terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Detoxification capacities of heavy metals and pesticides by yeasts 

Detoxification capacities of heavy metals and pesticides by yeasts 

Abstract

Winegrowing is still characterized by the extensive use of chemical fertilizers and plant protection products, despite strong recommendations to limit these practices. A part of these xenobiotics and metals are then found in grape juice and wine, causing a major health concern, as well as negatively affecting the fermentation process. In recent years, there has been renewed interest in non-Saccharomyces yeasts. These species have a wide phenotypic diversity, which would be exploited to broaden the aromatic palette of wines. The potential of some of these species as a bio-protection agent, in pre-fermentation treatment, has also been established.

In addition to these characteristics, the heavy metal sorption capacities of these species are mentioned in the literature. Pre-fermentation treatment of the harvest with non-Saccharomyces (NS) yeasts therefore appears to be an alternative to the use of chemical inputs for the elimination of organic and inorganic xenobiotics from grape musts. However, our knowledge of the detoxification capacities of yeasts and their molecular and biochemical determinant is not yet sufficiently advanced to allow such methods to be developed and put into practice.  In this study, we investigated the detoxifying abilities of fourteen strains of Saccharomyces and non-Saccharomyces yeasts during the first stages of wine fermentation. Fermentations were conducted in synthetic must in the presence or absence of pesticides (mix of twenty pesticides commonly used in the vineyard) / metals (copper). The colorimetric determination of copper concentration throughout fermentation revealed that most Saccharomyces and non-Saccharomyces yeasts detoxify almost all copper in less than 48 hours. Regarding pesticides detoxification, quantified by GC-MS (Dubernet laboratory), a higher variability was observed, with a removal of 0% to 90% of the compound depending on the yeast strain and the pesticide. In conclusion, this study showed the great diversity of the capacity of yeasts to detoxify molecules used in vineyards to fight against diseases and/or parasites and the biotechnological potential that this represents.

DOI:

Publication date: October 3, 2023

Issue: ICGWS 2023

Type: Article

Authors

Tristan Jacqui1,2, Celine Raynal2, Amandine Deroite2, Vincent Bouazza3 , Carole Camarasa1

1SPO, INRAe, Institut Agro Montpellier, Montpellier, France
2LALLEMAND SAS, Blagnac, France
3Laboratoire Dubernet, Narbonne, France

Contact the author*

Keywords

non-Saccharomyces yeasts, wine quality, heavy metals, pesticides, detoxification

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Influence of different Lachancea thermotolerans strains in wine acidity

Wine acidity is a parameter of great importance that influences different quality factors of the product such as biological stability or organoleptic characteristics. In the current context of climate change, which gives rise to wines with higher levels of ethanol and lower acidity, the biological acidification with yeast species such as Lachancea thermotolerans could be a solution.
In this work, the effect of the inoculation of different L. thermotolerans on the acidity of wine was studied.

Read More

Unveiling a hidden link: does time hold the key to altered spectral signatures of grapevines under drought?

Remote sensing technology captures spectral data beyond the visible range, making it useful for monitoring plant stress. Vis-NIR (Visible-Near Infrared) spectroscopy (400-1000 nm) is commonly used to indirectly assess plant status during drought. One example is the widespread use of normalized difference vegetation index (NDVI) that is strongly linked to green biomass. However, a knowledge gap exists regarding the applicability of this method to all the drought conditions and if it is a direct correlation to the water status of the plant.

Read More

The characterization of Vitis vinifera L cv. Cabernet sauvignon: the contribution of Ecklonia maxima seaweed extract

Biostimulants and biofertilizers are considered environmentally friendly and cost-effective alternatives to synthetic fertilizers, plant growth regulators and crop improvement products. Broadly, plant biostimulants are expected to improve nutrient use efficiency, tolerance to abiotic stress, quality traits and availability of nutrients in the soil or rhizosphere. Currently, seaweed extracts account for more than 33% of the total plant biostimulant market. Within this category, Ascophyllum nodosum (AN), is the most widely studied and applied in biostimulant formulations.

Read More

Overall conceptual characterization of aged dry white wines using a mental descriptive questionnaire

The purpose of the present study was to understand the overall concept of an aged dry white wine using a descriptive mental questionnaire. A total of 680 worldwide participants, grouped according to their involvement in the wine business, replied to an online questionnaire to characterize the sensory analytical and synthetic descriptors of an aged dry white wine. The descriptors were selected using a Check-All-That-Apply (CATA) approach concerning wine colour, aroma, taste, mouthfeel, and global appreciation.

Read More

Vineyard management practices to reduce sugar content on ‘Monastrell’ grapes

Climate change is resulting in more dry and hot summers, accelerating grape ripening and increasing berry sugars concentration. This results in wines with a higher alcohol content, which has a negative impact on wine quality, as well as, on consumer health. Agronomic practices that minimize these effects on berry composition and, consequently, on wine quality must be defined. In this work, different management practices have been assessed on rainfed ‘Monastrell’ grapevines in Jumilla (Murcia, Spain) from 2021 to 2023 vintages. Mulching, shading, application of kaolin and different types of pruning were evaluated, among others field adaptation practices.

Read More