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http://dx.doi.org/10.5352/JLS.2021.31.10.922

Comparison of Microbial Community Compositions between Doenjang and Cheonggukjang Using Next Generation Sequencing  

Ha, Gwangsu (Microbial Institute for Fermentation Industry (MIFI))
Kim, JinWon (Microbial Institute for Fermentation Industry (MIFI))
Shin, Su-Jin (Microbial Institute for Fermentation Industry (MIFI))
Jeong, Su-Ji (Microbial Institute for Fermentation Industry (MIFI))
Yang, Hee-Jong (Microbial Institute for Fermentation Industry (MIFI))
Jeong, Do-Youn (Microbial Institute for Fermentation Industry (MIFI))
Publication Information
Journal of Life Science / v.31, no.10, 2021 , pp. 922-928 More about this Journal
Abstract
To profile the microbial compositions of Korean traditional fermented paste made from whole soybeans, Doenjang and Cheonggukjang, and compare their taxonomic differences, we analyzed the V3-V4 region of 16S rRNA of naturally fermented foods by using next generation sequencing. α-Diversity results showed that values indicating bacterial community abundances (OTUs) and richness (ACE, Chao1) were statistically significant (p=0.0001) in Doenjang and Cheonggukjang. Firmicutes was the most common phylum in both groups, representing 97.02% and 99.67% in the Doenjang and Cheonggukjang groups, respectively. Bacillus was the most dominant genus, accounting for 71.70% and 59.87% in both groups. Linear discriminant (LDA) effect size (LEfSe) analysis was performed to reveal the significant ranking of abundant taxa in different fermented foods. A size-effect threshold of 2.0 on the logarithmic LDA score was used for discriminative functional biomarkers. On the species level, Bacillus subtilis, Tetragenococcus halophilus, and Clostridium arbusti were significantly more abundant in Doenjang than in Cheonggukjang, whereas Bacillus thermoamylovorans, Enterococcus faecium, and Lactobacillus sakei were significantly more abundant in Cheonggukjang than in Doenjang. Permutational multivariate analysis of variance (PERMANOVA) showed that the statistical difference in microbial clusters between the two groups was significant at the confidence level of p=0.001. This research could be used as basic research to identify the correlation between the biochemical characteristics of Korean fermented foods and the distribution of microbial communities.
Keywords
Cheonggukjang; doenjang; microbiome; next generation sequencing;
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