Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Identification and Biological Activity of Two New Phytotoxins Isolated from Botrytis cinerea

Botrytis cinerea로부터 분리한 두 개의 새로운 phytotoxin의 구조 결정 및 생물활성

  • Kim, Geum-Jung (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology) ;
  • Yoon, Mi-Young (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology) ;
  • Kim, Heung-Tae (Department of Plant Medicine, Chungbuk National University) ;
  • Choi, Gyung-Ja (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology) ;
  • Jang, Kyoung-Soo (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology) ;
  • Choi, Yong-Ho (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology) ;
  • Park, Myung-Soo (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology) ;
  • Cha, Byeong-Jin (Department of Plant Medicine, Chungbuk National University) ;
  • Kim, Jin-Cheol (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
  • 김금정 (한국화학연구원 산업바이오화학연구센터) ;
  • 윤미영 (한국화학연구원 산업바이오화학연구센터) ;
  • 김홍태 (충북대학교 식물의학과) ;
  • 최경자 (한국화학연구원 산업바이오화학연구센터) ;
  • 장경수 (한국화학연구원 산업바이오화학연구센터) ;
  • 최용호 (한국화학연구원 산업바이오화학연구센터) ;
  • 박명수 (한국화학연구원 산업바이오화학연구센터) ;
  • 차병진 (충북대학교 식물의학과) ;
  • 김진철 (한국화학연구원 산업바이오화학연구센터)
  • Published : 2009.08.01
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Abstract

We discovered two novel phytotoxins produced by the pathogenic fungus, Botrytis cinerea. Among the twenty-five B. cinerea isolates, which were obtained from various host plants in 1994 and 1996, twenty-two showed strong or moderate pathogenicity on five plants such as cucumber, tomato, red pepper, tobacco and Chinese cabbage. The culture filtrate of the B. cinerea 2-16 strain showed the most potent phytotoxic activity in a tobacco leaf-wounding assay. Two novel phytotoxins were isolated from the liquid cultures of B. cinerea 2-16 by ethyl acetate extraction, flash silica gel column chromatography, silica gel column chromatography, Sephadex LH-20 column chromatography, preparative TLC and subsequently preparative HPLC. Their chemical structures were determined to be 3-O-acetyl botcinol and 3-O-acetyl botcinolide, respectively, by mass and NMR spectral analyses. These two phytotoxins caused leaf necrosis in a leaf-wounding bioassay, and significant electrolyte leakage from leaf tissues of tobacco. In the two bioassays tested, 3-O-acetyl botcinol exhibited stronger phytotoxic activity than 3-O-acetyl botcinolide. This is the first report on the production of both 3-O-acetyl botcinol and 3-O-acetyl botcinolide from B. cinerea.

Botrytis cinerea가 생산하는 phytotoxin이 병원성에 미치는 영향을 조사하던 중에 두 개의 새로운 phytotoxin을 발견하였다. 1994년과 1996년에 여러 식물체로부터 분리한 Botrytis cinerea 균주들을 기주별, 지역별, 형태적 특성별로 25개의 균주를 선별한 후 단포자 분리를 실시하였다. 22균주는 오이, 토마토, 고추 담배, 배추 등 5가지 식물에 대해 강하거나 중간 정도의 병원성을 보였다. 그러나 KJ 균주를 포함한 3균주는 병원성이 매우 약하였다. 식물에 대한 phytotoxicity를 조사하기 위하여 25균주의 배양 여액을 담배잎에 leaf-wounding assay를 실시한 결과 2-16균주가 가장 강한 활성을 보였다. 따라서 2-16 균주의 배양액을 ethyl acetate로 추출한 후 flash silica gel column chromatography, silica gel column chromatography, Sephadex LH-20 column chromatography, preparative TLC 및 preparative HPLC 등을 통하여 두 개의 phytotoxin을 분리하였다. 분리한 phytotoxin을 질량분석과 핵자기 공명분석을 통해 구조동정을 실시한 결과 3-O-acetyl botcinol과 3-O-acetyl botcinolide로 동정하였다. 두 개의 물질은 leaf-wounding bioassay에서 잎에 괴사를 일으켰으며, 또한 담배 잎에서 심각한 전해질 누출을 일으켰다. 두 생물검정에서 3-O-acetyl botcinol이 3-O-acetyl botcinolide보다 강한활성을보였다. B. cinerea가 생산한 두 개의 phytotoxin에 대해서는 본 논문에서 처음으로 보고하는 바이다.

Keywords

References

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