Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus  

To the head of this page.▲

University 【 display / non-display 】

  • 1971.04
    -
    1975.03

    The University of Tokyo   Faculty of Agriculture   Department of Fisheries   Graduated

To the head of this page.▲

Graduate School 【 display / non-display 】

  • 1975.04
    -
    1980.03

    The University of Tokyo  Graduate School, Division of Agriculture  Doctor's Course  Completed

To the head of this page.▲

Study abroad experiences 【 display / non-display 】

  • 1982.04
    -
    1983.05

    Department of Microbiology  

To the head of this page.▲

Academic degree 【 display / non-display 】

  • The University of Tokyo -  Doctor of Agriculture

To the head of this page.▲

External Career 【 display / non-display 】

  • 1980.04
    -
    1982.03

    Ocean Research Institute, the University of Tokyo  

  • 1982.04
    -
    1983.05

    University of Maryland  

To the head of this page.▲

Published Papers 【 display / non-display 】

  • Bacterial response to glucose addition: growth and community structure in seawater microcosms from North Pacific Ocean.

    Haider MN, Iqbal MM, Nishimura M, Ikemoto E, Ijichi M, Kogure K

    Scientific reports ( Scientific Reports )  13 ( 1 ) 341   2023.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Diversity and Composition of Microbial Communities in an Eelgrass (<i>Zostera marina</i>) Bed in Tokyo Bay, Japan

    Md Mehedi Iqbal, Masahiko Nishimura, Md. Nurul Haider, Masayoshi Sano, Minoru Ijichi, Kazuhiro Kogure, Susumu Yoshizawa

    Microbes and Environments ( Japanese Society of Microbial Ecology )  36 ( 4 ) n/a - n/a   2021 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    • Access this article
      DOI Open Access

  • Bacterial enhancement of gel particle coagulation in seawater

    Yosuke Yamada, Hideki Fukuda, Yuya Tada, Kazuhiro Kogure, Toshi Nagata

    Aquatic Microbial Ecology ( Inter-Research )  77 ( 1 ) 11 - 22   2016 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    Gel-like particles are ubiquitous in marine environments, affecting global carbon cycles, but the mechanisms controlling gel particle coagulation in seawater are not entirely clear. We investigated whether marine bacteria enhance the coagulation of gel particles. Gel particles composed of polysaccharides with an equivalent spherical diameter (ESD) of 0.01 cm were suspended in seawater contained in rotating tubes to examine time course changes in particle ESD and abundance. Marine bacterial assemblages strongly enhanced the coagulation of gel particles into large aggregates (ESD, 0.1 to 1 cm) over a period of 24 to 96 h. Catalyzed reporter deposition fluorescence in situ hybridization revealed that one group of bacteria that grew rapidly was affiliated with the genus Pseudoalteromonas. Experiments using Pseudoalteromonas spp. isolates indicated that 6 of 11 isolates enhanced gel particle coagulation. This enhancement differed greatly by species. High settling velocities, up to 270 m d-1, were determined for the large aggregates. Our results demonstrate that bacteria can substantially enhance gel particle coagulation and the formation of fast-settling large aggregates in seawater.

    • Access this article
      DOI

  • Aurantivirga profunda gen. nov., sp nov., isolated from deep-seawater, a novel member of the family Flavobacteriaceae

    Jaeho Song, Ahyoung Choi, Mihye Im, Yochan Joung, Susumu Yoshizawa, Jang-Cheon Cho, Kazuhiro Kogure

    INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY ( SOC GENERAL MICROBIOLOGY )  65   4850 - 4856   2015.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    A Gram-stain-negative, aerobic, proteorhodopsin-containing, orange, rod-shaped bacterium, designated SAORIC-234(T), was isolated from deep seawater in the Pacific Ocean. 16S rRNA gene sequence analysis revealed that the strain could be affiliated with the family Flavobacteriaceae of the phylum Bacteroidetes and shared less than 94.6 % similarity with other species of the family with validly published names. The phenotypic characteristics of this novel isolate, such as growth properties and enzyme activities, could be differentiated from those of other species. The strain was non-motile, oxidase-positive and catalase-negative. The G+C content of the genomic DNA was determined to be 34.8 mol% and menaquinone-6 (MK-6) was the predominant isoprenoid quinone. The predominant fatty acids were iso-C-15 iso-C-15 G, iso-C-16 (:) (0) 3-OH, iso-C-17 (:) (0) 3-OH and iso-C-15 (:) (0) 3-OH. The major polar lipids comprised phosphatidylethanolamine, three unknown aminolipids and three unknown lipids. On the basis of the taxonomic data collected in this study, it was concluded that strain SAORIC-234(T) represents a novel genus and species in the family Flavobacteriaceae, for which the name Aurantivirga profunda gen. nov., sp. nov. is proposed. The type strain of the type species, Aurantivirga profunda sp. nov., is SAORIC-234(T) (=NBRC 110606(T)=KACC 18400(T)).

    • Access this article
      DOI
    • Search related information
      PubMed

  • Aureicoccus marinus gen. nov., sp nov., a member of the family Flavobacteriaceae, isolated from seawater

    Sanghwa Park, Susumu Yoshizawa, Yuki Muramatsu, Yasuyoshi Nakagawa, Akira Yokota, Kazuhiro Kogure

    INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY ( SOC GENERAL MICROBIOLOGY )  63   1885 - 1890   2013.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    A coccoid and amorphous-shaped, non-gliding, proteorhodopsin-containing, yellow bacterium, designated strain SG-18(T), was isolated from seawater in the western North Pacific Ocean near Japan. The strain was Gram-stain-negative, obligately aerobic, heterotrophic and oxidase-positive. It hydrolysed aesculin but not DNA, urea, gelatin or agar. Growth occurred in the presence of 1 5 % NaCl, with optimum growth at 2% NaCl. The strain grew at 15-37 degrees C with an optimum temperature of 25-30 degrees C. The DNA G+C content of the genomic DNA of strain SG-18(T) was 47.0 mol% (HPLC). The predominant isoprenoid quinone was MK-6, and major cellular fatty acids were iso-C-15:1 G, iso-C-15:0, iso-C-15:0 3-OH. Phylogenetic trees generated by using 16S rRNA gene sequences revealed that strain SG-18(T) belonged to the family Flavobacteriaceae and showed 92.7% sequence similarity to the most closely related species, Croceitalea eckloniae DOKDO 025(T). On the basis of phenotypic and phylogenetic features, strain SG-18(T) is classified as representing a novel species of a new genus within the family Flavobacteriaceae, for which the name Aureicoccus marinus gen. nov., sp. nov. is proposed. The type strain of the type species is SG-18(T) (=NBRC 108814(T)=KCTC 23967(T)).

    • Access this article
      DOI
    • Search related information
      PubMed

display all >>

To the head of this page.▲

Books 【 display / non-display 】

  • A Tale of the Thymidine Incorporation Method

    ( Part: Other )

    1994

To the head of this page.▲

Other Papers 【 display / non-display 】

display all >>

To the head of this page.▲