한국유기농업학회지 (Korean Journal of Organic Agriculture)

  • 제22권4호
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  • Pages.855-868
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  • 2014
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  • 1229-3571(pISSN)
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  • 2287-819X(eISSN)
한국유기농업학회 (Korean Association of Organic Agriculture)
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파프리카에 발생하는 주요 병원균에 대한 길항미생물, Serratia marcescens-YJK1, 분리와 특성

The Isolation and Characterization of the Antagonistic Microorganisms, Serratia marcescens-YJK1, for Major Pathogens on Paprika

  • 양수정 (전북대학교 농생물학과) ;
  • 김형무 (전북대학교 농생물학과 식물의학연구센터) ;
  • 주호종 (전북대학교 농생물학과 식물의학연구센터)
  • 투고 : 2014.11.10
  • 심사 : 2014.11.15
  • 발행 : 2014.12.31
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초록

파프리카에 발생하는 병들을 방제하기 위하여 합성농약이 광범위하게 사용되어왔지만 최근에 수많은 농약사용의 부작용에 대한 관심이 증가 하고 있다. 파프리카 주요병인 잿빛곰팡이병, 줄기 및 과실썩음병, 역병, 균핵병, 시들음병을 방제하기 위한 미생물을 분리하고 특성을 파악하기 위하여 본 연구를 실시하였다. 지방산분석과 16S rDNA 염기배열은 이 연구에서 분리한 YKJ1가 Serratia marcescens 그룹에 속하는 것을 밝혔다. 특히, YKJ1의 16S rDNA 염기배열은 S. marcescens의 염기서열과 99% 상동성을 보였다. 광학현미경을 통해 YKJ1처리에 의해 병원균의 포자 발아 및 균사 생장이 저해됨을 확인 하였다. YKJ1처리는 팽윤균사와 같은 현저한 형태적 변화와 세포벽의 분해를 유발하였다. 역병균의 경우 유주자낭의 형성이 억제되었다. 본 연구에서 동정한 S. marcescens는 S. marcescens-YKJ1으로 부르고자 한다. 포장실험등과 같은 시험이 차후 더 요구되어지나 파프리카의 주요 병관리를 위한 생물적 방제제의 하나로 가치가 있을 것으로 생각된다.

Synthetic agro-chemicals have been widely used to control diseases on paprika but these days negative attention has been increasing to use of them because of several adverse effects. This research was conducted to isolate and to characterize the antagonistic microorganism to control major paprika diseases, gray mold rot, fruit and stem rot, phytophthora blight, sclerotium rot, and wilt disease. Analysis of the fatty acid and analysis of the 16S rDNA gene sequence revealed that YKJ1 isolated in this research belongs to a group of Serratia marcescens. Specially, 16S rDNA gene sequence of YKJ1 showed 99% of sequence similarity with S. marcescens. Observation through the optical microscope revealed that YKJ1 suppressed the spore germination and the hyphal growth of pathogens. YKJ1 treatment on pathogens induced marked morphological changes like hyphal swelling and degradation of cell wall. In the case of phytophthora blight, the zoosporangium formation was restrained. S. marcescens found in this study call as S. marcescens-YKJ1 and it may be valuable as one of biological control agents against major diseases of paprika in the future even though it is require to be tested with more study on field test.

키워드

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