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Effect of NaCl Adaptation on the Thermotolerance and Alcohol Fermentation in Saccharomyces cerevisiae KNU5377.  

백상규 (경북대학교 미생물학과)
윤혜선 (경북대학교 미생물학과)
사금희 (경북대학교 미생물학과)
김일섭 (경북대학교 미생물학과)
이인구 (경북대학교 농화학과)
박희동 (경북대학교 식품공학과)
유춘발 (대구대학교 식품공학과)
진익렬 (경북대학교 미생물학과)
Publication Information
Microbiology and Biotechnology Letters / v.31, no.1, 2003 , pp. 63-68 More about this Journal
Abstract
Saccharomyces cerevisiae KNU5377 is a constitutively thermotolerant, fermentative strain at high temperatures over 4$0^{\circ}C$. The exposure to 0.5 M NaCl caused S. cerevisiae KNU5377 to be lost its constitutive thermotolerance. Furthermore, the NaCl adaptation beyond 0.3 M during the overnight culture forced the strain-specific fermentation ability of S. cerevisiae KNU5377 to be disappeared. However, these phenomena did not occur in the reference, Saccharomyces cerevisiae ATCC24858. As a result, this adaptation led both strains to show the closely similar thermotolerance level and alcohol fermentation ability, implying the NaCl adaptation eliminated its strain-specific characteristics of S. cerevisiae KNU5377 Therefore it indicated that the superior intrinsic characteristics of S. cerevisiae KNU5377 must be related to the NaCl adaptation. On the other hand, the heat adaptation elevated alcohol productivity for both strains, but surprisingly did it for KNU5377 at the rate of two times higher than the reference's one; this suggests that KNU5377 possesses more efficient system enough to cause the difference. Consequently, these characteristics of S. cerevisiae KNU5377 must be interesting targets for further study to understand on how KNU5377 could acquire the constitutive thermotolerance and the outstanding fermentative capacity at high temperatures.
Keywords
Saccharomyces cerevisiae; NaCl adaptation; thermotolerance; alcohol fermentation;
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Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 2
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