Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Isolation of Antimicrobial Substance by Produced Bacillus sp. SD-10 with Antagonistic Activity Towards Mushroom Pathogens

버섯병원균에 대한 길항세균 Bacillus sp. SD-10이 생산하는 항균물질의 분리

  • 이상원 (진주산업대학교 미생물공학과) ;
  • 류현순 (진주산업대학교 미생물공학과) ;
  • 갈상완 (진주산업대학교 미생물공학과) ;
  • 박기훈 (경상대학교 농업생명과학과) ;
  • 김철호 (진주산업대학교 미생물공학과) ;
  • 최영주 (신라대학교 식품영양학과)
  • Published : 2004.06.01
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Abstract

Bacillus sp. SD-10 was investigated to develope biological pesticides for control of mushroom diseases. Bacillus sp. SD-10 showed high antifungal activity when cultured at 35∼4$0^{\circ}C$ for 30∼4$0^{\circ}C$. The culture filtrate of the bacterium inhibited the growth of mycelium of T. virens which is a kind of mushroom pathogene. On the test of inhibition of spore germination of T. virens, more than 5% of the culture filtrate in the media inhibited completely the germination of the spores. An antimicrobial substance, UPX-1 was purified from the culture filtrate of the Bacillus. From the $^1H$-NMR and $^{13}C$-NMR spectrum analysis, the substance was indentifed as disaccharide composed to six carbon sugars. UPX-1 has not only strong antifungal activity against T. virens but also antibacterial activity against Pseudomonas tolaassi.

Bacillus sp. SD-10이 생산하는 항균물질을 이용하여 버섯의 갈색무늬병균 및 푸른곰팡이병균에 대한 천연물 버섯병해 방제약재 개발을 위한 기초적 연구를 행하였다. Bacillus sp. SD-10은 35∼4$0^{\circ}C$의 배양온도에서 30∼40 hrs 배양하였을 때 가장 높은 항균활성을 나타내었다. 이 배양액을 이용하여 T. virens의 균사 생육저해 및 포자발아 억제 농도를 검토한 결과, 균사생육은 30 ul 이상 처리 시 뚜렷하게 저해되었으며 포자발아는 평판배지에 5%(v/v) 이상 첨가 시 완전하게 억제되었다. Bacillus sp. SD-10의 배양액으로부터 항균물질을 순수분리하여 UPX-1으로 명명하고, UPX-1을 $^1H-$NMR과 $^{13}C$-NMR 스펙트럼으로 구조를 동정한 결과 탄소 6개로 구성된 당 2개가 2당류 구조로 결합되어 있는 화합물임이 밝혀졌다. UPX-1은 T. virens 뿐 아니라 Pse. tolaassi에도 아주 강한 항균효과를 나타내었다.

Keywords

References

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