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…

Effect of ultraviolet B radiation on pathogenic molds of grapes

The fungicidal effect of UV-C radiation (100-280 nm wavelength) is well known, but its applicability for the control of pathogenic molds of grapes is conditioned by its effect on the host and by the risks inherent in its handling[1].
As an alternative, the effect in vitro of UV-B radiation (280-315 nm) on the main pathogenic molds of grapes has been studied: Botrytis cinerea, Aspergillus niger, Penicillium expansum and Rhizopus stolonifer.

“Compost Application in the Vineyard: Effects on Soil Nutrition and Compaction”

The mechanization of pruning and harvesting in vineyards has increased the risk of soil compaction. To reclaim soil properties or avoid this degradation process, it is crucial to properly manage the soil organic matter, and the application of compost derived from the vines themselves is a strategy to achieve this. The objective of this study was to evaluate the properties of soil treated with different doses of compost applied both on the vine row and the inter rows of a Vitis vinifera crop.

Effect of rising atmospheric CO2 levels on grapevine yield and composition by the middle of the 21st century: what can we learn from the VineyardFACE?

Atmospheric CO2 levels have been rising continuously since the industrial revolution, affecting crop physiology, yield and quality of harvest products, and grapevine is no exception [1]. Most of previously reported studies used potted plants in controlled environments, and explored grapevine response to relatively high CO2 levels, 700 ppm or more. The vineyardFACE, established in Geisenheim in 2012, uses a free air carbon dioxide enrichment (FACE) system to simulate a moderate (ambient +20%) increase in atmospheric CO2 in a vineyard planted with cvs. Cabernet-Sauvignon and Riesling grafted on rootstock 161-49 Couderc and SO4, respectively.

The use of δ13C as an indicator of water use efficiency for the selection of drought tolerant grapevine varieties

In the context of climate change with increasing evaporative demand, understanding the water use behavior of different grapevine cultivars is of critical importance. Carbon isotope discrimination (δ13C) measurements in wine provide a precise and integrated assessment of the water status of the vines during the sugar accumulation period in grape berries. When collected over multiple vintages on different cultivars, δ13C measurements can also provide insights into the effects of genotype on water use efficiency.

Organic mulches slightly influence wine phenolic composition and sensorial properties

Grapevines have traditionally been grown in semi-arid areas, but viticulture is now compromised by climate change. Therefore, it is necessary to implement environmentally friendly viticulture practices to adapt grapevines to current climatic conditions. In this context, organic mulches offer many benefits, such as reduced soil erosion and increased organic matter, soil water content and crop productivity. However, these practices must not compromise grape and wine quality. Therefore, the objective of this study was to evaluate the effect on wine physicochemical and phenolic composition and sensorial properties of different soil management practices on the vine row. Over four years, five soil treatments were examined in two different vineyards.