Dipartimento di Protezione e Valorizzazione Agroalimentare, Sezione di Chimica e Tecnologia degli Alimenti, Università di Bologna, Via S. Giacomo 7, 40126 Bologna, and Dipartimento di Scienze degli Alimenti, Università di Udine, 33100 Udine, Italy.
Appl Environ Microbiol. 1993 Jun;59(6):1838-41. doi: 10.1128/aem.59.6.1838-1841.1993.
Gas chromatographic analysis by direct injection of samples yielded quantitative data on acetoin content. Ninety-six strains of Hanseniaspora guilliermondii and Kloeckera apiculata were investigated for the ability to produce acetoin in synthetic medium and in must. High-level production of acetoin was found to be a characteristic of both species. In synthetic medium, the two species were not significantly different with respect to sugar utilization and ethanol or acetoin production. In grape must, the two species were significantly different (P = 0.001) in acetoin production and K. apiculata exhibited a significantly negative correlation between acetoin production and either sugar consumption or ethanol production. Use of selected apiculate yeasts in mixed cultures with Saccharomyces cerevisiae seems promising for optimization of wine bouquet.
直接注入样品的气相色谱分析提供了关于乙酰基含量的定量数据。对 96 株汉逊德巴利酵母和尖端克鲁维酵母进行了研究,以考察它们在合成培养基和葡萄汁中产生乙酰基的能力。结果发现,这两个物种都具有高水平的乙酰基生产能力。在合成培养基中,这两个物种在糖利用以及乙醇或乙酰基生产方面没有显著差异。在葡萄汁中,这两个物种在乙酰基生产方面存在显著差异(P = 0.001),并且尖端克鲁维酵母的乙酰基生产与糖消耗或乙醇生产之间呈显著负相关。在混合培养中使用选定的尖端酵母与酿酒酵母一起使用,似乎有望优化葡萄酒的香气。