研究报告

清香大曲中高产酯酵母菌的筛选及产香特性分析

  • 严雯雯 ,
  • 王爱元 ,
  • 朱君卓 ,
  • 廖蓓 ,
  • 常煦 ,
  • 王鸿彪 ,
  • 方尚玲
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  • 1(工业发酵省部共建协同创新中心,发酵工程教育部重点实验室,工业微生物湖北省重点实验室,湖北工业大学 生物工程与食品学院,湖北 武汉,430068)
    2(湖北安琪酵母股份有限公司,湖北 宜昌,443000)
    3(湖北苗仙聚生物科技有限公司,湖北 恩施土家族苗族自治州,445512)
第一作者:硕士研究生(方尚玲教授为通信作者,E-mail:1425176720@qq.com)

收稿日期: 2025-07-01

  修回日期: 2025-09-04

  网络出版日期: 2026-06-03

基金资助

中央引导地方科技发展资金项目(2024EIA019);2024年楚天英才计划-科技创新团队项目

Selection and aromatic production characteristics analysis of high ester-producing yeast from Qingxiang Daqu

  • YAN Wenwen ,
  • WANG Aiyuan ,
  • ZHU Junzhuo ,
  • LIAO Bei ,
  • CHANG Xu ,
  • WANG Hongbiao ,
  • FANG Shangling
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  • 1(Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei Key Laboratory of Industrial Microbiology, School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China)
    2(Hubei Angel Yeast Co.Ltd., Yichang 443000, China)
    3(Hubei Miaoxianju Biological Technology Co.Ltd., Enshi Tujia and Miao Autonomous Prefecture 445512, China)

Received date: 2025-07-01

  Revised date: 2025-09-04

  Online published: 2026-06-03

摘要

为丰富白酒的香气成分,该研究从清香型大曲中分离出酵母菌,通过总酯含量比较和挥发性物质半定量分析筛选出高产酯酵母菌,并进行分子生物学鉴定和耐受性能力测试。结果表明:从清香型大曲中共分离出10株酵母菌,筛选后得到2株高产酯(总酯含量3 800.80、3 292.31 mg/L)的产香酵母A-2、J-6,鉴定均为费比恩塞柏林德纳氏酵母(Cyberlindnera fabianii)。通过气相色谱-质谱联用技术进行香气化合物含量分析、挥发性成分差异分析及相关性分析,结果表明:A-2与J-6关键差异香气化合物共有5种,其中4种差异化合物香气活度值(odor activity value, OAV)均大于1,说明两者香气轮廓差异明显。J-6中OAV≥1 的物质共有7种,A-2中OAV≥1 的物质共有10种,主要香气贡献物质是辛酸乙酯、乙酸异戊酯、乙酸苯乙酯、己酸乙酯、乙酸乙酯和癸酸乙酯,呈现出较浓郁的花果香特征。A-2中关键香气化合物种类含量更丰富,酒体风味层次更复杂,故最终选取菌株A-2为高产酯功能菌。耐受性分析结果表明,菌株A-2可耐受38 ℃、pH 3.0、酒精度8%vol的生长环境。该研究从清香大曲中分离筛选出一株高产酯酵母菌株A-2作为产香功能菌,为定向改善白酒风味应用提供了一定的理论基础和实践指导。

本文引用格式

严雯雯 , 王爱元 , 朱君卓 , 廖蓓 , 常煦 , 王鸿彪 , 方尚玲 . 清香大曲中高产酯酵母菌的筛选及产香特性分析[J]. 食品与发酵工业, 2026 , 52(9) : 50 -59 . DOI: 10.13995/j.cnki.11-1802/ts.043757

Abstract

To enrich the aroma components of Baijiu, this study isolated yeast strains from light-aroma Daqu, screened high-ester-producing yeasts through comparison of total ester contents and semi-quantitative analysis of volatile substances, and conducted molecular biological identification and tolerance tests.Results show that a total of 10 yeast strains were isolated from light-aroma Daqu, and after screening, two aroma-producing yeasts (A-2 and J-6) with high ester production (total ester contents of 3 800.80 mg/L and 3 292.31 mg/L) were obtained.Both were identified as Cyberlindnera fabianii.Analysis of aroma compound contents, differences in volatile components, and correlation analysis using GC-MS show that there are 5 key differential aroma compounds between A-2 and J-6.Among these, 4 compounds have odor activity value(OAV)>1, indicating significant differences in their aroma profiles.J-6 contains 7 substances with OAV≥1, while A-2 contains 10 such substances.The main aroma-contributing compounds include ethyl octanoate, isoamyl acetate, phenethyl acetate, ethyl hexanoate, ethyl acetate, and ethyl decanoate, presenting a rich floral and fruity aroma.A-2 exhibits a more diverse range of key aroma compounds and a more complex flavor profile;thus, strain A-2 was finally selected as the high-ester-producing functional strain.Tolerance analysis indicates that strain A-2 can tolerate a growth environment of 38 ℃, pH 3.0, and 8%vol alcohol content.This study isolated and screened strain A-2, a high-ester-producing yeast from light-aroma Daqu, providing theoretical and practical guidance for targeted improvement of Baijiu flavor.

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