Macrowine 2021
IVES 9 IVES Conference Series 9 Macrowine 9 Macrowine 2021 9 Grapevine diversity and viticultural practices for sustainable grape growing 9 Development of a new indicator of grape skin ripening in relation to Botrytis cinerea susceptibility

Development of a new indicator of grape skin ripening in relation to Botrytis cinerea susceptibility

Abstract

The bunch rot induced by Botrytis cinerea is an important disease of grapevine that causes a diminution of grape quality and a considerable yield loss leading to an economic loss. Currently, the most common methods to control this rot are canopy management and the use of fungicides, which has harmful effect on the environment and human health .The main grape barrier against pathogen remains grape skin, the resistance includes many factors which can be physical, biochemical or anatomical. Therefore, a new indicator based on these parameters of grape skin needs to be developed to evaluate the rot sensitivity and reduce the use of fungicides in vineyards. During ripening, B. cinerea sensitivity increases due to a loss of skin elasticity and an increase of grape skin porosity. These modifications are the result of different enzymatic activities (pectin methyl esterase (PME), polygalacturonase (PG), xyloglucan endotransglucosylase (XET)) that degrade the skin parietal polysaccharides. A combined physical and biochemical approach was developed to evaluate the Botrytis cinerea susceptibility of three Champagne varieties: Vitis vinifera cv. Pinot noir, Meunier and Chardonnay. Our results show that the skin ripening process differs between varieties and that our indicators (skin thickness, water availability, activity and gene expression of PME, PG and XET) can be used to describe the evolution of skin ripening profile for each cultivar and to explain the different susceptibility between three cultivars.

DOI:

Publication date: September 2, 2021

Issue: Macrowine 2021

Type: Article

Authors

Marie Andre

Unité de Recherche Œnologie, EA 457n USC 1366 INRAE, Université de Bordeaux, ISVV, 33882, Villenave d’Ornon, France MHCS, Epernay, France,Audrey BARSACQ, Unité de Recherche Œnologie, EA 457n USC 1366 INRAE, Université de Bordeaux, ISVV, 33882, Villenave d’Ornon, France Baptiste VAN GYSEL, MHCS, Epernay, France Diane COUROT, MHCS, Epernay, France Laurence MERCIER, MHCS, Epernay, France Laurence GENY-DENIS, Unité de Recherche Œnologie, EA 457n USC 1366 INRAE, Université de Bordeaux, ISVV, 33882, Villenave d’Ornon, France

Contact the author

Keywords

grape skin, Botrytis cinerea, thickness, champagne

Citation

Related articles…

Origin of unpleasant smelling sulphur compounds during wine fermentation

The wine sector is undergoing considerable transformation, particularly as a result of climate change and increasing consumer expectations for quality products, in a globalised and increasingly competitive market.

Methodological advances in relating deep root activity to whole vine physiology

Full understanding of grapevine responses to variable soil resources requires
assessing the grapevine root system. Grapevine root systems are expansive and examining deep roots (i.e., >40 cm)
is particularly important in conditions where grapevines increase reliance on deep soil resources, such as drought
or plant competition. Traditional methods of assessing roots rely on morphological traits associated specific
functions (e.g., root color, diameter, length), while recent methodological advances allow for estimating root
function more directly (e.g., omics). Yet, the potential of applying refined methods remains underexplored for roots
at deep depths.

Aromatic profile of six different clones of Chardonnay grape berries in Minas Gerais (Brazil)

Aromas are one of the key points in food analysis since they are related to character, quality and consequently consumer acceptance. It is not different in the winery industry, where the aromatic profile is a combination of viticultural and oenological practices. Based on the development of more aromatic clones and on the potential to produce sparkling wines at Caldas, in the southern region of Minas Gerais (Brazil) (21°55´S and 46°23´W, altitude 1,100m), the aim of this work was the determination of volatile compounds in six different clones of Chardonnay grape berries to better understand which compounds add bouquet to the wine, and additionally comprehend the impacts of the edaphoclimatic and annual conditions on the improvement of grape-growing and winemaking practices.

Electromagnetic conductivity mapping and harvest zoning: deciphering relationships between soil and wine quality

Using electromagnetic conductivity mapping and GIS technology, we identified two unique soil zones within a 0.8-hectare Cabernet Franc block in central Virginia, USA.

High-altitude vineyards under extreme conditions in the PIWI context of cultivation: economic and marketing evidence from an exploratory study in Northern Italy

Viticulture has spread to unexpected locations, such as high-altitude terrain. Among these, high-altitude viticulture has captured considerable attention, not only for the uniqueness of its products and landscapes but also because it offers an effective response to climate changes
The aim of this study is to analyse and compare wineries that used Piwi varieties (acronym for the German Pilzwiderstandfähig, i.e., cryptogame-resistant) at high altitudes (between 500 and 920 m a.s.l.) with the traditional non-mountainous viticulture model.