생명과학회지 (Journal of Life Science)

  • 제16권6호
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  • Pages.994-1000
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  • 2006
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
권호 표지
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스테비아 추출물 발효액에서 분리된 유효 미생물들의 동정 및 항미생물 활성

Identification of Effective Microorganisms Isolated from Fermented Stevia Extract and Their Antimicrobial Activity

  • 이태형 (동국대학교 과학기술대학 생명공학과) ;
  • 박수상 ((주)엽록 스테비아) ;
  • 이용억 (동국대학교 과학기술대학 생명공학과)
  • 발행 : 2006.10.01
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초록

스테비아(Stevia rebaudiana Bertoni)는 남미가 원산지인 국화과의 감미식물이다. 스테비아추출물 발효액으로부터 세균 23균주와 효모 10균주를 분리하여 일반적인 분류학적 방법과 분자유전학적 방법으로 동정하였다. 스테비아추출물 발효액에서 분리된 균주들은 5속 10종의 세균과 1종의 효모균에 속하는 것으로 나타났다.16S와 18S rDNA 염기서열 분석에 근거하여 계통수를 작성하였다. 분리균들의 항미생물 활성을 여러 세균과 식물병원성 진균들에 대해 조사하였다. 분리균들 중에서는 Lactobacillus paracasei SB13이 광범위한 세균들에 대해서 강한 항균활성을 나타내었다. 이들 결과는 토양개량을 위한 친환경적 미생물 제제를 개발하는데 도움을 줄 것이다.

Stevia rebaudiana Bertoni is a sweet herb of the Asteraceae family originally derived from South America. Twenty three bacterial strains and ten yeast strains were isolated from fermented Stevia extract and identified by general taxonomic methods and molecular genetic method. Isolated strains from fermented Stevia extract include ten species of bacteria which belong to five genus and one species of yeast. Based on 16S and 18S rDNA sequence analysis, phylogenetic trees were constructed. Antimicrobial activity of the isolated strains was examined against various bacteria and plant-pathogenic fungi. Among them, Lactobacillus paracasei SB13 showed strong antibacterial activity towards a wide range of bacteria. These results may be useful to develop environmentally friendly microbial agent for soil improvement.

키워드

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