straw compost in a Japanese rice paddy field estimated by DGGE analysis Reviewed

    HatamotoM., Tanahashi T., Murase J., Matsuya M., Hayashi M., Kimura M., Asakawa S.

    Bio. Fert. Soils   Vol. 44 ( 3 ) page: 527-532   2008

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    To estimate the succession and phylogenetic composition of the eukaryotic communities responsible for the decomposition of rice straw compost under flooded conditions during the cultivation period of paddy rice, denaturing gradient gel electrophoresis (DGGE) analysis targeting 18S rDNA followed by sequencing was conducted in a Japanese paddy field. The eukaryotic communities in rice straw compost incorporated into the flooded paddy field were influenced by the mid-season drainage and mainly composed of fungi (Ascomycota, Zygomycota, and Chytridiomycota) and protozoa (Ciliophora, Euglyphida, and Dactylopodida), most of which existed continuously during the cultivation period of paddy rice. The results indicated that these eukaryotic members were associated with the decomposition of rice straw compost in paddy field soil directly or indirectly

  48. *Selective grazing of methanotrophs by protozoa in a rice field soil. Reviewed

    Murase,J. Frenzel,P.

    FEMS Microbiol. Ecol.   Vol. 65   page: 408-414   2008

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  49. Phyologenetic positions of Mn-oxidizing bacteria and fungi inhabiting Mn nodules in rice field subsoils. Reviewed

    Vita Ratri Cahyani, Jun Murase, Akihiro Ikeda, Katsutoshi Taki, Susumu Asakawa, and Makoto Kimura

    Bio. Fert. Soils     page: 10.1007/s00374-008-0337-8.   2008

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  50. Bacterial communities in Fe mottles in the plow pan layer of a Japanese rice field: estimation using PCR-DGGE and sequencing analyses Reviewed

    Vita Ratri Cahyani, Jun Murase, Eiji Ishibasi, Susumu Asakawa, and Makoto Kimura

    Soil Sci. Plant Nutr.   Vol. 54 ( 4 ) page: doi: 10.1111/j.1747-0765.2008.00291.x   2008

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  51. *A methane-driven microbial food web in a wetland rice soil. Reviewed

    Murase, J., Frenzel,P.

    Environ. Microbiol.   Vol. 9 ( 12 ) page: 3025-3034   2007.12

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    Methane oxidation is a key process controlling methane emission from anoxic habitats into the atmosphere. Methanotrophs, responsible for aerobic methane oxidation, do not only oxidize but also assimilate methane. Once assimilated, methane carbon may be utilized by other organisms. Here we report on a microbial food web in a rice field soil driven by methane. A thin layer of water-saturated rice field soil was incubated under opposing gradients of oxygen and 13C-labelled methane. Bacterial and eukaryotic communities incorporating methane carbon were analysed by RNA-stable isotope probing (SIP). Terminal restriction fragment length polymorphism (T-RFLP) and cloning showed that methanotrophs were the most prominent group of bacteria incorporating methane carbon. In addition, a few Myxobacteria-related sequences were obtained from the heavy rRNA fraction. Denaturing gradient gel electrophoresis (DGGE) targeting 18S rRNA detected various groups of protists in the heavy rRNA fraction including naked amoeba (Lobosea and Heterolobosea), ciliates (Colpodea) and flagellates (Cercozoa). Incubation of soil under different methane concentrations in air resulted in the development of distinct protozoan communities. These results suggest that methane carbon is incorporated into non-methanotrophic pro- and microeukaryotes probably via grazing, and that methane oxidation is a shaping force of the microeukaryotic community depending on methane availability

  52. *水田土壌の細菌群集の構造と機能に及ぼす原生動物の影響 Invited

    村瀬 潤

    土と微生物   Vol. 61   page: 65-68   2007

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  53. Bacterial communities in manganese nodules in rice field subsoils: estimation by PCR-DGGE and sequencing analyses. Reviewed

    Cahyani, V.R., Murase,J., Ishibashi,E., Asakawa,S., Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 53   page: 578-584   2007

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    The phylogenetic positions of bacterial communities in manganese (Mn) nodules from subsoils of two Japanese rice fields were estimated using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis followed by sequencing of 16S rDNA. The DGGE band patterns and sequencing analysis of characteristic DGGE bands revealed that the bacterial communities in Mn nodules were markedly different from those in the plow layer and subsoils. Three out of four common bands found in Mn nodules from two sites corresponded to Deltaproteobacteria and were characterized as sulfate-reducing and iron-reducing bacteria. The other DGGE bands of Mn nodules corresponded to sulfate and iron reducers (Deltaproteobacteria), methane-oxidizing bacteria (Gamma and Alphaproteobacteria), nitrite-oxidizing bacteria (Nitrospirae) and Actinobacteria. In addition, some DGGE bands of Mn nodules showed no clear affiliation to any known bacteria. The present study indicates that members involved in the reduction of Mn nodules dominate the bacterial communities in Mn nodules in rice field subsoils

  54. Impact of protists on the activity and structure of the bacterialcommunity in a rice field soil Reviewed

    Murase, J., Noll, M., Frenzel,P.

    Applied and Environmental Microbiology   Vol. 72 ( 8 ) page: 5436-5444   2006.8

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    Flooded rice fields have become a model system for the study of soil microbial ecology. In Italian rice fields,
    in particular, aspects from biogeochemistry to molecular ecology have been studied, but the impact of protistan
    grazing on the structure and function of the prokaryotic community has not been examined yet. We compared
    an untreated control soil with a -radiation-sterilized soil that had been reinoculated with a natural bacterial
    assemblage. In order to verify that the observed effects were due to protistan grazing and did not result from
    sterilization, we set up a third set of microcosms containing sterilized soil that had been reinoculated with
    natural assemblage bacteria plus protists. The spatial and temporal changes in the protistan and prokaryotic
    communities were examined by denaturing gradient gel electrophoresis (DGGE) and terminal restriction
    fragment length polymorphism (T-RFLP) analysis, respectively, both based on the small-subunit gene. Sequences
    retrieved from DGGE bands were preferentially affiliated with Cercozoa and other bacteriovorous
    flagellates. Without protists, the level of total DNA increased with incubation time, indicating that the level of
    the microbial biomass was elevated. Betaproteobacteria were preferentially preyed upon, while low-GC-content
    gram-positive bacteria became more dominant under grazing pressure. The bacterial diversity detectable by
    T-RFLP analysis was greater in the presence of protists. The level of extractable NH4
    was lower and the level
    of extractable SO4
    2 was higher without protists, indicating that nitrogen mineralization and SO4
    2 reduction
    were stimulated by protists. Most of these effects were more obvious in the partially oxic surface layer (0 to 3
    mm), but they could also be detected in the anoxic subsurface layer (10 to 13 mm). Our observations fit well
    into the overall framework developed for protistan grazing, but with some modifications pertinent to the
    wetland situation

  55. 土壌中の遺伝子・遺伝情報 何ができるのか、何が分かるのか9.土壌DNAの利用、新しい研究手法(その2)Stable Isotope Probing Invited Reviewed

    村瀬 潤

    日本土壌肥料学雑誌   Vol. 77 ( 2 ) page: 231-234   2006

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  56. *Incorporation of 13C-labeled rice straw carbon into microbial communities in submerged rice field soil and the percolating water. Reviewed

      Vol. 38   page: 3483-3491   2006

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  57. Vertical Changes in Bacterial communities in percolating water of a Japanese paddy field as revealed by PCR-DGGE. Reviewed

    Murase,J., Shimizu,M., Hayashi,M., Matsuya,K., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 51   page: 821-829   2005

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  58. Inhibitory effect of light on methane oxidation in the pelagic water column of a mesotrophic lake (Lake Biwa, Japan). Reviewed

    Murase,J. and Sugimoto,A.

    Limnol. Oceanogr.   Vol. 50   page: 1339-1343   2005

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    Methane oxidation was studied in mesotrophic lake water (Lake Biwa, Japan) under thermally stratified conditions. Methane oxidation rates at in situ concentrations were very low in lake water from the epilimnion and thermocline but were high in hypolimnetic water. Incubation under light conditions ranging from 4.1 to 57 mu mol photons m(-2) s(-1) resulted in decreased methane oxidation in hypolimnetic water. This inhibition was more severe as the light intensity increased. Addition of inorganic nitrogen (ammonium and nitrate) did not promote methane oxidation in the thermocline but inhibited it in the hypolimnion. Methane oxidation activity in the thermocline was observed after I month of incubation under dark conditions. Our results suggest that the inhibitory effect of light was bacteriostatic for the methanotrophic population. The different rates of methane oxidation between the hypolimnion and epilimnion/thermocline may explain the surface maximum of dissolved methane during the period of thermal stratification

  59. Carbon cycling in rice field ecosystems in the context of input, decomposition and translocation of organic materials and the fates of their end products (CO2 and CH4). Reviewed

    Kimura,M., Murase,J., and Lu,Y.

    Soil Biol. Biochem.   Vol. 36   page: 1399-1416   2005

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  60. Effect of rice straw amendment on dissolved organic and inorganic carbon, and cationic nutrients in percolating water from a flooded paddy soil: A microcosm experiment using 13C-enriched rice straw. Invited Reviewed

    Katoh,M., Murase,J., Sugimoto,A., and Kimura,M.

    Org. Geochem.   Vol. 36   page: 803-811   2005

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  61. Bacterial community responsible for the decomposition of rice straw compost in a Japanese rice paddy field estimated by DGGE analysis of amplified 16S rDNA and 16S rRNA fragments. Reviewed

    Tanahashi,T., Murase,J., Matsuya,K., Asakawa, S., and Kimura,M.

    Soil Sci. Plant Nutr., 51, 351-360 (2005)   Vol. 51   page: 351-360   2005

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  62. Dynamics of methane in a mesotrophic Lake Biwa, Japan. Invited Reviewed

    Murase.J., Sakai,Y., Kametani,A., and Sugimoto,A.

    Ecol. Res.   Vol. 20   page: 377-385   2005

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  63. Analysis of communities of ammonia oxidizers, methanotrophs, and methanogens associated with microcrustaceans in the floodwater of a rice field microcosm. Reviewed

    Niswati,A., Murase,J., Asakawa,S., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 50   page: 447-455   2004

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  64. Microbial communities responsible for the decomposition of rice straw compost in a Japanese rice paddy field determined by phospholipid fatty acid (PLFA) analysis. Reviewed

    Tanahashi,T., Murase,J., Matsuya,K., Asakawa,S., and Kimura,M.

    Soil Sci. Plant Nutr., 50, 1229-1236 (2004)   Vol. 50   page: 1229-1236   2004

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  65. Sites and process of nutrient accumulation in the subsoil through water percolation from the plow layer in a submerged paddy soil microcosm. Reviewed

    Katoh,M., Murase,J., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 50   page: 731-738   2004

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  66. Nutrient leaching from the plow layer by water percolation and accumulation in the subsoil in an irrigated paddy field. Reviewed

    Katoh,M., Murase,J., Hayashi,M., Matsuya,K., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 50   page: 721-729   2004

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  67. Biotic and abiotic methane releases from Lake Biwa sediment slurry. Reviewed

    Dan,J., Kumai,T., Sugimoto,A., and Murase,J.

    Limnology   Vol. 5   page: 149-154   2004

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  68. Linking microbial community dynamics to rhizosphere carbon flow in a wetland rice soil. Reviewed

    Lu,Y., Murase,J., Watanabe,A., Sugimoto,A., and Kimura,M.

    FEMS Microbiol. Ecol.   Vol. 48   page: 179-186   2004

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  69. Effect of application of rice straw and compost on the community structure of bacteria associated with microcrustaceans in the floodwater of a paddy field microcosm. Reviewed

    Niswati,A., Murase,J., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 49   page: 191-200   2003

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  70. Adsorption as a methane storage process in natural lake sediment. Reviewed

    Sugimoto,A., Dan,J., Kumai,T., and Murase,J.

    Geophys. Res. Lett.   Vol. 30   page: doi:10.1029/2003GL018162   2003

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  71. Molecular analysis of β-proteobacterial ammonia oxidizer populations in surface layers of a submerged paddy soil microcosm. Reviewed

    Murase,J., Itoh,K., Kano,M., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 49   page: 909-913   2003

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  72. Sources of dissolved methane in Lake Biwa. Reviewed

    Murase,J., Sakai,Y., Sugimoto,A., Okubo,K., and Sakamoto,M.

    Limnology   Vol. 4   page: 91-99   2003

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  73. 第2編第2章2.2自然特性

    村瀬潤

        2002.3

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    流域管理のための総合調査マニュアル

  74. Resuspension of bottom sediment by an internal wave in Lake Biwa Reviewed

    Sakai,Y., Murase,J., Sugimoto,A., Okubo,K., and Nakayama,E.

    Lakes Reserv.   Vol. 7   page: 339-344   2002

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  75. Seasonal and spatial variations of methane production in mesotrophic lake sediments (Lake Biwa, Japan).

    Murase,J. and Sugimoto,A.:

    Verh.Int. Ver. Limnol.   Vol. 28   page: 971-974   2002

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  76. Comparison of microbial communities in percolating water from plow layer and subsoil layer estimated by phospholipid fatty acid (PLFA) analysis. Reviewed

    Shimizu,M., Hayashi,M., Matsuya,K., Murase,J., and Kimura,M.

    Soil Sci. Plant Nutr.   Vol. 48   page: 877-881   2002

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  77. Uptake of carbon and nitrogen through roots of rice and corn plants, grown in soils treated with 13C and 15N dual-labeled cattle manure compost. Reviewed

    Yamamuro,S., Ueno,H., Yamada,H., Takahashi,Y., Shiga,Y., Miyahara,S., Shimonihara,T., Murase,J., Yanai,J., and Nishida,M.

    Soil Sci. Plant Nutr.   Vol. 48   page: 787-795   2002

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  78. 沿岸帯を観るキーワード -その多面的多様性- Invited Reviewed

    村瀬 潤・野崎健太郎・山田佳裕

    陸水学雑誌   Vol. 63   page: 269-270   2002

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  79. Spatial distribution of methane in the Lake Biwa sediments and its carbon isotopic compositions

    Jun MURASE & Atsuko SUGIMOTO

    Geochemical Journal   Vol. 35   page: 257-263   2001.8

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  80. Horizontal distribution of carbon and nitrogen and their isotopic compositions in the surface sediment of Lake Biwa

    "Murase,J. and Sakamoto,M"

    Limnology   Vol. 1   page: 177-184   2000.1

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  81. 琵琶湖堆積物の生元素の空間的分布

    村瀬潤

        1998.1

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    "エコフロンティア1, 52-55"

  82. "Anaerobic reoxidation of Mn2+, Fe2+, S0 and S2- in submerged paddy soils."

    "Murase,J. and Kimura,M.:"

    Biol.Fert.Soil.   Vol. 25   page: 302-306   1997.1

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  83. Anaerobic reoxidation of Mn2+, Fe2+, S0 and S2- in submerged poddy soils.

    Biology Fertility Soil   Vol. 25   page: 302-306   1997

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  84. Methane production and its fate in paddy fields. IX. Methane flux distribution and decomposition of methane in the subsoil during the growth period of rice plants.

    "Murase,J. and Kimura,M."

    Soil Sci. Plant Nutr.   Vol. 42(1)   page: 187-190   1996.1

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  85. Utilization of the feces sludge from the swine farm for rice production in the problem soils in Thailand.

    "Murase,J., Korpraditskul,R., Osotsapar,Y., and Korpraditskul,V"

    J. ISSAAS   Vol. 2   page: 54-71   1996.1

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  86. Methane production and its fate in paddy fields. (]G0009[) Methane flux distribution and decompostition of methane in the subsoil during the growth period of rice plants

    Soil Science and Plant Nutrition   Vol. 42 ( 1 ) page: 187-190   1996

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  87. Utilization of the faces sludge from the swine Farm for rice production in the problem soils in Thailand

    Journal of International Society for Southeast Asian Agricultural Sciences(J. ISSAAS)   Vol. 2   page: 54-71   1996

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  88. Methane production and its fate in paddy fields. IV. Sources of microorganisms and substrates responsible for anaerobic methane oxidation in subsoil. Reviewed

    Soil Science and Plant Nutrition   Vol. 40 ( 1 ) page: 57-61   1994

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  89. Methane production and its fate in paddy fields. (]G0006[) Anaerobic oxidation of methane in plow layer soil

    Soil Science and Plant Nutrition   Vol. 40 ( 3 ) page: 505-514   1994

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  90. Methane production and Its fate in paddy fields. (]G0007[) Electron Acceptors responsible for anaerobic methane oxidation

    Soil Science and Plant Nutrition   Vol. 40 ( 4 ) page: 647-654   1994

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  91. Methane production and its fate in paddy fields. (]G0003[). Effects of percolation on methane flux distribution to the atmosphere and the subsoil

    Soil Science and Plant Nutrition   Vol. 39 ( 1 ) page: 63-70   1993

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    Language:English  

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Books 15

  1. 水田微生物の特徴と生産性とのかかわり

    村瀬 潤( Role: Sole author)

    朝倉書店  2018.8  ( ISBN:978-4-254-43571-9

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    Language:Japanese Book type:Scholarly book

  2. 最新農業技術「土壌施肥 vol.9」

    村瀬 潤( Role: Sole author ,  太陽熱処理が土壌繊毛虫群集に及ぼす影響)

    農文協  2017.3 

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    Language:Japanese Book type:Scholarly book

  3. 土のひみつ-食料・環境・生命-

    日本土壌肥料学会「土のひみつ」編集グループ(編)( Role: Joint author)

    朝倉書店  2015.9 

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    Language:Japanese

  4. 4.1 微生物.身近な水の環境科学-実習・測定編-

    日本陸水学会東海支部会( Role: Joint author)

    朝倉書店  2014.6 

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    Language:Japanese

  5. 第16章 Stable Isotope Probing、土壌微生物実験法第3版

    日本土壌微生物学会 (編)( Role: Sole author)

    養賢堂  2013.6 

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    Language:Japanese

  6. 第10章 原生動物 (10-2~10-6節)、土壌微生物実験法第3版

    日本土壌微生物学会 (編)( Role: Sole author)

    養賢堂  2013.6 

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    Language:Japanese

  7. 12. 窒素サイクル,メタンサイクルに果たす微生物の役割、 シリーズ 現代の生態学11巻

    村瀬 潤( Role: Sole author)

    共立出版  2011.3 

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    Language:Japanese

  8. 7.水田の土壌環境と微生物相  身近な自然の保全生態学

    村瀬 潤, 浅川 晋( Role: Joint author)

    培風館  2010.10 

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  9. 世紀を超えて座談会を傍聴する、日本微生物生態学会編、土壌微生物通信(1962-1986)探訪(2) 「通信」の時代と現在の間

    村瀬 潤( Role: Sole author)

    博友社  2010.5 

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    Language:Japanese

  10. 7.集水域の中の水田、日本陸水学会東海支部会編、身近な水の環境科学-源流から干潟まで-

    村瀬 潤( Role: Sole author)

    朝倉書店  2010.1  ( ISBN:978-4-254-18023-7

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    村瀬 潤:7.集水域の中の水田、日本陸水学会東海支部会編、身近な水の環境科学-源流から干潟まで-、p.92-102、朝倉書店(2010)

  11. *土壌の原生生物・線虫群集-その土壌生態系での役割-

    橋本知義、村瀬 潤、島野智之、岡田浩明、豊田剛己、佐藤恵利華( Role: Joint author)

    博友社  2009.8 

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  12. Terrestrial ecosystems in a changing world.

    Kohyama,T., Urabe,J., Hikosaka,K., Shibata,H., Yoshioka,T., Konohira,E., Murase,J., Wada,E.( Role: Joint author)

    Springer  2007 

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    Terrestrial ecosystems in monsoon Asia: scaling up from shoot module to watershed.

  13. 地球環境と生態系 5.4 水系のガス代謝

    村瀬 潤・杉本敦子( Role: Joint author)

    共立出版  2006.5 

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  14. 東アジアモンスーン域の湖沼と流域 3-4湖の富栄養化の現状、変動経過、原因

    坂本 充・村瀬 潤・丸尾雅啓( Role: Joint author)

    名古屋大学出版会  2006 

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  15. 新・土の微生物 (5)系統分類からみた土の細菌

    村瀬潤( 編:日本土壌微生物学会編)( Role: Joint author)

    博友社  2000 

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    2-7δおよびγプロテオバクテリア

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Presentations 21

  1. PLFA-SIP法を用いた水田土壌の原生動物によるメタン酸化細菌の捕食解析

    村瀬 潤、Paul Bodelier

    日本土壌微生物学会 

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    Event date: 2010.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  2. 微生物食物連鎖の分子生物学的解析:メタン酸化を例として

    日本生態学会 

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    Event date: 2010.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  3. 水田土壌から分離された新奇Heteroloboseaアメーバの形態学的・分子系統学的解析

    村瀬 潤、Johan F. De Jonckheere

    日本陸水学会東海支部会 

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    Event date: 2010.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  4. 原生動物の捕食作用が水田土壌のメタン酸化細菌群集に及ぼす影響

    村瀬 潤、Peter Frenzel

    日本微生物生態学会 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  5. 有機物施用および酸素の有無が水田土壌の真核微生物群集に及ぼす影響

    岩崎和史・村瀬 潤・木村眞人

    日本土壌肥料学会 

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    Event date: 2009.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  6. Impact of protozoan grazing on the community of methanotrophic bacteria in a wetland rice field soil International conference

    the10th InternationalSymposium on Bacterial Genetics and Ecology 

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    Event date: 2009.6

    Language:English   Presentation type:Poster presentation  

  7. 水田土壌のメタン酸化細菌群集におよぼす原生動物の影響

    村瀬 潤・Peter Frenzel

    日本土壌微生物学会 

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    Event date: 2009.6

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  8. 水田土壌の原生動物によるメタン酸化細菌の選択的捕食

    村瀬 潤、Paul L.E. Bodelier

    日本陸水学会東海支部会 

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    Event date: 2009.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  9. 水田土壌生態系の機能における細菌-原生生物系の役割

    日本土壌肥料学会2008年度大会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  10. Selective grazing of free-living naked amoeba on methane-oxidizing bacteria. (Wako, Japan) 9 2007.8-27-30 International conference

    XIIth International Meeting on the Biology and Pathogenicity of Free-Living Amoebae 

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    Event date: 2007.8

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

    Biological methane oxidation at the oxic-anoxic interface in wetland soils and sediments is a key process in methane cycle, preventing large amounts of this greenhouse gas from escaping into the atmosphere. Methane oxidizing bacteria (MOB) is the only group of aerobic bacteria that oxidize methane and assimilate methane-C. However, the fate of MOB-biomass is largely unknown. Here we demonstrate that a microbial food web can be driven by methane. Soil microcosms, in which a thin layer of water-sa

  11. 水田土壌から単離したアメーバの系統解析

    村瀬 潤・Peter Frenzel

    日本土壌肥料学会2007年度大会 

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    Event date: 2007.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    原生動物は細菌群集の構造や機能に影響を及ぼす生物因子である。土壌原生動物の生残・活性は土壌の水分状態に支配されるので、湛水状態の水田土壌は原生動物にとって好適な環境であると予想される。水田土壌中の原生動物の研究は、これまで繊毛虫が主たる対象であり、細菌に対する影響が大きいといわれるアメーバ、鞭毛虫の多様性に関する知見は限られている。本研究では、水田土壌から単離したアメーバについて18SrRNA遺伝子配列に基づく系統解析を行った。

  12. メタン酸化細菌に対する原生動物の捕食選択性

    村瀬 潤・Peter Frenzel

    日本土壌微生物学会2007年度大会 

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    Event date: 2007.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    水田土壌の嫌気層で生成したメタンは,大気へと放出される過程で土壌表層や好気的な根圏で大部分酸化されると考えられている。これまでに,酸化還元層を再現したモデル実験により,メタン酸化細菌以外にも細菌捕食性の原生動物がメタン由来の炭素を同化することが明らかとなり,原生動物によるメタン酸化細菌バイオマスの捕食作用が示唆された。本研究では,異なるメタン酸化細菌に対する土壌原生動物の捕食性を比較した。
    メタンを基質として培養したメタン酸化細菌10株を餌細菌に含む無機塩培地を用いて,水田土壌中の原生動物数を最

  13. The Methanotrophic Microbial Food Chain in a Rice Field Soil International conference

    The 10th International Symposium on Wetland Biogeochemistry 

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    Event date: 2007.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    Biological methane oxidation at the oxic-anoxic interface in wetland soils and sediments is a key process in methane cycle, preventing large amounts of this greenhouse gas to escape into the atmosphere. A specific group of aerobic bacteria oxidises methane and is also able to assimilate methane-C. In limnic ecosystems, MOB (methane oxidising bacteria) are responsible for most of the methane oxidation, and they are also important in the surface layer of marine sediments. However, the fate of meth

  14. 水田土壌の物質循環と原生動物の機能

    村瀬 潤

    2006年度・日本微生物生態学会 学際シンポジュウム -土壌における原生生物の多様性と微生物との相互作用- 

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    Event date: 2006.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  15. 原生動物が水田土壌の物質循環に及ぼす影響

    村瀬 潤・Peter Frenzel・Matthias Noll

    日本土壌肥料学会2006年度秋田大会 

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    Event date: 2006.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  16. 水田土壌の原生生物群集に及ぼすメタンの影響

    村瀬 潤・Peter Frenzel

    土壌微生物学会 

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    Event date: 2006

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  17. A microbial food web in a rice field soil driven by methane oxidation. International conference

    11th International Symposium on Microbial Ecology 

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    Event date: 2006

    Language:English   Presentation type:Oral presentation (general)  

  18. The impact of protists on activity and structure of bacterial community in a flooded rice field soil. International conference

    ASLO Summer Meeting 

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    Event date: 2005

    Language:English   Presentation type:Oral presentation (general)  

  19. Methane dynamics in Lake Biwa. International conference

    The Goldschmidt Conference 2003 

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    Event date: 2003

    Language:English  

  20. Carbon dynamics in bottom sediment of Lake Biwa, Japan: origins, metabolism, and impact on the lake ecosystem. International conference

    The International Symposium on Response of Terrestrial Watershed Ecosystems in Monsoon Asia to Global Change (Kyoto, Japan) 

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    Event date: 2002

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  21. Chemical determination of microbially reducible manganese and iron in paddy soils and lake sediments. International conference

    17th World Congress of Soil Science 

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    Event date: 2002

    Language:English   Presentation type:Poster presentation  

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Works 4

  1. 環境と微生物の事典編集委員

    2012.4
    -
    2014.8

  2. 陸水学事典

    2006

  3. 熱帯農業事典

    2003

  4. 琵琶湖堆積物の生元素の空間的分布  1, 52-55(1998)

    1998

Research Project for Joint Research, Competitive Funding, etc. 2

  1. Study on microbial interactions in a rice field soil for controlling methane emission

    2010.10 - 2011.9

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    Grant type:Competitive

  2. メタンが涵養する土壌微生物群集の解析

    2006

KAKENHI (Grants-in-Aid for Scientific Research) 14

  1. 遺伝型・表現型が支配する水稲根圏の微生物食物連鎖構造と機能

    Grant number:20H02887  2020.4 - 2023.3

    村瀬 潤

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    Authorship:Principal investigator 

    Grant amount:\17940000 ( Direct Cost: \13800000 、 Indirect Cost:\4140000 )

    根圏は植物と土壌微生物の相互作用のホットスポットである。植物根が土壌微生物に特徴的な生育環境を提供する一方、植物の良好で健全な生長は根圏微生物群集の構成やはたらきと深い関係にある。原生生物による捕食作用は、細菌・糸状菌の群集構造や活性に影響を与える重要なファクターであると認識されているが、根圏での原生生物のはたらきが他の微生物および植物の生育に与える影響はほとんど明らかにされていない。本研究では、水稲根圏における微生物食物連鎖の構造とその機能を解析し、イネの品種と根圏微生物との連関を明らかにする。

  2. 田畑輪換圃場の微生物群集動態を長期継続調査し水田土壌微生物群集の安定性を解明する

    Grant number:18H02114  2018.4 - 2023.3

    浅川 晋

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    Authorship:Coinvestigator(s) 

    水田土壌中の微生物が極めて安定で頑健な群集を形成しているメカニズムの解明を目指し、田畑輪換圃場に注目し、田畑輪換による畑転換・水田復元に伴う各種土壌微生物群集の動態を長期間にわたり調査・解析する。田畑輪換の管理で生じる畑転換と水田復元が群集の存在量と構成に及ぼす影響や、群集の動態とその変化に影響を及ぼす要因を明らかにすることを目的とする。
    農研機構東北農業研究センター大仙研究拠点(秋田県大仙市)内の長期田畑輪換試験圃場の輪換区と対照の連年水田区より、水稲あるいはダイズの移植・播種前(4月)、生育中(8月)、収穫後(10月)の計3回にわたり作土層土壌を採取し、DNAおよびRNAの抽出用試料として調製・保存した。輪換区については2018年はダイズ作後水稲作に戻され3年目の水田であり、2019年は再度ダイズ畑へと転換された初年目である。RNAを対象にした解析により、偏性嫌気性であるメタン生成古細菌の活性は畑転換1年目の秋のダイズ収穫時より急激に減少することが示されている。そこで、2018年の10月から2019年の10月にかけて採取した試料について、培養法により培地で生育可能な活性を有するメタン生成古細菌および通性嫌気性を主体とする鉄還元菌の菌数の動態を調査した。メタン生成古細菌の菌数は連年水田区では湛水期間の8月に菌数が増加する傾向があった。輪換区では酢酸利用性の菌群の菌数は畑転換1年目の2019年10月には2018年10月よりも約1桁低下し、水素利用性の菌群の菌数はダイズ生育中の畑条件下であるものの2019年8月にやや増加する傾向を示したが、10月にはわずかに減少した。鉄還元菌の菌数は連年水田区では2019年8月に増加したが、輪換区では8月には増加せず、10月にはともに4月よりも約1桁減少した。以上より、嫌気性菌の中でも畑転換に対する菌群動態の応答が異なることが明らかになった。
    対象とする田畑輪換試験圃場より継続的に土壌試料の採取を続けるとともに、水田から畑に転換され、特に嫌気性の微生物群集の動態が大きな影響を受けると考えられる、2018年から2019年にかけての試料について菌群動態の特徴を明らかにすることができ、おおむね順調に研究が進展していると考えている。
    輪換区については2020年は畑転換2年目のダイズ畑となる予定であり、畑転換後の微生物群集の経時変化を解析するための試料採取と解析を進めていく予定であるが、新型コロナウイルスの感染拡大のためダイズあるいは水稲の播種・移植前(4月)の土壌試料の採取ができなかった。移動制限が解除され次第試料採取を行い、その後も対象とする田畑輪換試験圃場より土壌試料の採取を継続する予定である。

  3. Development of integrated soil management technology towards rehabilitation of degraded soils in the Tropics

    Grant number:18H02315  2018.4 - 2022.3

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    Authorship:Coinvestigator(s) 

  4. Submillimeter-scale visualization of rhizosphere effect using Cryo-TOF-SIMS/SEM

    Grant number:16K15075  2016.4 - 2020.3

    Murase Jun

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    Authorship:Principal investigator 

    Grant amount:\3640000 ( Direct Cost: \2800000 、 Indirect Cost:\840000 )

    Chemical environments of rice rhizosphere were visualized at the submillimeter scale. Roots of rice seedlings grown in soft agar media were sampled together with the surrounding media without destruction of rhizosphere structure, and the distribution of dissolve compounds in the shock frozen root and rhizosphere was analyzed by using the Cryo-TOF-SIMS/SEM system. The results successfully demonstrated the chemical gradients in the rice rhizosphere within a several hundred micrometers. Environmental gradients in the rice rhizosphere were also demonstrated from the spatial distribution of protists. In addition, we showed that protozoan grazing plays a pivotal role in shaping the bacterial community in the rice rhizosphere.

  5. Effects of fluctuation of redox potentials on microbial dynamics and gas metabolisms of wetland soils

    Grant number:16H05056  2016.4 - 2019.3

    Murase Jun

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    Authorship:Principal investigator 

    Grant amount:\17680000 ( Direct Cost: \13600000 、 Indirect Cost:\4080000 )

    Focusing on paddy soil, we analyzed the fluctuation of the redox boundary layer and the response of the microbial community. In the paddy soil surface layer, the dissolved oxygen concentration showed extremely large fluctuation from supersaturation to complete anoxia. The oxidation-reduction potential also changed dramatically in the paddy rice rhizosphere according to the growth of rice. Protozoa living in paddy soils are considered to play an important role as a predator in the redox boundary layer, as there are groups with suitable oxygen concentration or redox potential and a group adaptable to a wide range of oxygen concentrations. Although methane oxidation bacteria require oxygen for methane oxidation, they were able to maintain their activity for a long time even under anaerobic conditions. Microaerobic iron-oxidizing bacteria act in the surface.

  6. Response of gas metabolism and microbial community in soil in the permafrost zone of northeastern Siberia to the environmental change

    Grant number:16H05618  2016.4 - 2019.3

    Murase Jun

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    Authorship:Principal investigator 

    Grant amount:\16250000 ( Direct Cost: \12500000 、 Indirect Cost:\3750000 )

    We investigated the actual conditions of the metabolism of the greenhouse gas methane in the northeastern Siberian permafrost wetland and the microbial communities involved in it and the response to environmental changes. While the methane oxidation potential, which is the key to methane emission, is found to be higher than that of the other arctic wetland soils, it has been shown that its function as a deterrent to methane emission is weak. Also, regarding the composition of the soil microbial community, the difference from the other arctic soils was clarified, and the uniqueness of this area was clarified.

  7. Elucidating the cause of strange odor production in Lake Ogawarako

    Grant number:15K07532  2015.4 - 2018.3

    Maie Nagamitsu

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    Authorship:Coinvestigator(s) 

    We unveiled physical environments of water in Lake Ogawarako, and influence of extreme weather events such as strong wind and typhoons to it. A 22-63% of total nitrogen and 38-79% of total phosphorous were distributed in the water layer from 15 to 21 m, which occupied only 13% of whole lake water. Their percentages significantly changed temporally, as such the layer is considered to be the major source of nitrogen and phosphorous in the upper layer. Lake Ogawarako was divided into 3 sub-region with different phytoplankton composition. Since iron concentration in lake water increased in autumn, when cyanobacteria became dominant, iron could be playing a role in the propagation of filamentous cyanobacteria. We isolated 15 strains of filamentous cyanobacteria, 5 strains of which had 2-MIB synthesis gene.

  8. 土壌生態系の解剖学的解析ツールとしての人工土壌の開発

    2013.4 - 2016.3

    科学研究費補助金 

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    Authorship:Principal investigator 

  9. 水稲根圏におけるメタンの動態に関わる微生物食物連鎖の構造と機能の解析

    2013.4 - 2016.3

    科学研究費補助金  基盤研究(B)

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    Authorship:Principal investigator 

  10. メタン酸化をめぐる微生物食物連鎖の機能解析                   

    2008

    科学研究費補助金  基盤研究(C),課題番号:20580061

    村瀬 潤

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    Authorship:Principal investigator 

  11. Diversity and function of protists in wetland soils

    2003.10 - 2008.3

    Grant-in-Aid for Scientific Research 

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    Authorship:Principal investigator 

  12. 微生物還元性鉄・マンガンの化学的定量法の確立と環境動態解析への応用

    2001.7 - 2003.1

    科学研究費補助金  奨励研究(A)

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    Authorship:Principal investigator 

    科研費

  13. 湖沼におけるガス交換

    1999.7 - 2002.1

    科学研究費補助金  特定領域研究(B)(2)(計画)

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    Authorship:Coinvestigator(s) 

    科研費

  14. 21世紀の環境構造変化に対応できる「琵琶湖標準モデル」の開発

    1998.7 - 2000.1

    科学研究費補助金  基盤研究(A)(2)(一般)

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    Authorship:Coinvestigator(s) 

    科研費

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Teaching Experience (On-campus) 4

  1. 微生物生態学

    2015

  2. 微生物の科学

    2015

  3. Introduction to Bioagricultural Science

    2011

  4. Environment and Human Interface

    2011

Teaching Experience (Off-campus) 5

  1. 環境微生物学

    2010.4 - 2011.3 中部大学)

  2. 2005.4 - 2006.3 名古屋女子大学)

  3. 環境微生物学

    2009.4 - 2010.3 中部大学)

  4. 2003.4 - 2004.3 名古屋女子大学)

  5. 2003.4 - 2004.3 名城大学)

 

Social Contribution 2

  1. 岡崎北高校連携講座

    2012.8

  2. 経済学研究科オープンカレッジ

    2010.4 - 2012.3