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Published on: December 1, 2023
Diversity of yeast species during fermentative process contributing to Chinese Maotai-flavour liquor making
1State Key Laboratory of Food Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China.
Aims:
The famous traditional Chinese Maotai-flavour liquor is produced by a unique spontaneous simultaneous saccharification and fermentation process, which contributes to a distinctive yeast community with specific physiological properties and performances. Therefore, it would be useful to investigate this yeast community and reveal the novelty of its characteristics.
Methods And Results:
Nine yeast species were obtained from the fermentation period. A combination of physiological and functional analyses revealed a very high diversity of yeast populations. In particular, the extremely high temperature and low acidity of the fermentation conditions led to an accumulation of species with distinctive heat- and acid-resistant properties. Moreover, these yeast species were also significant flavour contributors, for various alcohols, acids and esters.
Conclusions:
The Chinese Maotai-flavour liquor-fermentation process is rich in yeast resources with distinctive fermentation properties, which were different from other beverages.
Significance And Impact Of The Study:
This work is the first to study the complex yeast ecology of the Maotai-flavour liquor-making process. It allows a deeper insight into the mechanism of this process.
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