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…

«Nektar» -the new red variety wine grape aromatic high quality

The multi-annual study of the International Genetic Bank of the Grape Vine has shown that red varieties are enough, but the red varieties that produce high-quality red wine are minimal.

Read More

CONTRIBUTION OF VOLATILE THIOLS TO THE AROMA OF RIESLING WINES FROM THREE REGIONS IN GERMANY AND FRANCE (RHEINGAU, MOSEL, AND ALSACE)

Riesling wines are appreciated for their diverse aromas, ranging from the fruity fresh characters in young vintages to the fragrant empyreumatic notes developed with aging. Wine tasters often refer to Riesling wines as prime examples showcasing terroir, with their typical aroma profiles reflecting the geographical provenance of the wine. However, the molecular basis of the distinctive aromas of these varietal wines from major Riesling producing regions in Europe have not been fully elucidated. In this study, new lights were shed on the chemical characterization and the sensory contribution of volatile thiols to Riesling wines from Rheingau, Mosel, and Alsace. First, Riesling wines (n = 46) from the three regions were collected and assessed for their aroma typicality by an expert panel.

Read More

Regionality in Australian Pinot Noir wines: A study using NMR and ICP-MS with commercial wines

Aim: Wine quality and character are defined in part by the terroir in which the grapes are grown. Metabolomic techniques, such as nuclear magnetic resonance (NMR) spectroscopy and inductively coupled plasma mass spectrometry (ICP-MS), are used to characterise wines and to detect wine fraud in other countries but have not been extensively trialled in Australia. This study aimed to investigate the use of ICP-MS and NMR to characterise a selection of Pinot noir wines.

Read More

Alternative training system for cv ‘Erbaluce’: comparison between pergola and VSP system during 2006 and 2007 years

The ‘Erbaluce‘, a grapevine cultivar from which in the Canavese (Piedmont, Italy) different types of white DOC wines are obtained, is traditionally trained on a support structure commonly known as “pergola” having three to five long “cords” which consist of three cordons and canes interlaced together.

Read More

Cultivo de la Malvasia en Tenerife

El archipiélago Canario, conocido en el pasado como las Islas del Vino, fue una gran potencia en la elaboración y comercialización del vino, sobre todo de caldos elaborados con la variedad Malvasía.

Read More