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Identifying the main drivers in microbial diversity for Cabernet-Sauvignon cultivar, from Europe to South Africa

AuthorsTronchoni, Jordi ; Setati, E.; Valdetara, F.; Fracassetti, D.; Maghranze, D.; Foschino, R.; Morales, Pilar ; González García, Ramón ; Vigentini, Ileana; Bauer, F.
Issue Date7-Nov-2018
CitationInternational Congress of Grapevine and Wine Sciences (2018)
AbstractWine consumers have a great acceptance for wines with autochthonous character. This autochthonous character has been linked to different parameters, from weather conditions to soil chemistry but also to grape microorganisms. In the case of this microbial terroir, the question of which are the main drivers defining it remains open. This work aims to assess yeast biodiversity and how it is associated with geography and cultivar. The mycobiome of grapes from different vineyards in four wine regions of Europe (Georgia, Italy and Spain) and South Africa was analyzed in local autochthonous wine cultivars compared to Cabernet-Sauvignon cultivars in the same regions. The work design allows us to differentiate three layers of microbial diversity drivers: wine region (Rioja, Tuscany, Kakheti, Stellenbosch), wineries, or local terroir (different cultivars sharing growth and climate conditions), and cultivar specific associated microbiota (Cabernet Sauvignon, Tempranillo, Sangiovese, Rkatsiteli, and Chenin Blanch). The use of a metagenomic approach allows us to provide a new perspective on the mycobiome of grapes. Preliminary results show that the country of origin was the main driver clustering the different samples, clearly separating South Africa form the European countries. Also, samples belonging to the Cabernet-Sauvignon cultivars were more similar to each other than samples belonging to different local cultivars, thus suggesting a varietal microbial signature.
DescriptionTrabajo presentado en el International Congress of Grapevine and Wine Sciences, celebrado en Logroño (España), del 7 al 9 de noviembre de 2018
Appears in Collections:(ICVV) Comunicaciones congresos
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