Isolation of Aroma-Producing Wickerhamomyces anomalus Yeast and Analysis of Its Typical Flavoring Metabolites

被引:7
作者
Zhang, Jing [1 ]
He, Yiguo [1 ]
Yin, Liguo [2 ]
Hu, Rong [1 ]
Yang, Jiao [1 ]
Zhou, Jing [1 ]
Cheng, Tao [1 ]
Liu, Hongyu [1 ]
Zhao, Xingxiu [1 ]
机构
[1] Sichuan Univ Sci & Engn, Coll Bioengn, Yibin 644000, Peoples R China
[2] Yibin Univ, Solidstate Fermentat Resource Utilizat Key Lab Sic, Yibin 644000, Peoples R China
关键词
Sichuan paocai; mixed fermentation; SPME-GC-MS analysis; volatile flavor components; STARTER; DAQU; QUALITY; BREVIS;
D O I
10.3390/foods12152934
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
In this study, 21 strains of aroma-producing yeast were isolated from Sichuan paocai juice of farmers in western, eastern and southern Sichuan. One strain, Y3, with the best aroma-producing characteristics, was screened using an olfactory method and a total ester titration method, and was identified as Wickerhamomyces anomalus. The total ester content of Y3 fermentation broth was as high as 1.22 g/L, and there was no white colonies or film on the surface. Meanwhile, the Y3 strain could tolerate 14% salt concentration conditions and grow well in a pH range of 3-4. Through sensory analysis, the fermented mustard with a ratio of Lactiplantibacillus plantarum to Y3 of 1:1 showed the highest overall acceptability. Ethyl acetate with its fruit and wine flavor was also detected in the fermented Sichuan paocai juice with a mixed bacteria ratio of 1:1, analyzed with SPME-GC-MS technology, as well as phenylethyl alcohol, isobutyl alcohol, isothiocyanate eaters, myrcene and dimethyl disulfide. These contributed greatly to the unique flavor of Sichuan paocai. In general, Wickerhamomyces anomalus Y3 enhanced the aroma of the fermented Sichuan paocai.
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页数:15
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