terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Can yeast cells sense other yeasts beyond competition interactions?

Can yeast cells sense other yeasts beyond competition interactions?

Abstract

The utilization of non-Saccharomyces yeasts in the wine industry has increased significantly in recent years. Alternative species need commonly be employed in combination with Saccharomyces cerevisiae to avoid stuck fermentation, or microbial spoilage. The employment of more than one yeast starter can lead to interactions between different species with an impact on the outcome of wine fermentation. Previous studies[1] demonstrated that S. cerevisiae elicits transcriptional responses with both shared and species-specific features in co-culture with other yeast species. We tested the hypothesis that extracellular vesicles (EVs) play a role as mediators in these interactions. For this purpose, we exposed S. cerevisiae cultures to EVs from Metschnikowia pulcherrima. Through RNAseq, we evaluated the impact of these EVs on the physiology of S. cerevisiae, comparing the results with the response of S. cerevisiae to metabolically active M. pulcherrima cells under identical conditions. The analysis revealed a significant overlap in the transcriptional responses induced in S. cerevisiae by both M. pulcherrima cells and EVs. Notably, both stimuli upregulated the genes related to glycolysis and ribosomal activity, while repressing autophagic genes. These findings provide evidence that S. cerevisiae actively responds to competing species under conditions resembling those found in winemaking. Furthermore, it offers experimental support for the hypothesis that EVs take part in interspecies recognition.

Acknowledgements: This work was funded by the Spanish Government through grant PID2019-105159RB-I00 funded by MCIN/AEI/10.13039/501100011033, grant BES-2016-077557, and grant PRE2020-093420 funded by MCIN/AEI/10.13039/501100011033 and by “ESF Investing in your future” (training contracts for AM and MM).

References:

1)  Curiel, J.A., Morales, P., Gonzalez, R., Tronchoni, J., 2017. Different non-Saccharomyces yeast species stimulate nutrient consumption in S. cerevisiae mixed cultures. Front. Microbiol. 8, 2121. https://doi.org/10.3389/fmicb.2017.02121.

DOI:

Publication date: October 3, 2023

Issue: ICGWS 2023

Type: Article

Authors

Miguel Mejías Ortiz1*, Ana Mencher1, Jordi Tronchoni2, Ramon Gonzalez1, Pilar Morales1

1Instituto de Ciencias de la Vid y del Vino (CSIC, Gobierno de la Rioja, Universidad de La Rioja), Logroño, La Rioja, Spain
2Universidad Internacional de Valencia, Valencia, Spain

Contact the author*

Keywords

extracellular vesicles, yeast interactions, transcriptomics, winemaking

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Optimization of the ripening time of new varieties descendants of Monastrell

Given the impact of climate change on viticulture in the Region of Murcia, this paper attempts to expose the possibility of using genetic improvement as a dilemma that allows access to new descendant varieties of the autochthonous variety Monastrell crossed with varieties such as Syrah and Cabernet. Sauvignon, thus obtaining hybrids (Gebas and Myrtia). In it, the chromatic parameters and the phenolic profile of the new varieties will be compared with those obtained by the Monastrell variety at two moments during maturation (12 and 14 º Baumé), to check if the results would allow earlier harvests in these new varieties thus avoiding the decoupling between phenolic and technological maturity, while improving the quality of grapes and wines.

Indicators of Sustainable Vineyard Soil Management: Metrics for Assessing Environmental Impacts

The vital role of soils in supporting life on our planet cannot be overstated. Soils provide numerous ecosystem services and functions, including biomass production, carbon sequestration, physical support, biological habitat, and genetic reserve, among others. Understanding the characteristics and sensitivity of soils in a specific terroir, along with effective soil management practices, is crucial for the sustainable management of natural resources.

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. In each condition, the same two wines were blind tasted: a wine previously defined as delicate – a Pinot Noir from Australia, and a wine known for its robust character – a Tannat from Uruguay.

Dynamics of Saccharomyces cerevisiae population in spontaneous fermentations from Granxa D’Outeiro terroir (DOP Ribeiro, NW Spain)

Granxa D’Outeiro is a recovered ancient vineyard located in the heart of DOP Ribeiro, where traditional white grapevine varieties are growing under sustainable management. Spontaneous fermentations using grape must from Treixadura, Albariño, Lado, Godello, and Loureira varieties were carried out at experimental winery of Evega. Yeasts were isolated from must and at different stages of fermentation. Those colonies belonging to Saccharomyces cerevisiae were characterized at strain level by mDNA-RFLPs.

New crossbreed winegrape genotypes cultivated under rainfed conditions in a semi-arid Mediterranean region

Traditional drought tolerant varieties such as Cabernet Sauvignon, Monastrell, and Syrah [1], have been used as parents in the grapevine breeding program initiated by the Instituto Murciano de Investigación y Desarrollo Agrario y Medioambiental (IMIDA) in 1997 [2]. This work presents the results of evaluating three new genotypes obtained from crosses between ‘Monastrell’ and ‘Cabernet Sauvignon’ (MC16 and MC80) and between ‘Monastrell’ and ‘Syrah’ (MS104), comparing their performance under conditions of water scarcity and high temperatures with that of their respective parental varieties. For this purpose, the six genotypes were cultivated under controlled irrigation conditions (60% ETc) and rainfed conditions.