Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Biological Control of Plant Pathogens by Bacillus sp. AB02.

Bacillus sp. AB02를 이용한 식물 병원균에 대한 생물검정

  • Kim, Keun-Ki (School of Applied Life Science and Pusan National University) ;
  • Kim, Yong-Chul (School of Resources and Life Science, Pusan National University) ;
  • Choi, Young-Whan (School of Resources and Life Science, Pusan National University) ;
  • Sin, Taek-Sun (School of Resources and Life Science, Pusan National University) ;
  • Park, Ki-Do (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Kang, Ui-Gum (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Choi, Yong-Lark (Department of Biotechnology, Faculty of Natural Resources and Life Science, Dong-A University) ;
  • Park, Hyean-Cheal (School of Applied Life Science and Pusan National University)
  • 김근기 (부산대학교 생명응용과학부) ;
  • 김용철 (부산대학교 생명자원과학부) ;
  • 최영환 (부산대학교 생명자원과학부) ;
  • 신택순 (부산대학교 생명자원과학부) ;
  • 박기도 (농촌진흥청 작물과학원 영남농업연구소) ;
  • 강위금 (농촌진흥청 작물과학원 영남농업연구소) ;
  • 최용락 (동아대학교 생명자연과학부) ;
  • 박현철 (부산대학교 생명응용과학부)
  • Published : 2008.06.30
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Abstract

In the greenhouse fields for fruits and vegetables during the winter in Korea, there are serious damages by the sclerotium diseases due to the low temperature and humidity. This study was carried out to select an antagonic agent for the biological control of the sclerotium diseases. The 55 antagonic agents were selected from the rhizosphere in soil where the fruits and vegetables were cultivated in the green house fields, and strain AB02 among the tested isolates was estimated to be the strongest antagonist against the sclerotium disease. Using strain AB02, the antifungal spectrum was tested against 5 different plant pathogens. According to the results of the test, strain AB02 . showed the high antagonistic effect against Botrytis cinerea and Sclerotinia sclerotiorum. For the experiment of biological control against the sclerotium disease, it was estimated the suppression effect and the control effect by the strain in the pot experiment using the green perilla. According to the result of the pot experiments, the suppression effect was 40% and the control effect was 62%, respectively. For the stimulation effect of the tested plant growth by strain AB02 compared to the control, it was improved as 120% for the total length, 141% for the liveweight, 121% for the total number of leaves, 185% for the leaf area, and 327% for the liveweight of the root, respectively. Strain AB02 showing the antagonistic effect against the sclerotium disease and the stimulation effect for the plant growth was identified as Bacillus sp.

겨울철 과채류 시설 재배 단지에서는 저온 다습하여 균핵병 발생이 많아 피해가 심각하기 때문에, 미생물을 이용한 생물학적 방제법으로 균핵병을 방제하고자 길항균을 분리하였다. 시설 재배 토양으로부터 길항세균 55종을 분리하였으며, 분리한 길항세균 중에 가장 활성이 뛰어난 균주를 AB02 균주로 명명하고 이를 이용하여 식물병원균 5종에 대한 항균 스펙트럼을 조사하였다. 그 결과 잿빛곰팡이병원균인 Botrytis cinerea와 균핵병원균인 Sclerotinia sclerotiorum에 항균효과가 뛰어났다. AB02 균주의 균핵병에 대한 생물학적 방제실험은을 위해 들깨 pot 실험으로 병발생 억제효과와 병 방제효과를 조사했다. 그 결과 균핵병 발생 억제효과는 40%로 나타났고, 병 방제효과는 62%로 아주 높게 나타났다. AB02 균주의 식물 생육 촉진 효과는 전장이 120%, 생체중량이 141% 증가되었으며, 엽수와 엽면적은 각각 121%와 185%의 생육 촉진 효과를 보였다. 그리고 뿌리 생육조사에서는 생체 중량이 무처리 보다 327% 증가하였다. 항균활성과 식물 생육 촉진 활성을 갖는 AB02 균주를 동정한 결과, Bacillus sp.로 확인되었다.

Keywords

References

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