期刊
BIOMED RESEARCH INTERNATIONAL
卷 2020, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2020/1979318
关键词
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资金
- Open Research Fund of State Key Laboratory of Biological Fermentation Engineering of Beer [6602415015]
- First classgrassland science discipline programme in Shandong Province, China
- National Natural Science Foundation of China [31860011, 31600059]
- Talents of High Level Scientifc Research Foundation of Qingdao Agricultural University [6651117005, 6651119011]
Saccharomyces cerevisiae is a typical fermentation yeast in beer production. Improving ethanol tolerance of S. cerevisiae will increase fermentation efficiency, thereby reducing capital costs. Here, we found that S. cerevisiae strain L exhibited a higher ethanol tolerance (14%, v/v) than the fermentative strain Q (10%, v/v). In order to enhance the strain Q ethanol tolerance but preserve its fermentation property, protoplast fusion was performed with haploids from strain Q and L. The fusant Q/L-f2 with 14% ethanol tolerance was obtained. Meanwhile, the fermentation properties (flocculability, SO2 production, alpha-N assimilation rate, GSH production, etc.) of Q/L-f2 were similar to those of strain Q. Therefore, our works established a series of high ethanol-tolerant strains in beer production. Moreover, this demonstration of inactivated protoplast fusion in industrial S. cerevisiae strain opens many doors for yeast-based biotechnological applications.
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