terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Conventional and alternative pest management strategies: a comparative proteomic study on musts

Conventional and alternative pest management strategies: a comparative proteomic study on musts

Abstract

In a context of sustainable agriculture, “agroecological immunity” is an emerging concept to reduce the use of chemical pesticides to protect crops against pathogens. This alternative strategy aims to combine different levers including the use of “bio”solutions. These include biocontrol products, some of which being plant defense elicitors, as well as products authorized in organic farming such as copper or sulfur. In vineyards, depending on climate conditions, powdery and downy mildews can be devastating diseases. So, to guarantee the yield and quality of the harvest, it is usually necessary to treat vines against these diseases from the 5/6-leaf stage to the bunch closure stage. In the present study carried out on a Chardonnay plot located at Lugny (Mâconnais Vineyard, France), we compared, the conventional vineyard protection strategy to the alternative one using “bio” solutions. The latter included the use of copper/sulfur and phosphonate or Bacillus-based products. For the two studied vintages (2020 and 2021), up to 8 treatments were applied whatever the protection strategy used. Besides the evaluation of the protection efficacy against downy and powdery mildews, we performed proteomic analyses (LC-MS/MS) to assess the impact of these two crop protection strategies on must quality. Among the 1041 proteins analyzed, 215 were significantly differentially expressed and the clustering analysis allowed to distinguish the two vintages rather than the protection management strategies. At last, a label-free quantification of proteins using spectral counting was performed from 2021 vintage and finally revealed that less than 2% of proteins were significantly differentially expressed between the two-pest management used.

Acknowledgements: We acknowledge F. Bidaut (Vinipôle Sud Bourgogne, Mâcon, France).

DOI:

Publication date: October 10, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Héloir M-C.1*Ϯ, Lemaitre-Guillier C.1 Ϯ, Schaeffer C.2, Strub J-M.2, Deulvot C.1, Adrian M.1

1Agroécologie, CNRS, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, Dijon, France.
2 Laboratoire de Spectrométrie de Masse Bio-Organique (LSMBO), IPHC, Univ. de Strasbourg, CNRS, Strasbourg, France.

Ϯ: co- first authors

Contact the author*

Keywords

biocontrol, grapevine protection, proteomic analysis, vineyard

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Addition of glutathione-rich inactivated yeasts to white musts: effects on wine composition and sensory quality

Glutathione plays a key role in preventing some oxidative processes during winemaking. This molecule limits the must enzymatic oxidation, reacts with caffeic acid and generates a colourless compound that prevents subsequent browning. It also has a protective effect on wine aroma, preventing the oxidation of the volatile compounds with a high sensory impact.

Read More

Ultra-High Pressure Homogenization (UHPH): a technique that allows the reduction of SO2 in winemaking

Ultra-High Pressure Homogenization (UHPH) is an innovative, efficient and non-thermal technology that can be applied at different stages in winemaking in order to reduce or avoid the use of sulphites. During 2022 vintage, a batch of Xarel·lo must was processed by UHPH at 300 MPa with an inlet temperature (Ti) of 4 ºC. In order to verify the influence of the UHPH treatment in wine characteristics, alcoholic fermentations with this must (UHPH) were carried out and compared with a control batch (without SO2 addition (C)) and a sulphited batch, in which 60 mg/L of total SO2 (SO2) were added.

Read More

Quantifying water use diversity across grapevine rootstock-scion combinations

Vines require proper light levels, temperature, and water availability, and climate change is modifying these factors, hampering yield and quality. Despite the large diversity of rootstocks, varieties, and clones, we still lack knowledge of their combined effects and potential role in a warmer and dryer future. Therefore, we aim to characterize some of the existing diversity of rootstocks and genotypes and their interaction at the eco-physiological level, combining stomatal conductance (gs) and chlorophyll a fluorescence analysis.

Read More

Characterization of spoilage yeasts from Malbec grapes from San Rafael wine region (Argentina)

The yeast ecosystem in grape musts is quite broad and depends on the region and the health of the grapes. Within this, there are yeasts that can generate fermentative deviations and/or cause defects in the wine. It is very important to address this issue because there are significant economic losses in the wine industry when the fermentation process and/or the organoleptic characteristics of the wine are negatively affected, even more today since climate change has a marked effect on the composition of this ecosystem. The aim of this work is to characterize the behavior regarding detrimental oenological features of potential spoilage yeasts isolated from viticultural environments.

Read More

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.

Read More