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논문 상세정보

김치에서 분리한 세균인 Lactobacillus plantarum YK-9의 식중독 원인세균에 대한 항균활성 및 특성

Antibacterial Activity against Food-poisoning Causing Bacteria and Characterization of Lactobacillus plantarum YK-9 Isolated from Kimchi

KSBB Journal v.24 no.3 , 2009년, pp.273 - 278  
초록

본 연구는 김치에서 분리한 Lactobacillus plantarum YK-9의 다양한 특성을 조사하기 위하여 실시되었다. 형태학적 관찰 및 생리화학적 특성에 대하여 조사하였다. 16S rRNA 염기서열 분석을 통해 균주를 동정하였고, 그 결과 Lactobacillus plantarum로 확인되었고, L. plantarum YK-9으로 명명하였으며, 이 균주는 GenBank에 [FJ669130]로 등재하였다. 배양 시간에 따른 L. plantarum YK-9의 생장과 pH의 변화를 조사하였으며, 대사산물로서 유기산 (lactic acid와 acetic acid)의 생성은 HPLC를 통하여 확인하였다. 유기산의 생성은 L. plantarum YK-9의 생장에 따라 증가 하는 것을 확인하였다. 초기 pH 7.0은 배양 기간동안 3.6으로 감소하였고, 배양 72시간이 지난 후 생성된 lactic acid와 acetic acid의 농도는 각각 588.7 mM과 255.5 mM이었다. 식중독 원인균인 S. aureus, B. cereus, L. monocytogenes, E. coli, E. faecalis, S. enteritidis에 대하여 20배로 농축된 YK-9 배양 상등액에 처리하여 항균력을 조사하였으며, 실험에 사용된 6가지 식중독 원인세균 모두에 대한 항균효과가 있는 것이 관찰되었고, 이는 유기산 생성에 기인하는 것으로 나타났다.

Abstract

The purpose of this work was to investigate the antibacterial activity of Lactobacillus plantarum YK-9 isolated from fermented Kimchi. Morphological and biochemical characteristics of L. plantarum YK-9 were examined. Phylogenetic analysis using 16S rRNA sequencing was performed to identify the strain, and the strain could be assigned to Lactobacillus plantarum, designated as L. plantarum YK-9. The strain was registered in GenBank as [FJ669130]. During the incubation period of L. plantarum YK-9, the changes of bacterial growth and residual organic acids were monitored. HPLC was used to confirm the organic acids produced in the cultures as metabolites. L. plantarum YK-9 produced both lactic acid and acetic acid, which were responsible for the pH decrease during growth. Initial pH 7.0 of the cultures decreased to 3.6 at the incubation after 72 hours, and concentrations of lactic acid and acetic acid increased to approximately 588.7 mM and 255.5 mM, respectively. The antibacterial activities against food-poisoning causing bacteria were examined with 20-fold concentrated culture supernatants from L. plantarum YK-9, and the antibacterial effects were clearly observed against all the bacteria tested in this work.

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이 논문을 인용한 문헌 (3)

  1. Ahn, Hye-Ran ; So, Jae-Seong ; Oh, Kye-Heon 2011. "Characterization and Antimicrobial Activity of Lactic Acid Bacteria Isolated from Vaginas of Women of Childbearing Age" Korean journal of microbiology = 미생물학회지, 47(4): 308~315 
  2. Baek, Hyun ; Choi, Moon-Seup ; Oh, Kye-Heon 2012. "Characterization and Antibacterial Activity of Lactobacillus casei HK-9 Isolated from Korean Rice Wine, Makgeolli" KSBB Journal, 27(3): 161~166 
  3. Choi, Moon-Sup ; Yun, Hyun-Myoung ; Oh, Kye-Heon 2014. "Studies on the Functional Properties of Lactic Acid Bacteria Isolated from Home-made Yogurt and Commercial Yogurt" Korean journal of microbiology = 미생물학회지, 50(1): 8~14 

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