Retardation of Kimchi Fermentation and Growth Inhibition of Related Microorganisms by Tea Catechins

차엽카테킨의 김치발효 지연 및 관련 미생물의 증식억제

  • Wee, Ji-Hyang (Department of Food Science and Technology, Chonnam National University) ;
  • Park, Keun-Hyung (Department of Food Science and Technology, Chonnam National University)
  • Published : 1997.12.01

Abstract

The possible use of tea catechins as natural preservatives for kimchi was investigated in this study. Tea catechins separated from tea leaves had antimicrobial activity against microorganisms related to kimchi fermentation, such as Leuconostoc mesenteroides, Lactobacillus plantarum, Lactobacillus brevis, Pediococcus cerevisiae, Streptococcus faecalis. The degree of antimicrobial activity of catechins were different among microorganisms; that is 2 mg/mL to Leuconostoc mesenteroides, Lactobacillus plantarum, and Pediococcus cerevisiae, 4 mg/mL to Streptococcus faecalis, and 5 mg/mL to Lactobacillus brevis; however, Saccharomyces cerevisiae can not be inhibited. The effect of tea catechins on retardation of kimchi fermentation was tested by measuring changes in pH and acidity. The changes of pH and acidity of baechu-kimchi and mul-kimchi were remarkably inhibited by adding the tea catechins at the level of 2 mg/g fresh baechu. These results suggest that the tea catechins can be successfully used for the extension of shelf-life of kimchi.

차엽카테킨을 김치 천연보존제로서의 이용가능성을 검토하기 위하여 차엽에서 분말형태로 차엽카테킨을 조제하였다. 이 차엽카테킨을 김치산패에 관여하는 미생물인 St. feacalis, Leuc. mesenteroides, L. plantarum, L. brevis, P. cerevisiae와 Sachh. cerevisiae를 대상으로 항미생물 활성을 검정한 결과, Leuc. mesenteroides, L. plantarum, P. cerevisiae에 대해서는 2 mg/mL 첨가수준, St. faecalis는 4 mg/mL 첨가수준, L. brevis는 5 mg/mL 첨가수준에서부터 균의 생육이 억제되기 시작하였으나 Sacch. cerevisiae에 대한 생육억제효과는 낮았다. 차엽카테킨을 배추김치와 물김치에 첨가시기와 첨가수준을 달리하여 첨가하여 숙성중의 pH 및 산도의 변화를 측정한 결과, 두종의 김치 모두 2 mg/g 첨가수준 이상에서 pH저하와 산도증가가 억제되어, 김치의 천연보존제 및 산패억제제로서 차엽카테킨의 이용가능성이 시사되었다.

Keywords