WAC 2022 banner
IVES 9 IVES Conference Series 9 WAC 9 WAC 2022 9 4 - WAC - Oral presentations 9 Red wines from southwest France, Lebanon and South Korea: study of phenolic composition and antioxidant and biological activities according to grape varieties and winemaking processes

Red wines from southwest France, Lebanon and South Korea: study of phenolic composition and antioxidant and biological activities according to grape varieties and winemaking processes

Abstract

The phenolic compounds present in the wine are responsible for reducing the risk of developing chronic diseases (cardiovascular, cancer, diabetes, Alzheimer …) because of their antioxidant activities and the presence of nutraceutical molecules with targeted biological activities. Polyphenols not only contribute to the “French paradox” but also contribute to give the wine its color, structure, aroma and allow a long-term preservation.

The objective of this work is to study the antioxidant and biological activities (anti-inflammatory, anticancer, anti-Alzeimer in vitro …) of wine extracts, as well as the concentration of polyphenols, anthocyanins, flavonoids , and nutraceuticals (resveratrol , quercetin, caffeic acid.) depending on the grape varieties and winemaking processes.

The grape varieties used are Cabernet Sauvignon, Cot, Duras, Fer Servadou, Gamay, Négrette, Prunelard, Tannat (French SO wines), Syrah and Cabernet Sauvignon (Lebanese wines), Cambell’s early (vitis labrusca, Korean wines).

At the level of the winemaking processes, the influence of the following parameters was studied:
– alcoholic fermentation with punching
– cold or hot maceration, before or after AF
– addition of tannins, enzymes
– addition of collages agents

Sensory analyzes were carried on to compare wines obtained with different grape varieties and (or) vinification processes.

Trends research to determine the best activities / phenolic composition / nutraceutical correlations and grape varieties or processes was performed by principal component analysis.

DOI:

Publication date: June 14, 2022

Issue: WAC 2022

Type: Article

Authors

Jean-Pierre Souchard, Jalloul Bouajila

Presenting author

Jean-Pierre Souchard – Laboratoire de Génie chimique, UMR CNRS 5503, DNO-Toulouse

Laboratoire de Génie chimique, UMR CNRS 5503, DNO-Toulouse 

Contact the author

Keywords

phenolic composition, biological activities, grapes varities, winemaking processes, French Korean Libanese wines

Tags

IVES Conference Series | WAC 2022

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.