Isolation and Structure Elucidation of Peronosporomycetes Hyphal Branching-Inducing Factors Produced by Pseudomonas jessenii EC-S101

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  • HATANO Eduardo
    Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University
  • HASHIDOKO Yasuyuki
    Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University
  • DEORA Abhinandan
    Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University
  • FUKUSHI Yukiharu
    Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University
  • TAHARA Satoshi
    Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University

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  • Isolation and structure elucidation of peronosporomycetes hyphal branching-inducing factors produced by Pseudomonas jesseni EC-S101
  • Isolation and Structure Elucidation of Peronosporomycetes Hyphal Branching-Inducing Factors Produced by<i>Pseudomonas jessenii</i>EC-S101

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Abstract

Pseudomonas jessenii EC-S101 produced hyphal branching-inducing and mitosis-accelerating factors active towards Peronosporomycetes, Aphanomyces cochlioides hyphae. In searching for the active substances, EtOAc-solubles extracted from EC-S101-cultured solid medium were fractionated under the guidance of a paper disc assay using an A. cochlioides mycelium. Two active substances were subsequently isolated and the structure was elucidated by spectroscopic analysis to be (+)-4,5-didehydroacaterin (1) and 3-[(1R)-hydroxyhexyl]-5-methylene-2(5H)-furanone (2), both of which accelerated the mitotic process of A. cochlioides hyphae along with excessive branching at 1.0 μg per disc. These compounds are likely to affect the morphophysiological development of certain eukaryotic organisms in the terrestrial ecosystem.

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