Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Biological Control of Perilla Culture by Burkhoderia sp. AK-17

Burkhoderia sp. AK-17에 의한 잎들깨 재배의 생물학적 조절

  • Kim, Keun-Ki (Department of Biotechnology, Miryang National University) ;
  • Kim, Yong-Kyun (Department of Biotechnology, Miryang National University) ;
  • Son, Hong-Joo (Department of Biotechnology, Miryang National University) ;
  • Choi, Young-Whan (Department of Horticulture, Miryang National University) ;
  • Kang, Kyu-Young (Division of Enviro-Biotechnology and Food Science and Technology, Gyeongsang National University)
  • Published : 2005.03.31
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Abstract

There are various crop diseases in green houses that are caused by the cultural environments, especially high temperature and moisture. To solve the forementioned problems, farmers are overusing agricultural chemicals, causing other damages by the chemical residue. In this study, antagonistic bacteria as biological control agents were isolated to produce the environmentally-friendly crops for use in green houses. Eighteen species of antagonistic bacteria were totally isolated from the soil and plants in the Perilla fields, and AK-17 showed the highest activity among the isolates. According to the results of anti-fungal spectrum against several pathogens by AK-17, the antagonism effect of the isolates was remarkable against grey mold rot by Botrytis cinerea, sclerotinia rot by Sclerotnia sclerotiorum, and stem rot by Rhizoctonia solini. To evaluate the biological control effects of the isolates against the major diseases of Perilla, studies were carried out to evaluate the preventive and the curative effects of the diseases throughout the pot experiments. According to the forementioned experiments, the preventive and the curative effects by the isolates against sclerotinia rot were respectively showed as 55% and 92%. For the grey mold rot, those were 40% and 78%, respectively. As to the evaluation of the growth-promoting effect by AK-17, the length and the biomass of the tested plants were increased to 120% and to 164%, respectively. For the leaf numbers and area were respectively increased to 120% and 220%. Furthermore, AK-17 was identified as Burkhoderia sp. according to the results of physiological properties and genetic methods.

시설원예단지의 재배환경은 고온다습으로 많은 병해가 발생하며, 이를 방제하기위해 과다한 농약을 사용하므로 농약 잔류성에 대한 피해가 심각한 우려를 낳고 있다. 미생물을 이용한 생물학적 방제법 개발로 청정 시설원예작물을 생산할 목적으로 길항균을 분리하였다. 잎들깨 재배토양과 식물체로부터 길항세균 18종을 분리하였으며 분리한 길항세균 중에 AK-17이 가장 활성이 뛰어나 이를 이용하여 주요 식물병원균에 대한 항균스펙트럼을 조사하였다. 그 결과 잿빛곰팡이병원균의 Botrytis cinerea와 균핵병원균의 Sclerotinia sclerotiorum 및 줄기썩음병원균인 Rhizoctonia solani에 대한 항균효과가 뛰어났다. 잎들깨의 주요 병에 대한 생물학적 방제실험은 병발생 억제효과와 병 방제효과를 pot 실험으로 실시했다. 그 결과 균핵병은 55%의 병발생 억제호과와 92%의 방제효과가 있었고, 잿빛곰팡이병은 40%의 병발생 억제효과와 78%의 방제효과를 확인할 수 있었다. AK-17의 식물 생육촉진효과는 신장이 120%, 생체중이 164% 증가되었으며, 엽수와 엽면적은 각각 120%와 220%의 증가효과를 보였다. 그리고 AK-17을 생리 생화학적방법과 유전학적 방법으로 동정한 결과, Burkhoderia sp.로 확인되었다.

Keywords

References

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