terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Oenological compatibility of biocontrol yeasts applied to wine grapes 

Oenological compatibility of biocontrol yeasts applied to wine grapes 

Abstract

Antagonistic yeasts applied to wine grapes must be compatible with the thereafter winemaking process, avoiding competition with the fermentative Saccharomyces cerevisiae or affecting wine flavour. Therefore, fifteen epiphytic yeasts (6 Metschnikowia sp., 6 Hanseniaspora uvarum, 3 Starmerella bacillaris) previously selected for its biocontrol ability against Alternaria on wine grapes were evaluate for possible competition with S. cerevisiae by the Niche Overlap Index (NOI) employing YNB agar media with 10 mM of 17 different carbonate sources present in wine grapes (proline, asparagine, alanine, glutamic acid, tirosine, arginine, lisine, methionine, glicine, malic acid, tartaric acid, fructose, melibiose, raffinose, rhamnose, sucrose, glucose). Also, acetic acid production in YPD-calcium carbonate agar medium, H2S production in Biggy agar medium and the production of “Brett” character or other odour defects in pasteurized must with p-coumaric acid were evaluated. As result, all Metschnikowia sp. strains showed coexistence with S. cerevisiae because the NOI (number of common carbon sources used by the two microorganisms/number of carbon sources used only by the antagonist) was <0.9 (0.42). Meanwhile, all H. uvarum and S. bacillaris strains showed competition with S. cerevisiae (NOI=1) and between them (NOI=1). On the other hand, almost all H. uvarum(5 of 6) and all S. bacillaris strains produced acetic acid, whereas none of the Metschnikowia sp. showed acetic acid production. All the yeasts analysed produced H2S in Biggy agar medium. Nevertheless, the majority of them exhibited no defect or in certain cases a slight solvent or acetate odour (different from “Brett character”) in must. Therefore, among all the biocontrol yeasts evaluated, Metschinikowia sp. strains showed more compatibility features than the rest of the strains and its oenological behaviour should be further studied under vinification conditions.

Acknowledgements: Marie Sklodowska-Curie Research and Innovation Staff Exchange project (872394-vWISE-H2020-MSCA-RISE-2019) – European Comission.

DOI:

Publication date: October 10, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Luciana Paola Prendes1*, María Gabriela Merín 1, Claire Courtel2, Carina Morales3, Juliana Garau1, Vilma Inés Morata de Ambrosini 1

1ICAI (Instituto de Ciencias Aplicadas a la Industria, CONICET-Facultad de Ciencias Aplicadas, UNCuyo), Bernardo de Irigoyen 375, San Rafael (Mendoza), Argentina.
2Oniris (École nationale vétérinaire, agroalimentaire et de l’alimentation de Nantes-Atlantique), Rue de la Géraudière, CS 82225, 44322 Nantes, France.
3Facultad de Ciencias Aplicadas (UNCuyo), Bernardo de Irigoyen 375, San Rafael (Mendoza), Argentina.

Contact the author*

Keywords

biocontrol yeasts, NOI, detrimental oenological characters

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Green pruning of shoots to force new sprouting of buds, in fruit set and in pea size: vegetative, productive and maturation effects, in cv. Verdejo

The context of climate crisis leads to the acceleration of technological ripening of grapes, with unsuitable loss of acidity, so various vineyard management alternatives are being considered to delay the grape ripening. The delay of the vegetative cycle towards a period of milder temperatures affects ripening, but vine behavior can vary according to the area, conduction, watering, variety, etc. A work is proposed to know the response to the green pruning of shoots, executed in fruit set and in pea size, in cv. Verdejo.

The colour pattern of flower arrangements influence wine tasters’ sensory description

The arrangements of flowers and wine counterparts are inextricably linked. Whether a fundamental aspect of tablescaping or acolytes to broader entertainment rituals, they have an entangled history since ancient times. The aim of this contribution is to verify the influence of visually delicate and robust flower arrangements on individual description of wines. Changes in the sensory description of wines were investigated during subjects’ (thirty-two participants) exposure to three different conditions: the presence of delicate, robust, or totally absent flower arrangements.

Barrels ad-hoc: Spanish oak wood classification by NIRs 

The wooden barrel is a key factor in enology, since wine chemical composition and sensory properties changes significantly in contact with the barrel[1]. Today’s highly competitive market constantly demands new differentiated products and wineries search innovations continuously.
Wood selection is crucial: barrels stability to keep constant their contribution and the result on products, and additional and differentiated wood contributions to impact their new products. Oak wood selection has traditionally been carried out using parameters such as specie, location and grain, however, it goes one step further nowadays. Large cooperage work with non-destructive techniques that allow classifying oak wood quickly and easily according to their organoleptic contribution[2].

Metatranscriptomic analysis of “aszú” berries: the potential role of the most important species of the grape microbiota in the aroma of wines with noble rot

Botrytis cinerea has more than 1200 host plants and is one of the most important plant pathogens in viticulture. Under certain environmental conditions, it can lead to the development of a noble rot, which results in a specific metabolic profile, altering physical texture and chemical composition. The other microbes involved in this process and their functional genes are poorly characterised. We have generated metatranscriptomic [1,2] and DNA metabarcoding data from three months of the Furmint grape variety, representing the four phases of noble rot, from healthy berries to completely dried berries.

Chemical and microbiological evaluation of Ribeiro wines (NW Spain)

Wine produced under Designation of Origin (DOP) Ribeiro, the oldest DOP in Galicia (NW Spain), are elaborated using local grape cultivars, grown at the valleys of Miño, Avia and Arnoia rivers. The landscape formed by slopes and terraces and the peculiar climate of continental character, softened by the proximity of Atlantic Ocean, make it an area of excellent aptitude for vine cultivation. In addition, small-scale farming and the use of traditional techniques for vineyard management provide a great diversity to Ribeiro wines. This study presents the evaluation of red and white wines (bottled or bulk wines) from DOP Ribeiro, produced between years 2018-2022.