IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Biochemical characterization of grape skin cell wall during ripening in relation to Botrytis cinerea susceptibility of two Champagne cultivars

Biochemical characterization of grape skin cell wall during ripening in relation to Botrytis cinerea susceptibility of two Champagne cultivars

Abstract

Pectins or pectic polysaccharides are one of the major components in grape skin cell wall, they contribute to physiological processes which determine the integrity and rigidity of grape skin tissue. Their composition and organization in the cell wall matrix differ according cultivars and also play an important role in the defense mechanisms against plant pathogen and wounding. During grape ripening, important structural and biochemical changes are modifying the cell wall integrity due to pectolytic enzymes such as pectin methylesterases and polygalacturonases which participate to the cell wall weakening and increase the grape susceptibility to pathogens such as Botrytis cinerea.This work investigated the distribution of pectic polysaccharides in the cell wall according to their molecular weight and the localization of pectins (homogalacturonans) highly and low methyl-esterified in grape skin tissue throughout the berry development of the two main Champagne cultivars (Vitis vinifera cv. Pinot noir and Chardonnay), in relation with in vitro Botrytis cinerea susceptibility tests. The skin cell wall composition was evaluated by size exclusion chromatography (SEC) and the pectin localization by immunogold labelling.The comparative study between the two main grape cultivars from Champagne region highlights differences in pectin composition, Chardonnay skins are characterized by less pectic polysaccharides of high molecular weight (HMW) related to a lower susceptibility to Botrytis cinerea. The pectins cellular localization showed that pectins highly methyl-esterified are more important in Pinot noir cell walls than Chardonnay ones, suggesting different mechanisms of cell walls degradation between Chardonnay and Pinot noir skins.

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Andre Marie1, Lacampagne Soizic1, Barsacq Audrey1, Mercier Laurence2 and Gény-Denis Laurence1

1Unité mixte de recherche Œnologie, UMR 1366 Université de Bordeaux, INRAE, Bordeaux INP, ISVV MHCS, Epernay, 33882, Villenave d’Ornon, France
2MHCS, Epernay, France

Contact the author

Keywords

skin, ripening, pectins, SEC, Champagne

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Extraction of stilbenes from grape cane waste and their possible applications

Vine pruning residues constitute a significant fraction of vitivinicultural waste; in fact, depending on the variety and training system, they can reach 1-5 tons/ha/year.

Read More

The chances for using non-saccharomyces wine yeasts for a sustainable winemaking

Climate changes and the trend towards organic and more sustainable winemaking highlighted the need to use biological methodologies. The reduction in the use of SO2, the need of the reduction of ethanol content of wines and the now need to reduce or eliminate chemical phytosanitary products, have prompted the search for alternative practices.

Read More

Optimizing protocol for a rapid and cost effective DNA isolation for Marker Assisted Selection pipeline

Grapevine is a plant that holds significant socioeconomic importance due to its production of grapes for fresh consumption, wines, and juices. However, climate changes and susceptibility to diseases pose a threat to the quality and yield of these products. The breeding of new genotypes that are resistant/tolerant to biotic and abiotic stresses is essential to overcome the impact of climate changes. In this regard, Marker-assisted selection (MAS), which uses DNA markers, is a crucial tool in breeding programs. The efficiency and economy of this method depend on finding rapid DNA isolation methods.

Read More

Changes in white wine composition after treatment with cationic exchange resin: impact on wine oxidation after 8 years of bottle storage

Samples from 3 wine types were treated with a cationic exchange resin (7 lots) and stored for 8 years (47 samples). Forty-seven parameters were determined, including (1) important substrates with impact in white wine oxidation and (2) markers of oxidation. From group 1, sugars, elements, phenolic compounds, α-dicarbonyls and SO2 and from group 2, browning (A420), acetaldehyde, alkanals, furanic compounds were quantified.

Read More

Using nanopore skim-sequencing to characterise regional epigenetic variability in New Zealand Sauvignon Blanc

Recent advancements in genomic sequencing technologies have enabled more detailed and direct studies of DNA methylation, which can help characterise epigenetic variations in plants. The Grapevine Improvement team at the Bragato Research Institute is studying the use of Oxford Nanopore sequencing to identify epigenetic changes associated with environmental differences among clonally-propagated grapevines.

This study involved sequencing DNA from the same Sauvignon Blanc clone, sourced from diverse New Zealand viticultural regions, using the PromethION platform.

Read More