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Origin of lactic acid bacteria in mulkimchi fermentation

  • Hwang, Chung Eun (Department of Food Science, Gyeongnam National University of Science and Technology) ;
  • Haque, Md. Azizul (Department of Biochemistry & Molecular Biology, Hajee Mohammad Danesh Science & Technology University) ;
  • Hong, Su Young (Food Science Research Institute, SBT Business Division, Kolmar BNH Inc.) ;
  • Kim, Su Cheol (Department of Food Science, Gyeongnam National University of Science and Technology) ;
  • Cho, Kye Man (Department of Food Science, Gyeongnam National University of Science and Technology)
  • Received : 2019.09.05
  • Accepted : 2019.11.22
  • Published : 2019.12.31

Abstract

The assortment of endophytic lactic acid bacteria (LAB) in kimchi derives from its raw vegetables, which include Chinese cabbage, radish, welsh onion, onion, garlic, red pepper, and ginger. These vegetables were examined during mulkimchi fermentation using gene-specific multiplex polymerase chain reaction and 16S ribosomal RNA sequence analysis. Sixteen species from five LAB genera (Leuconostoc, Lactobacillus, Lactococcus, Pediococcus, and Weissella) appeared in the raw kimchi materials. Interestingly, nine LAB species were identified in mulkimchi on fermentation day 0 as follows: Leuconostoc carnosum, Leuconostoc citreum, Leuconostoc gelidum, Leuconostoc inhae, Leuconostoc mesenteroides, Lactobacillus plantarum, Lactobacillus sakei, Lactococcus lactis, and Weissella confusa. Seven additional LAB species were present in mulkimchi at fermentation day 9 as follows: Leuconostoc gasicomitatum, Leuconostoc kimchii, Lactobacillus brevis, Lactobacillus curvatus, Lactobacillus pentosus, Pediococcus pentosaceus, and Weissella koreensis. These species corresponded completely with the LAB in kimchi vegetables. Wei. confusa was the predominant LAB during early fermentation (pH 6.20 to 4.98 and acidity 0.20 to 0.64%), while Lac. sakei, Lac. plantarum, and Wei. koreensis became dominant later in fermentation (pH 4.98 to 3.88 and acidity 0.64 to 1.26%). These results collectively demonstrate that the LAB involved in mulkimchi fermentation originates from the raw vegetables examined.

Keywords

References

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