Antifungal Activities of Equisetin, Zearalenone, and 8'-Hydroxyaearalenone Isolated from Fusarium Species against Plant Pathogenic Fungi.

Fusarium속 균주로부터 분리한 Equisetin, Zearalenone 및 8'-Hydroxyzearalenone의 식물병원곰팡이에 대한 항균활성

  • 김진철 (한국화학연구원 농약스크리닝연구팀) ;
  • 박중협 (한국화학연구원 농약스크리닝연구팀) ;
  • 최경자 (한국화학연구원 농약스크리닝연구팀) ;
  • 김흥태 (한국화학연구원 농약스크리닝연구팀) ;
  • 최용호 (한국화학연구원 농약스크리닝연구팀) ;
  • 조광연 (한국화학연구원 농약스크리닝연구팀)
  • Published : 2002.12.01

Abstract

Antifungal substances were isolated from solid cultures of Fusarium equiseti FO-68 obtained from arrowhead and Fusarium sp. FO-510 obtained from egg plant, and then their antifungal activities were investigated against plant pathogenic fungi in vitro and in vivo. An antifungal substance was purifed from rice solid cultures of F. equiseti FO-68 and identified as equisetin. In addition, two antibiotic substances were isolated from solid cultures of Fusarium sp. FO-510 and their chemical structures were determined to be zearalenone and 8'-hydroxyzearalenone. in vitro, equisetin and zearalenone inhibited mycelial growth of most of the plant pathogenic fungi tested, whereas 8'-hydroxyzearalenone hardly inhibited fungal growth. In vitro, equisetin effectively controlled the development of tomato gray mold and tomato late blight. Zearalenone exhibited in vivo antifungal activity against rice blast, rice sheath blight, tomato gray mold, and tomato late blight. However, 8'-hydroxyzearale-none did not control the development of plant diseases except tomato gray mold. This is the first report on the antifungal activities of equisetin, zearalenone, and 8'-hydroxyzearalenone.

Keywords

Antifungal substance;Fusarium sp.;equisetin;zearalenone;8'-hydroxyzearalenone

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