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Screening of Lactic Acid Bacteria as a Starter Culture in Fermented Sausage

발효소시지 제조에 적합한 스타터 선발

  • Yoo, Seon-A (Department of Food and Nutrition, Dongshin University) ;
  • Seo, Seung-Ho (Department of Food and Nutrition, Dongshin University) ;
  • Park, Seong-Eun (Department of Food and Nutrition, Dongshin University) ;
  • Son, Hong-Seok (Department of Food and Nutrition, Dongshin University)
  • Received : 2014.04.08
  • Accepted : 2014.06.30
  • Published : 2014.08.31

Abstract

The aim of this study was to select the most suitable starter cultures for production of fermented sausages. A total of 27 strains isolated from Korean fermented foods and natural substances were characterized with respect to their physicochemical properties in a fluid (submerged) model system modified according to the special conditions of fermented sausages. Three of these strains were pre-selected for testing as potential cultures based on their ability to grow fast and initiate rapid acidification. The selected strains were identified by API and partial sequence analysis of 16S rRNA. The results exhibited sequence similarity to known sequences of Staphylococcus warneri, Staphylococcus epidermidis and Lactobacillus plantarum. Among them, relatively good growth properties and nitrite reduction activities were detected for S. epidermidis and L. plantarum and low pH values and high total acidities were observed in the model system fermented with these isolates compared with reference strains.

본 연구에서는 전통발효식품 13종과 천연물 4종에서 27균주를 분리한 후 생육속도가 빠르고 pH 저하 능력이 우수한 3종의 균주를 1차 선발하였으며, 분자생물학적 방법을 이용하여 동정한 결과 Staphylococcus warneri, Sta. epidermidis, Lactobacillus plantarum과 99% 상동성을 보였다. 선발된 3균주의 발효소시지 스타터로서 이용가능성을 알아보기 위해 발효소시지의 환경과 유사한 model-system에서 배양하며 pH 저하 능력, 총산 생성 능력, 생육 능력, 아질산염 소거 능력을 발효소시지의 스타터로 많이 사용되고 있는 5균주 및 상업용 2균주와 비교하였다. Modelsystem에서 pH 저하능과 총산 생성능, 생육능은 관련성이 있었으며, 상업용 균주보다 분리한 Sta. epidermidis DO 10-1, Lac. plantarum MLK 14-2가 우수한 결과를 나타내었다. 아질산염 소거능의 경우에도 분리한 3균주가 상업용 균주보다 상대적으로 빠른 속도를 보였다. 분리한 3균주는 발효소지지 스타터로서의 발효 소거 능력은 우수할 것으로 보이지만 Staphylococcus는 잠재적인 위험성이 제기되는 균주이므로 Lac. plantarum이 발효소지지 제조에 가장 적합할 것으로 사료된다.

Keywords

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