Biological activities of Fusarium isolates from soil and plants

토양 및 식물체로부터 분리한 Fusarium속 균주들의 생물활성

  • Park, Joong-Hyeop (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Choi, Gyung-Ja (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Heung-Tae (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Hong, Kyung-Sik (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Song, Cheol (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Seog (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Jeong-Gyu (Department of Agricultural Chemistry, Korea University) ;
  • Cho, Kwang-Yun (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Cheol (Screening Division, Korea Research Institute of Chemical Technology)
  • 박중협 (한국화학연구소 농약활성연구팀) ;
  • 최경자 (한국화학연구소 농약활성연구팀) ;
  • 김흥태 (한국화학연구소 농약활성연구팀) ;
  • 홍경식 (한국화학연구소 농약활성연구팀) ;
  • 송철 (한국화학연구소 농약활성연구팀) ;
  • 김진석 (한국화학연구소 농약활성연구팀) ;
  • 김정규 (고려대학교 응용생명환경화학과) ;
  • 조광연 (한국화학연구소 농약활성연구팀) ;
  • 김진철 (한국화학연구소 농약활성연구팀)
  • Published : 2000.09.30

Abstract

In order to select potent bioactive isolates, 70 Fusarium isolates obtained from soil and 21 plant species were screened by antifungal, insecticidal, herbicidal, and duckweed bioassays after culturing in potato dextrose broth and rice solid media. Eight (11.4%) of the 70 liquid broth cultures showed disease-controlling activities more than 80% against at least one of the 6 plant diseases tested. Fusarium sp. FO-68 isolate exhibited the most potent antifungal activity; it controlled rice blast, wheat leaf rust, and barley powdery mildew with control values more than 95%. Out of 70 solid cultures, 21 (30.0%) controlled at least one plant disease more than 80% and F. equiseti FO-68 isolate showed disease-controlling activities more than 95% against 3 plant diseases such as rice blast, tomato late blight, and wheat leaf rust. As for tile insecticidal activities, 2 liquid and 1 solid cultures showed potent insecticidal activities against pest insects more than 80%, Liquid cultures of F. oxysporum FO-61 and Fusarium sp. FO-80 isolates exhibited insecticidal activities more than 80% against green peach aphid and diamondback moth, respectively. The solid culture of Fusarium sp. FO-510 isolate had 80% insecticidal activity against green peach aphid. However, none of liquid and solid cultures of the 70 Fusarium isolates showed potent herbicidal activities against 10 upland weeds. As the results of duckweed assay, 3 liquid cultures showed 70% growth inhibitory activity at concentrations less than 1.25% of culture supernatants and 9 solid cultures had a potent inhibitory activity against duckweed growth. On the other hand, there was a significant correlation between antifungal activities and herbicidal activities against duckweed of both liquid and solid cultures of tile 70 Fusarium isolates.