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…

INTEGRAPE guidelines and tools: an effort of COST Action CA17111

INTEGRAPE was a European interdisciplinary network for “data integration to maximize the power of omics for grapevine improvement” (CA17111, https://integrape.eu/), funded by the European COST Association from September 2018 to 2022. This Action successfully developed guidelines and tools for data management and promoted the best practices in grapevine omics studies with a holistic future vision of: “Imagine having all data on grapevine accessible in a single place”.

The exploitation of Croatian grapevine genetic resources for the breeding of new resistant cultivars 

Croatian viticulture is mainly based on native grapevine varieties susceptible to various diseases and pests, which leads to unsustainable use of large amounts of pesticides. The sustainable development of viticulture in the future will only be possible by increasing the resistance of the grapevine through the development of new resistant varieties. Breeding programs have been launched in the leading wine-growing countries to develop resistant varieties possessing high-quality levels. Native cultivars from Croatia are not included in the breeding programs of other countries.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

Stomatal abundance in grapevine: developmental genes, genotypic variation, and physiology

Grapevine cultivation is threatened by the global warming, which combines high temperatures and reduced rainfall, impacting in wine quality and even plant survival. Breeding for varieties resilient to these challenges must address plant traits such as tolerance to supraoptimal temperatures and optimized water use efficiency while minimizing productivity and quality losses. Stomatal abundance (SA) determines the maximum leaf potential for transpiration and thus water loss and cooling. Since SA results from a developmental process during leaf emergence and growth, knowledge on the genetic control of this process would provide specific targets for modification.

Effects of long-term drought stress on soil microbial communities from a Syrah cultivar vineyard

Changes in the rainfall and temperature patterns affect the increase of drought periods becoming one of the major constraints to assure agricultural and crop resilience in the Mediterranean regions. Beside the adaptation of agricultural practices, also the microbial compartment associated to plants should be considered in the crop management. It is known that the microbial community change according to several factors such as soil composition, agricultural management system, plant variety and rootstock.