隆中对酒业不同颜色高温大曲风味品质和细菌多样性研究
Study on the flavor quality and bacterial diversity of high-temperature Daqu with different colors produced by Longzhongdui winery
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						    摘要: 采用电子传感技术和MiSeq高通量测序技术,对隆中对酒业生产的黑色高温大曲(黑曲)、白色高温大曲(白曲)和黄色高温大曲(黄曲)的风味品质和细菌多样性进行研究。结果表明:在风味方面,白曲中芳香类、烷烃类和脂类物质的含量相对丰富,黑曲中硫化物、醇类和醛酮类的含量相对丰富,黄曲中各香气成分的含量介于黑曲和白曲之间。在滋味方面,黑曲的滋味特征相对独特,其在酸味、苦味、涩味、丰度(鲜的回味)、后味A(涩的回味)和后味B(苦的回味)指标上均显著优于白曲和黄曲(P<0.05)。在微生物构成方面,3种颜色高温大曲的细菌多样性差异不显著,但白曲中的细菌丰富度显著高于黑曲(P<0.05);优势细菌属主要由糖多孢菌属(Saccharopolyspora,28.95%)、高温放线菌属(Thermoactinomyces,21.07%)、克罗彭斯特德菌属(Kroppenstedtia,10.06%)、芽孢杆菌属(Bacillus,8.94%)等组成。3种颜色高温大曲的菌群群落结构与其风味品质之间存在显著相关关系,其中克罗彭斯特德菌属均与W1C(对芳香烃化合物灵敏)和W3C(对氨类和芳香成分灵敏)的响应值之间呈显著正相关关系(P<0.05);高温放线菌属和魏斯氏菌属(Weissella)与鲜味指标之间均呈显著正相关关系,而与酸味、涩味、后味A和后味B指标之间均呈显著负相关关系(P<0.05)。- 
										关键词:
										
- 高温大曲 /
- 风味品质 /
- 细菌多样性 /
- 电子传感技术 /
- MiSeq高通量测序
 Abstract: Electronic sensing technology and MiSeq high-throughput sequencing technology were used to study the flavor quality and bacterial diversity of black high-temperature Daqu (black-HTD), white high-temperature Daqu (white-HTD), and yellow high-temperature Daqu (yellow-HTD) produced by Longzhongdui winery. The results showed that in terms of flavor, white-HTD had relatively high contents of aromatic compounds, alkanes, and lipids, black-HTD had relatively high contents of sulfur compounds, alcohols, aldehydes, and ketones, and the contents of aroma components in yellow-HTD were between those of black-HTD and white-HTD. In terms of taste, black-HTD had relatively unique taste characteristics and was significantly better than white-HTD and yellow-HTD in terms of acidity, bitterness, astringency, richness (umami aftertaste), aftertaste A (astringent aftertaste), and aftertaste B (bitter aftertaste) (P< 0.05). In terms of microbial composition, there were no significant differences in bacterial diversity. However, the bacterial richness in white-HTD was significantly higher than that in black-HTD (P< 0.05). The dominant bacterial genera in the three types of high-temperature Daqu mainly included Saccharopolyspora (28.95%), Thermoactinomyces (21.07%), Kroppenstedtia (10.06%), and Bacillus (8.94%). There was a significant correlation between the microbial community structure and flavor quality of the three types of high-temperature Daqu. Specifically, Kroppenstedtia showed a significant positive correlation with the response values of W1C (sensitive to aromatic hydrocarbon compounds) and W3C (sensitive to ammonia and aromatic components) (P< 0.05). Thermoactinomyces and Weissella showed significant positive correlations with umami indicators but significant negative correlations with sourness, astringency, aftertaste A, and aftertaste B (P< 0.05).
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