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2002 Fiscal Year Final Research Report Summary

Chemical disease-resistance mechanism during seedling stage

Research Project

Project/Area Number 12660104
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Bioproduction chemistry/Bioorganic chemistry
Research InstitutionRIKEN INSTITUTE

Principal Investigator

SUZUKI Yoshikatsu  RIKEN INSTITUTE Polymer Chemistry Lab. Senior Scientist, 高分子化学研究室, 副主任研究員 (00087579)

Project Period (FY) 2000 – 2002
KeywordsDisease-resistant mechanism / rice / 5-alkylresorcinol
Research Abstract

The main aim of this science program is to understand the production and metabolisms as well as disease-resistant mechanism of 5-alkylresorcinols as phytoanticipins during rice seedling stage.
1. Disease-resistance effects of ARs : In vitro conidia-germination and mycelia-growth tests using rice-blight disease fungus (Magnaporthe grisea) and an in vivo infection test suggested that ARs play a some role on disease-resistant mechanism as a phytoanticipin.
2. ARs metabolisms : New two metabolites (AR-A8 and AR-A10) of ARs were isolated from etiolated rice-seedlings that were irradiated for 2 days, and their structures determined based on GC-MS and ^1H-NMR spectra. These metabolites seemed to be produced via oxidative double-bond cleavage of unsaturated carbon-chains in ARs (AR15 : 1 , AR17 : 1 s, AR17 : 2). From the finding of AR-A10 metabolite, a new homolog of AR17 : 1 , 5-(10'-heptadecenyl) resorcinol was identified.
3. Classification of rice varieties based on AR-homolog composition : AR-homo log composition and their amounts were examined for 13 varieties of Japonica-type rices. The homolog compositions had a close relationship to disease- resistant-gene types. Especially, the composition of 3 varieties that produce a trace amount of ARs largely different from those with the other domestic- and indica-type genes.
4. ARs biosynthesis : In efficient 5-alkylresorcinol-producing, etiolated rice seedlings, feedings of odd-number fatty acid ester substrates increased only the homologs expected from the predicted ARs biosynthetic pathway. In addition, the dodecyl homolog that was biosynthesized from [^<13>C]-labeled substrate obviously showed that fatty acid unit acted as a direct precursor and formed the side-chain moiety of 5-alkylresorcinol via the predicted biosynthesis pathway.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Y.Suzuki, H.Takahashi, Y.Esumi, T.Arie, T.Morita, H.Koshino, M.Uramoto, I.Yamaguchi: "A new antifungal diketopperazine produced by Nectria haematococca Berk.et Br.(8870ia-1) causing Nectria blight disease on ornamental plants"J.Antibiotic. 53・1. 45-49 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Zarnowski, Y.Suzuki, Y, Y.Esumi, S.J.Pietr: "5-n-Alkylresorcinols from the green microalga Apatococcus constipatus"Phytochemistry. 55. 975-977 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] E.Magunuka, R.Zarnowski, Y.Suzuki, I.Yamaguchi, S.J.Pietr, A.Kozubek: "The influence of herbicides on biosynthesis of antifungal resorcinols by rye seedlings"Bulletin of the polish Academy of Science Biological Sciences. 49. 361-369 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Esumi, Y.Suzuki, Y.Itoh, M.Uramoto, K.Kiumra, M.Yoshihama, T.Ichikawa: "Propeptin, a new inhibitor of polyl endopeptidase produced by Microbispora II. Determination of chemical structure"J.Antibiotic.. 55・3. 296-300 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Zarnowski, Y.Suzuki, I.Yamaguchi, S.J.Pietr: "Alkylresorcinols in barley (Hordeum vulgare L.distichon) grains"Z.Naturforsch. 57c. 57-62 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Esumi, Y.Suzuki, T.Ichikawa, Y.Ikeda, K.Kimura: "SNF-4794: New enzyme inhibitors produced by Chaetomella sp"J.Anitbiotic. 56・2. 169-172 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 編集:安部浩, 桑野栄一, 児玉治, 鈴木義勝, 藤村真: "次世代の農薬開発"日本農薬学会(ソフトサイエンス社). 316 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Suzuki, H. Takahashi, Y. Esumi, T. Arie, T. Morita, H. Koshino, M. Uramoto and I. Yamaguchi: "Haematocin, a new antifungal diketopiperazine produced by Nectria haematococca Berk. et Br. (8880701a- 1 )causing Nectria blight disease on ornamental plants"J. Antibiotic. 53 (1). 45-49 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Zarnowski, Y. Suzuki, Y. Esumi, and S. J. Pietr: "5-n-Alkylresorcinols from the green microalga Apatococcus constipatus"Phytochemistry. 55. 975-977 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] E. Magunuka, R. Zarnowski, Y. Suzuki, I. Yamaguchi, S. J. Pietr and A. Kozubek: "The influence of herbicides on biosynthesis of antifungal resorcinols by rye seedlings"Bulletin of the polish Academy of Sciences Biological Sciences. 49. 361-369 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Esumi, Y. Suzuki, Y. Itoh , M. Uramoto, K. Kimura, M. Yoshihama, T. Ichikawa: "Propeptin, a new inhibitor of prolyl endopeptidase produced by Microbispora II. Determination of chemical structure"J. Antibiotic. 55 (3). 296-300 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Zarnowski, Y. Suzuki, I. Yamaguchi and S. J. Pietr: "Alkylresorcinols in Barley (Hordeum vulgare L. distichon) grains"Z. Naturforsch.. 57c. 57-62 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Esumi, Y. Suzuki, T. Ichikawa, Y. Ikeda, and K. Kimura: "SNF-4794 : New enzyme inhibitors produced by Chaetomella sp."J. Antibiotic. 56 (2). 169-172 (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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