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首页> 外文期刊>World Journal of Microbiology & Biotechnology >Genetic variability and physiological traits of Saccharomyces cerevisiae strains isolated from 'Vale dos Vinhedos' vineyards reflect agricultural practices and history of this Brazilian wet subtropical area
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Genetic variability and physiological traits of Saccharomyces cerevisiae strains isolated from 'Vale dos Vinhedos' vineyards reflect agricultural practices and history of this Brazilian wet subtropical area

机译：“Vale DoS Vinhedos”葡萄园分离的酿酒酵母菌菌株的遗传变异性和生理性状，反映了这座巴西湿亚热带区域的农业实践和历史

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摘要

Vale dos Vinhedos appellation of origin has a very recent history as industrial wine making region. In this study we investigated the genetic and phenotypic variability of Saccharomyces cerevisiae strains isolated from South-Brazilian vineyards in order to evaluate strain fermentation aptitude and copper and sulphites tolerance. Merlot grape bunches were collected from three vineyards and yeast isolation was performed after single bunch fermentation. High genotypic variability was found and most of the genotypes revealed to be vine-specific. No industrial strain dissemination was present in the sampled vineyards, although it has been wildly reported in traditional winemaking countries. From the phenotypic traits analysis these Brazilian native strains showed good fermentation performances, good tolerance to sulphites and, in particular, a high copper tolerance level. Copper is the most important metal in the formulation of fungicides against downy mildew (Plasmopara viticola), one of the most harmful disease of the vines, and other fungal pests. The high tolerance to copper suggests an environmental adaptation to the strong use of copper-based fungicides, requested by the wet subtropical climate.
机译：Vale DoS Vinhedos的起源称为最近的历史，作为工业葡萄酒制造地区。在这项研究中，我们研究了从南巴西亚葡萄园中分离的酿酒酵母菌菌株的遗传和表型变异性，以评估应变发酵能力和铜和硫酸盐耐受性。从三个葡萄园收集梅洛葡萄束，在单一束发酵后进行酵母分离。发现高基因型变异性，并且大多数基因型都显示为葡萄含量。除了在传统的葡萄酒酿造国家中普遍报道，在采样的葡萄园中没有产业应变传播。从表型特性分析中，这些巴西本地菌株显示出良好的发酵性能，对硫酸盐的良好耐受性，特别是高铜耐耐受性。铜是杀菌剂配方中最重要的金属，反对柔软的霉菌（Plasmopara viticola），葡萄藤最有害的疾病之一，以及其他真菌害虫。对铜的高耐受性表明，对湿亚热带气候的要求，对铜基杀菌剂的强大使用进行了环境的适应性。

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