| Title: | The impact of indigenous Saccharomyces cerevisiae and Schizosaccharomyces japonicus on typicality of crystal grape (Niagara) wine |
| Author(s): | Wang C; Liang S; Yang J; Wu C; Qiu S; |
| Address: | "Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Guiyang 550025, China. Gongqing Institute of Science and Technology, Jiangxi 332020, China. Kweichow Maotai Distillery (Group), Xijiu Co. Ltd, Zunyi 564600, China. Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Guiyang 550025, China. Electronic address: syqiu@gzu.edu.cn" |
| DOI: | 10.1016/j.foodres.2022.111580 |
| ISSN/ISBN: | 1873-7145 (Electronic) 0963-9969 (Linking) |
| Abstract: | "Schizosaccharomyces japonicus have been found as dominant yeast species coexisting with Saccharomyces cerevisiae during late stages of spontaneous fermentation of local grapes in Guizhou, China. Therefore, this study further investigated the impacts of the two indigenous yeast species on typicality of crystal grape (Niagara) wine. Five indigenous and one commercial S. cerevisiae strains were firstly selected based on their genotypes and fermentation traits in synthetic medium. All the six S. cerevisiae exhibited high tolerance to glucose, temperature, and SO(2). The two killer active strains FBKL2.996 and FBKL2.9126 showed relative higher tolerance capacity of ethanol, pH and osmotic pressure than the other four S. cerevisiae strains. Further pure fermentation of six strains using crystal grape must exhibited different contents of volatile compounds, with commercial strain CECA producing the highest levels of acetate esters (phenethyl acetate), ethyl esters (ethyl caprylate, ethyl hexanoate), n-caprylic acid isobutyl ester, and terpenes (linalool) whereas being ranked the last in the sensory analysis. The co-inoculation of indigenous S. japonicus with each of the six S. cerevisiae strains increased the acetate esters (mainly isoamyl acetate) by 2-3 times in crystal grape wine. The indigenous S. cerevisiae FBKL2.9128 showed the most obvious variation of volatile compounds between pure and mixed fermentation, exhibiting the significant increase of isoamyl acetate, ethyl decanoate, ethyl caprylate, ethyl hexanoate, methyl decanoate, and dodecanal when co-inoculated with S. japonicus. Sugar addition in immature crystal grape juice increased the ethanol, glycerol, and some volatile compounds such as ethyl butyrate, but decreased the volatile compounds with floral and animal odors. The aroma sensory analysis confirmed the decrease of varietal aroma in wines with sugar addition when comparing with wines made from immature crystal grape. The results of this study provide basic information on the impact of indigenous S. cerevisaie and S. japonicus, and sugar addition on typicality of crystal grape wine, which would help to improve the wine flavor made from crystal grape in southwest China" |
| Keywords: | Acetates/analysis Esters/analysis Ethanol/analysis Saccharomyces cerevisiae Schizosaccharomyces Sugars/analysis *Vitis/chemistry *Wine/analysis Acetate esters Killer Maturity Sugar Tolerance Wine yeast; |
| Notes: | "MedlineWang, Chunxiao Liang, Shuying Yang, Jinxian Wu, Cheng Qiu, Shuyi eng Research Support, Non-U.S. Gov't Canada 2022/08/09 Food Res Int. 2022 Sep; 159:111580. doi: 10.1016/j.foodres.2022.111580. Epub 2022 Jun 27" |
