储存期间Nongxiangxing daqu的微生物群落:微生物的继承,组装机制和代谢功能
Yiyang Zhou1, Yong Li2, Yi Dong2
1College of Biomass Science and Engineering, Sichuan University, Chengdu, China.
Journal of the science of food and agriculture
|January 17, 2025
概括
对Nongxiangxing daqu的最佳储存时间为3到4个月,增强关键的酶活性和风味特征. 这通过支持理想的微生物群落和发酵过程来改善酒造.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 发酵技术的发酵技术
背景情况:
- 翔酒的质量与其储存过程有关.
- 储存在制造过程中的具体作用尚不清楚,这种做法往往是基于传统的.
研究的目的:
- 调查储存时间对Nongxiangxing daqu的酶活性,微生物群落和风味特征的影响.
- 为了确定在baijiu生产中使用的daqu的最佳储存期.
主要方法:
- 分析不同储存时间的糖化,液化,发酵和化活动.
- 气色谱-质谱法 (GC-MS) 用于风味化合物分析.
- 16S rRNA和ITS测序用于微生物群落概况.
- 微生物群,味道和物理化学参数之间的相关性分析.
- 模拟的白发酵试验.
主要成果:
- 酵素活动在储存3~4个月后达到峰值.
- 和酒精被确定为主要的风味化合物,总共检测到87种.
- 韦塞拉主导细菌属 (增加丰富性),而热菌主导真菌 (减少丰富性).
- 细菌社区的组合是随机的;真菌的组合是决定性的.
- 糖化活性与特定的细菌和酵母相关; Ester 与某些细菌属相关.
- 预测的微生物功能包括碳水化合物降解,风味形成和乙醇发酵.
- 储存34个月的达库在模拟的baijiu发酵中产生了最佳结果.
结论:
- 储存时间通过改变酶活性,微生物组成和风味特征,显著影响了质.
- 34个月的储存期被确定为Nongxiangxing daqu的最佳储存期,用于酒.
- 这些发现为优化daqu生产和提高baijiu质量提供了科学基础.
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