Linear 3-Hydroxybutyrate Tetramer (HB4) Produced by<i>Sphingomonas</i>sp. Is Characterized as a Growth Promoting Factor for Some Rhizomicrofloral Composers

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  • OGITA Noriko
    Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University
  • HASHIDOKO Yasuyuki
    Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University
  • LIMIN Suwido H.
    Faculty of Agriculture, Palangkaraya University
  • TAHARA Satoshi
    Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University

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タイトル別名
  • Linear 3-Hydroxybutyrate Tetramer (HB4) Produced by Sphingomonas sp. Is Characterized as a Growth Promoting Factor for Some Rhizomicrofloral Composers
  • Linear 3-hydroxybutyrate tetramer (HB4) produced by Sphingomonas sp. is characterized as a growth stimulating factor of some rhizobacterial composers

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説明

Sphingomonas spp. of α-proteobacteria often play a role in assisting the development of microfloral communities under adverse soil conditions. Using a Frateuria sp. as an indicator for bacterial growth assay, we investigated the bacterial growth-promoting factor in the culture fluids of Sphingomonas sp. EC-K085. This factor was successfully isolated and identified as linear (R,R,R,R)-3-hydroxybutyrate tetramer (HB4), having a hydroxy-end and a carboxy-end group. When 28 μg of HB4 was charged on a paper disc, impregnated Frateuria sp. cells in modified Winogradsky agar medium exhibited a promoted cell growth to form a clear colony emerging zone after a 2-day incubation.

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