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Studies on Fungal Metabolism of Phytoalexins

Research Project

Project/Area Number 63560116
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 製造化学・食品
Research InstitutionHokkaido University

Principal Investigator

TAHARA Satoshi  Hokkaido University, Faculty of Agriculture Associate Professor, 農学部, 助教授 (50001475)

Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1989: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1988: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsPhytoalexin / Fungal Metabolism / Antifungal Compound / Prenylated Isoflavone / Isoflavonoid / Leguminosae / Botrytis cinerea / Epoxy-intermediate / ファイトアレキシンの代謝 / プレニルイソフラボン / 微生物代謝 / 植物由来抗菌物質 / 解毒代謝 / 防御物質
Research Abstract

Fungal metabolism of phytoalexins was investigated by using prenylated isoflavones and related compounds as substrates, and Botrytis cinerea and Aspergillus flavus. Research results are summarized as follows. (1) 7-O-Methyl-luteone (1) and 7-O-Methyl-2,3-dehydrokievitone (2) both chemically derivated from the corresponding isoflavones, topazolin (3) isolated from Lupinus luteus and piscidone from the root barks of Piscidia erythrina were metabolized by two fungi. A 6-prenylated flavone 3 was metabolized as 6-prenylated isoflavone had been. The prenyl group at C-6' in 4 was successfully transformed into the corresponding cyclic ether by B. cinerea. (2) The major metabolite from 1 was confirmed to be 2,2-dimethyl-3-hydroxypyranoisoflavone with dextrorotatory nature. The stereochemistry was estimated to be S-configuration. (3) Compound 2 was rapidly metabolized not by A. flavus, but by B. cinerea to yield an epoxy-derivative at the double bond in the prenyl side chain and a glycol. The latter metabolite revealed to be S-isomer with which the acid hydrolyzate (stereo-retention) of the epoxide agreed well. Therefore the configuration of the epoxy-intermediate was confirmed to be S. The presence of an epoxy-intermediate in the metabolism of a prenylated compound into a dihydrofurano- or dihydropyrano-cyclic ether and/or a 2,3-dihydrodihydroxy- prenyl derivative was thus confirmed for the first time.
Isoflavonoidal constituents in white lupin (L. albus) were precisely examined and the structures of complex lupin isoflavones suggested that they were presumably produced from prenylated isoflavones via epoxy-intermediates. The biogenedis for lupin isoflavones was thus closely related to their fungal metabolism.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] S.Tahara,F.Hanawa,Y.Harada and J.Mizutani: "A Fungitoxin Inducibly Produced by Dandelion Leaves Treated with Cupric Chloride" Agric.Biol.Chem.52. 2947-2948 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S.Tahara,S.Orihara,J.L.Ingham and J.Mizutani: "Seventeen Isoflavonoids from Lupinus albus Roots" Phytochemistry. 28. 901-911 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 田原哲士,J.L.Ingham,水谷純也: "7-0-Methyl-luteoneのBotrytis cinereaによる代謝産物" 日本農芸化学会誌. 63. 999-1007 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S.Tahara,J.L.Ingham,and J.Mizutani: "Identification of an Epoxy-intermediate Resulting from the Fungal Metabolism of a Prenylated Isoflavone" Phytochemistry. 28. 2079-2084 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S.Tahara,S.Shibaki,J.L.Ingham and J.Mizutani: "Further Isoflavonoids from White Lupin Roots" Z.Naturforsch.45c. 82-88 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S.Tahara,E.Narita,J.Mizutani and J.L.Ingham: "New Rotenoids from the Root Bark of Jamaican Dogwood(Piscidia erythrinaL.)" Z.Naturforsch.45c,No3-4. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 田原哲士,吉原照彦,朝日田康司ら編(分担執筆): "生物生産効率の向上に関する研究" 北海道大学農学部, 27 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 田原哲士(分担執筆),香山彊編: "森林資源の効果的育成と有効利用に関する総合的研究" 北海道大学農学部, 9 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara, F. Hanawa, Y. Harada and J. Mizutani: "A Fungitoxin Inducibly Produced by Dandelion Leaves Treated with Cupric Chloride" Agric. Biol. Chem., 52, 2947-2948 (1988).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara, S. Orihara, J. L. Ingham and J. Mizutani: "Seventeen Isoflavonoids from Lupinus albus Roots" Phytochemistry, 28, 901-911 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara, J. L. Ingham and J. Mizutani: "Metabolites of 7-O-Methyl-luteone from Botrytis cinerea" Nippon Nogeikagaku Kaishi, 63, 999-1007 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara, J. L. Ingham and J. Mizutani: "Identification of Epoxy-intermediate Resulting from the Fungal Metabolism of a Prenylated Isoflavone" Phytochemistry, 28, 2079-2804 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara, S. Shibaki, J. L. Ingham and J. Mizutani: "Further Isoflavonoids from White Lupin Roots" Z. Naturforsch., 45C, 82-88 (1990).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara, E. Narita, J. Mizutani and J. L. Ingham: "New Rotenoids from the Root Bark of Jamaican Dogwood (Piscidia erythrina)" Z. Naturforsch., 45C, No. 3/4 (1990).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara and T. Yoshihara (a part): "Studies on the Improvement of Bio-production, ed, by K. Asahida et al., Faculty of Agriculture, Hokkaido University" pp. 80-106, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S. Tahara (a part): "General Studies on Efficient Cultivation and Usage of Wood Resources, ed. by T. Kayama, Faculty of Agriculture, Hokkaido University" pp. 207-215, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] S.Tahara,F.Hanawa,Y.Harada and J.Mizutani: "A Fungitoxin Inducibly Produced by Dandelion Leaves Treated with Cupric Chloride" Agric.Biol.Chem.,. 52. 2947-2948 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Tahara,S.Orihara,J.L.Ingham and J.Mizutani: "Seventeen Isoflavonoids from Lupinus albus Roots" Phytochemistry,. 28. 901-911 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 田原哲士,J.L.Ingham,水谷純也: "7-0-Methyl-luteoneのBotrytis cinereaによる代謝産物" 日本農芸化学会誌. 63. 999-1007 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Tahara,J.L.Ingham and J.Mizutani: "Indentification of an Epoxy-intermediate Resulting from the Fungal Metabolism of a Prenylated Isoflavone" Phytochemistry. 28. 2079-2084 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Tahara,S.Shibaki,J.L.Ingham and J.Mizutani: "Further Isoflavonoids from White Lupin Roots" Z.Naturforsch.,. 45C. 82-88 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Tahara,E.Narita J.Mizutani and J.L.Ingham: "New Rotenoids from the Root Bark of Jamaican Dogwood(Piscidia erythrina L.)" Z.Naturforsch.,No.3-4. 45C. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 田原哲士,吉原照彦,朝日田康司ら編(分担執筆): "生物生産効率の向上に関する研究" 北海道大学農学部, 27 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] 田原哲士(分担執筆)香山彊編: "森林資源の効果的育成と有効利用に関する総合的研究" 北海道大学農学部, 9 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] John L.Ingham: Z.Naturforsch. 43C. 5-10 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Satoshi,Tahara: Agric Biol Chem. 52. 2947-2948 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] John L.Ingham: Z.Naturforsch.

    • Related Report
      1988 Annual Research Report
  • [Publications] Satoshi,Tahara: Phytochemistry. 28. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] Satoshi,Tahara: Phytochemistry. 28. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 田原哲士: 日本農芸化学会誌. 63(5). (1989)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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