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Optimum cultivation conditions for mass production of antagonistic bacterium Pseudomonas azotoformans HC5 effective in antagonistic of brown blotch disease caused by Pseudomonas tolaasii

버섯 세균갈색무늬병균(Pseudomonas tolaasii)에 대한 길항세균 Pseudomonas azotoformans HC5의 대량배양을 위한 최적 배양조건

  • 이찬중 (농촌진흥청 국립원예특작과학원 버섯과) ;
  • 문지원 (농촌진흥청 국립원예특작과학원 버섯과) ;
  • 유영미 (농촌진흥청 국립원예특작과학원 버섯과) ;
  • 한주연 (농촌진흥청 국립원예특작과학원 버섯과) ;
  • 정종천 (농촌진흥청 국립원예특작과학원 버섯과) ;
  • 공원식 (농촌진흥청 국립원예특작과학원 버섯과)
  • Received : 2015.06.15
  • Accepted : 2015.06.29
  • Published : 2015.06.30

Abstract

This study was conducted to investigate optimum conditions for mass production of antagonistic microbes Pseudomonas azotoformans HC5. P. azotoformans HC5 is a potent biological control agent to control brown blotch disease caused by Pseudomonas tolaasii. This markedly showed the antagonistic activity against P. tolaasii, the most destructive pathogen of cultivated mushrooms. To define the optimum conditions for the mass production of the P. azotoformans HC5, we have investigated optimum culture conditions and effects of various nutrient source on the bacterial growth. The optimum initial pH and temperature were determined as pH 6.0 and $15^{\circ}C$, respectively. The optimal concentration of medium elements for the growth of pathogen inhibitor bacterium was determined as follows: 0.6% adonitol, 1.5% yeast extract, 0.8% $NH_4H_2PO_4$, 5mM $MgSO_4$, and 0.2% asparagine.

버섯 세균갈성색무늬병원균인 Pseudomonas tolaasii에 대한 길항미생물로 보고된 Pseudomonas azotoformans HC5 균주의 배양적 특성과 대량 배양을 위한 최적배양 조건을 설정하였다. HC5 균주의 생육온도는 $10{\sim}20^{\circ}C$, pH는 6.0~9.0의 범위에서 왕성한 생육을 보였다. 대량배양을 위한 효율적인 영양원 선발을 위하여 기본배지에 탄소원 fructose 등 18종, 무기질소원 $NH_4Cl$ 등 6종, 유기질소원 peptone 등 6종 그리고 아미노산 asparagine 등 11종을 각각 1%씩 첨가하였고, 무기염류 13종을 1 mM 농도로 첨가하여 각각에 대한 생육에 미치는 영향을 조사하였다. 또한 선발된 각각의 영양성분들에 대한 최적 농도를 조사하기 위하여 각각의 성분을 최소 0.1%에서 최대 4.0%까지 배지에 첨가하여 배양 후 생육정도를 조사하였다. 그 결과, 대량배양을 위한 생육최적조건은 온도 $15^{\circ}C$, pH 6, 탄소원 0.6% adonitol, 유기질소원 1.5% yeast extract, 무기질소원 0.8% $NH_4H_2PO_4$, 아미노산 0.2% asparagine 그리고 무기염류는 5 mM $MgSO_4$에서 왕성한 생육을 보였다.

Keywords

References

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