terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 Comparison of the skin resistance of several grape varieties in relation to their physico-chemical properties

Comparison of the skin resistance of several grape varieties in relation to their physico-chemical properties

Abstract

Context and purpose of the study – The purpose of this study is to compare the skin resistance (SR) of the grapes with physico-chemical propertiess using a stong dataset and multidimentional statistical analysis .

A recent study has shown the role skin resistance plays against pest invasion but skin resistance could be a useful agronomic parameter, for example in the choice of the type of winemaking, by influencing the quantity of juice during crushing and maceration.

Material and methods – In this study we have used a hundred samples belonging to different vineyards of south of France (Aude) totaling twelve different grape varieties: Cinsault, Petite Arvine, Bourboulenc, Syrah, Carignan,  Viognier, Cabernet Franc, Mauzac, Mourvedre , Merlot, Grenache N and  Marselan.  Each sample consists of fifty berries. For each berry of a sample, a skin resistance test was carried out (Penelaup Robot). For each sample twenty four physico-chimical variables were measured with traditional methods (Dubernet Laboratories):  citric acid, gluconic acid, malic acid, tartric acid,   total acidity, volatile acidity IRTF, amino nitrogen ,  ammoniacal nitrogen IRTF, assimilable nitrogen IRTF, calcium, copper, delta C13 IRTF, iron, glucose + fructose IRTF, glycerol IRTF, magnesium, manganese, volumic mass IRTF, phosphorus, potassium, sodium, % Vol IRTF, zinc and pH IRTF.

Results – Thanks to our strong dataset, the results of this work demonstrate firstly a significant difference of the skin resistance depending on the grape variety and secondly that the skin resistance is a single parameter which cannot be directly explained by other physico-chemical variables.

We plan to complement the dataset with sensory analysis of the corresponding wines for each sample.

DOI:

Publication date: July 7, 2023

Issue: GiESCO 2023

Type: Poster

Authors

Philippe ABBAL

Serisud Company, 4 boulevard des Sources 34980 Saint Clément de rivière  France

Contact the author*

Keywords

skin resistance, variety, chemical properties, Penelaup, Laboratoire Dubernet

Tags

GiESCO | GIESCO 2023 | IVES Conference Series

Citation

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.