Silva-Sousa Flávia, Fernandes Ticiana, Pereira Fábio, Rodrigues Diana, Rito Teresa, Camarasa Carole, Franco-Duarte Ricardo, Sousa Maria João
CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, 4710-057 Braga, Portugal.
Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, 4710-057 Braga, Portugal.
J Fungi (Basel). 2022 May 26;8(6):569. doi: 10.3390/jof8060569.
Wine is a particularly complex beverage resulting from the combination of several factors, with yeasts being highlighted due to their fundamental role in its development. For many years, non- yeasts were believed to be sources of spoilage and contamination, but this idea was challenged, and many of these yeasts are starting to be explored for their beneficial input to wine character. Among this group, is gaining relevance within the wine industry, owing to its low volatile acidity production, increased release of aromatic compounds and enhanced color intensity. In addition, this yeast was also attracting interest in other biotechnological areas, such as bread and beer fermentation. In this work, a set of 40 strains, of varied geographical and technological origins, was gathered in order to characterize the phenotypic behavior of this species, focusing on different parameters of biotechnological interest. The fermentative performance of the strains was also evaluated through individual fermentations in synthetic grape must with the isolates' metabolic profile being assessed by HPLC. Data analysis revealed that growth is significantly affected by high temperature (37 °C) and ethanol concentrations (up to 18%), alongside 1.5 mM SO, showing variable fermentative power and yields. Our computation models suggest that the technological origin of the strains seems to prevail over the geographical origin as regards the influence on yeast properties. The inter-strain variability and profile of the products through the fermentative processes reinforce the potential of from a biotechnological point of view.
葡萄酒是一种特别复杂的饮品,由多种因素共同作用而成,其中酵母因其在葡萄酒酿造过程中的关键作用而备受关注。多年来,非酵母微生物一直被认为是葡萄酒变质和污染的源头,但这种观念受到了挑战,现在人们开始探索其中许多酵母对葡萄酒品质的有益影响。在这一类酵母中,[具体酵母名称未给出]在葡萄酒行业中越来越受到重视,因为它产生的挥发酸含量低,能增加芳香化合物的释放并增强颜色强度。此外,这种酵母在其他生物技术领域也引起了关注,比如面包和啤酒发酵。在这项研究中,收集了40株来自不同地理区域和具有不同工艺来源的[具体酵母名称未给出]菌株,以表征该菌种的表型行为,重点关注不同的生物技术相关参数。通过在合成葡萄汁中进行单独发酵来评估这些菌株的发酵性能,并通过高效液相色谱法评估分离株的代谢谱。数据分析表明,高温(37°C)、乙醇浓度(高达18%)以及1.5 mM的二氧化硫会显著影响[具体酵母名称未给出]的生长,其发酵能力和产量各不相同。我们的计算模型表明,就对酵母特性的影响而言,菌株的工艺来源似乎比地理来源更为重要。通过发酵过程中菌株间的变异性和产物谱从生物技术角度强化了[具体酵母名称未给出]的潜力。
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