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http://dx.doi.org/10.7845/kjm.2013.3061

Isolation and Identification of Bacillus Strains with Antagonistic Properties against Film-forming Yeasts Overgrown in Low Salted Soybean Pastes  

Jeon, SaeBom (Department of Biological Sciences, Chonbuk National University)
Ryu, MyeongSeon (Department of Biological Sciences, Chonbuk National University)
Kim, Yong Sang (Department of Biological Sciences, Chonbuk National University)
Jo, Seung Wha (Sunchang Research Center for Fermentation Microbes (SRCM))
Jeong, Do Yeon (Sunchang Research Center for Fermentation Microbes (SRCM))
Uhm, Tai-Boong (Department of Biological Sciences, Chonbuk National University)
Publication Information
Korean Journal of Microbiology / v.49, no.3, 2013 , pp. 286-291 More about this Journal
Abstract
Soybean pastes with 8% (w/w) salinity were prepared instead of soybean paste with 14% (w/w) salinity to meet the growing demands of Korean's low sodium diet. After aging, white films had appeared on the surface of all low-salted soybean pastes [8% (w/w) salinity] unlike high-salted soybean pastes [14% (w/w) salinity]. All of eight microbes isolated from the surface film were identified as Pichia kudriavzevii. Eleven Bacillus strains with good characteristics of fermentation were isolated from traditionally fermented soybean pastes in order to preserve their unique flavors and aromas after aging, and as a result of analyzing the biochemical characteristics and 16S rRNA sequences, those were identified as B. subtilis, B. licheniformis, and B. methylotrophicus. All of the Bacillus isolates had antagonistic activities against 8 isolates of the film-forming yeasts and harbored the genes for synthesis of antimicrobial surfactants including lichenysin and/or surfactin.
Keywords
Bacillus; Pichia; antagonistic property; film-forming yeasts; low-salted soybean paste;
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Times Cited By KSCI : 6  (Citation Analysis)
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