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Food microbiology v.70, 2018년, pp.206 - 213   SCI SCIE
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Hydrogen sulfide synthesis in native Saccharomyces cerevisiae strains during alcoholic fermentations

Wang, Chunxiao    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China   ); Liu, Meiling    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China   ); Li, Ying    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China   ); Zhang, Yujie    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China   ); Yao, Mingyue    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China   ); Qin, Yi    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China   ); Liu, Yanlin    (College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China  );
  • 초록  

    Abstract In order to diminish the undesirable impact of hydrogen sulfide (H 2 S) on wine, H 2 S synthesis was evaluated at phenotypic and transcriptional levels in 16 strains of Saccharomyces cerevisiae , which comprised 12 natural isolates, three commercial strains, and one laboratory heterozygote. Strain-dependent and multi-gene participation traits were evident, and high gene activity did not necessarily elevated H 2 S levels. When the variation of gene expression was analyzed between fermentation stages in each strain, similarities among some strains related to H 2 S formation. UCD522 and seven strains with low H 2 S production were grouped together based on cluster analysis and fold-change analysis. They displayed a negative relationship between activity of MET17 , HOM2 , SER33 and CYS4 and H 2 S formation, suggesting the role of biosynthesis of sulfur-containing amino acids. In the CECLFE1225, CECLFE1226 and UCD819 strains, transcriptional variation in MET3 , MET5 and MET10 might account for the changes in H 2 S amount. High levels of HOM2 and SER33 expression were implicated with the H 2 S phenotype of CECGM1 (H 2 S-free strain). MET1 may be a key gene in sulfide biosynthesis owing to its involvement in almost all strains. This study furthers the understanding of H 2 S formation in different S. cerevisiae strains and the industrial application of natural isolates. Highlights H 2 S synthesis in native S. cerevisiae strains was tested for industrial interest. H 2 S formation showed traits of strain-dependent and multi-gene participation. Synthesis of S-containing amino acid affected H 2 S formation in seven native strains. MET3 , MET5 and MET10 might account for H 2 S amount changes in two native strains.


  • 주제어

    RT-qPCR analysis .   Relative gene expression .   Sulfur-containing amino acid.  

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