한국균학회지 (The Korean Journal of Mycology)

  • 제43권4호
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  • Pages.253-259
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  • 2015
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  • 0253-651X(pISSN)
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  • 2383-5249(eISSN)
한국균학회 (The Korean Society of Mycology)
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길항균주를 이용한 고추탄저병균(Colletotrichum acutatum) 방제 및 식물생장촉진효과

Control of Colletotrichum acutatum and Plant Growth Promotion of Pepper by Antagonistic Microorganisms

  • Han, Joon-Hee (Department of Applied Biology, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Kim, Moon-Jong (Department of Applied Biology, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Kim, Kyoung Su (Department of Applied Biology, College of Agriculture and Life Sciences, Kangwon National University)
  • 투고 : 2015.09.14
  • 심사 : 2015.11.25
  • 발행 : 2015.12.31
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초록

고추 탄저병은 국내 고추재배에 가장 큰 피해를 일으키며, Colletotrichum acutatum이 주요 원인균이다. 본 연구에서는 포장에서 고추탄저병의 방제와 식물생장촉진효과를 선발된 길항미생물을 이용하여 평가하였다. 4개의 길항미생물은 이전 연구를 통하여 고추포장(GJ01, GJ11)과 갯벌(LB01, LB14)에서 선발하였다. 4개의 길항미생물은 대조균주 EXTN-1을 포함하여 C. acutatum과 대치배양에서 길항효과를 보였다. 식물생장촉진효과를 알아보기 위해 고추종자의 발아율과 초기생장효과, 그리고 포장에서 식물의 생장효과를 검정하였다. 그 결과 4개의 선발균주는 모두 식물생장효과가 있었다. 그 중에서도 GJ01은 초기생육에서 가장 높은 생장효과를 보였으며, GJ11은 포장에서 가장 높은 고추수확량을 얻었다. 그리고 포장에서 탄저병의 방제효과는 4개의 길항미생물 처리에 의해 63.2~72.5%의 방제가를 보였다. 현재 연구를 토대로 4개의 길항미생물은 고추 탄저병에 대한 잠재적인 생물학적 방제제로서의 가능성을 보여주었다.

Anthracnose caused by Collectotrichum acutatum is the most devastating disease of pepper plants in Korea. In this study, we evaluated the effect of selected antagonistic bacteria on control of anthracnose and plant growth promotion of pepper plants under field conditions. Four different bacterial isolates used in the current study were isolated from the pepper rhizosphere (GJ01, GJ11) and tidal flat (LB01, LB14) in previous studies. Four bacterial isolates, together with a control strain (EXTN-1), showed antifungal activity against C. acutatum in a dual culture assay. To test for plant growth promotion effect, seedling vigor index and growth parameters of pepper were measured under field condition. As a result, all four bacterial isolates were effective for improving plant growth promotion. The strain GJ01 was the most effective in improving the seedling vigor on pepper, but the strain GJ11 in increasing the pepper fruit yield. The incidence of anthracnose was inhibited in the range of 63.2~72.5% by treatment of four bacterial isolates. The current study indicated that the four bacterial isolates could be used as potential biological control agents of anthracnose disease of pepper.

키워드

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