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耐低温桑葚果酒酵母的选育及发酵特性
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丁波(1984-),男,博士研究生,实验师,研究方向:食品发酵,E-mail:kelpbo@163.com 通讯作者:张文学(1963-),男,博士,教授,研究方向:食品发酵,E-mail:foodecoengineering@163.com

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四川省科技计划项目(2021YFN0012)


Isolation and Fermentation Properties of Yeast Strains for Low-temperature Resistant Mulberry Wines
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    摘要:

    为筛选适合桑葚低温酿造果酒的新型菌株,该研究从桑葚自然发酵液中分离、纯化菌种,以耐低温、产酒精能力为条件分级筛选性能优良的发酵菌株;并对所得菌株进行耐受性分析、以及果酒发酵性能和香气特征分析。研究获得产香性能优良的克鲁维毕赤酵母(Pichia kluyveri)2株(PK-1与PK-2),发酵性能优良的酿酒酵母(Saccharomyces cerevisiae)1株(SC-1)。研究结果表明,3株菌种在16 ℃下生长状况良好,乙醇、高糖及SO2耐受性分别达到15%(V/V)、400 g.L-1及300 mg.L-1,并且能够适应pH值低至3的果酒生产环境。发酵试验表明,SC-1组酒精度达到13.26% vol;挥发性香气成分共检测出53种,其中SC-1组发现24种、PK-1组32种、PK-2组31种;SC-1组异戊醇及苯乙醇(m/V)分别达到43.09 μg.mL-1和143.66 μg.mL-1;PK-1与PK-2组乙酸苯乙酯(m/V)分别达到402.96 μg.mL-1和421.51 μg.mL-1,特征香气成分差异显著。SC-1菌株低温条件下发酵性能优良,香气物质异戊醇含量突出,达到143.66 μg.mL-1;两PK菌株产酯性能优良,可为混菌发酵果酒构建全新的花果香型主体;所获菌株可为改进果酒香型提供一定的理论依据。

    Abstract:

    To screen novel yeast strains suitable for the low-temperature fermentation of mulberry fruit wine, this study isolated and purified strains from naturally fermented mulberry broth. Yeast strains with excellent low-temperature tolerance and alcohol-producing capacity were then hierarchically screened. The selected yeast strains were further analyzed for tolerance, and their fruit wine fermentation performance and aroma characteristics evaluated. Two Pichia kluyveri strains (PK-1 and PK-2) with excellent aroma producing ability and one Saccharomyces cerevisiae strain (SC-1) with superior fermentation performance were identified. Results showed that the three strains grew well at 16 ℃, exhibiting an ethanol tolerance and high sugar and sulfur dioxide production of 15% (v/v), 400 g.L−1, and 300 mg.L−1, respectively. All strains could also tolerate fruit wine production conditions at pH 3. Fermentation tests showed that the SC-1 group reached an alcohol content of 13.26% vol. A total of 53 volatile SPXaroma compounds were identified, of which 24 were found in the SC-1 group, 32 in the PK-1 group, and 31 in the PK-2 group. Isoamyl alcohol and phenylethanol concentrations (m/v) in the SC-1 group reached 43.09 μg.mL-1 and 143.66 μg.mL-1, respectively. Phenethyl acetate concentrations (m/v) in the PK-1 and PK-2 groups reached 402.96 μg.mL-1 and 421.51 μg.mL-1, respectively, showing significant differences in key aroma components. The SC-1 strains exhibited excellent fermentation performance under lowtemperature conditions, with a notably high isoamyl alcohol content (143.66 μg.mL-1). The two PK strains showed excellent esterproducing ability, which could contribute to the development a novel floral-fruity aroma profile for co-fermented fruit wines. Overall, the results of this study provide a theoretical basis for improving the aroma profile of fruit wine.

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丁波,林颖,熊灵,赵书田,张文学.耐低温桑葚果酒酵母的选育及发酵特性[J].现代食品科技,2026,42(3):83-92.

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  • 收稿日期:2024-11-26
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  • 在线发布日期: 2026-04-08
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