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Comparison of microbial diversity and metabolites on household and commercial doenjangopen access

Authors
Yul Lee, HeeHaque, Md. AzizulYong Cho, DuBin Jeong, JongHo Lee, JiYoung Lee, GaYeun Jang, MuHwan Lee, JinMan Cho, Kye
Issue Date
Mar-2024
Publisher
Elsevier Ltd
Keywords
Doenjang; Free amino acids; Isoflavones; Metagenome; Microbial diversity; Volatile flavor compounds
Citation
Food Chemistry: X, v.21
Indexed
SCOPUS
Journal Title
Food Chemistry: X
Volume
21
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/69425
DOI
10.1016/j.fochx.2023.101101
ISSN
2590-1575
2590-1575
Abstract
In this study, the microbial diversity, free amino acid (FAA), and biological activities of household doenjang (HDJ) from four different regions and commercial doenjang (CDJ) four manufacturers were analyzed. And volatile flavor compound (VFC) and isoflavone profiles were analyzed using gas chromatograph-mass spectrometer (GC-MS) and high performance liquid chromatography (HPLC), respectively. The major bacterial genus in 1HDJ and 2HDJ was Bacillus (97.5%), while in 3HDJ and 4HDJ, it was Enterobacter (47.5%) and Pseudomonas (80%), respectively. Tetragenococcus was the main bacterial genus of CDJ. The Zygosaccharomyces genus among yeast was comparatively high in all samples. In all samples, glutamic acid predominated among the FAAs, and the 3-methyl butanal, benzeneacetaldehyde, and diallyl disulphide were major VFCs. CDJ contained higher levels of isoflavone-glycoside and total phenolics. Except for 3HDJ and 4CDJ, the isoflavone-aglycone and total flavonoid contents were higher in HDJ. The correlation between bacterial genus and metabolited of doenjang showed that Tetragenococcus was closely related to glutamic acid, Bacillus was related to aglycones and ammonia, and Pseudomonas was highly related to isovaleric acid. While, correlation between yeast genus and metabolited of doenjang confirmed that Candida, Hanseniaspora, and Saccharomyces were related with furfural, benzeneacetaldehyde, and 3-methyl butanal, respectively. The results of this study can be utilized as basic data for the industrialization and development of doenjang. © 2023
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