Terroir 2008 banner
IVES 9 IVES Conference Series 9 Impact of water stress on the phenolic composition of cv. Merlot grapes, in a typical terroir of the La Mancha region (Spain)

Impact of water stress on the phenolic composition of cv. Merlot grapes, in a typical terroir of the La Mancha region (Spain)

Abstract

The study was carried out in 2006 with Merlot grapes from vines grown using the trellis system, where four treatments were compared with different levels of water stress. These levels were established using irrigation to maintain pre-dawn leaf water potential (ΨPD) values between two different phenological intervals: flowering-veraison and veraison-maturity. Leaf area index (LAI), exposed leaf area (SA) and production were also measured. Conventional grape parameters (weight, ºBaumé, pH and malic acid) and seed and skin phenolic compounds (anthocyanins, procyanidins, tannins and total polyphenols) were also analyzed. The results showed that when grape weight diminished as a result of water stress, the percentage weight of grape skins with respect to total grape weight was maintained, but seed weight increased. When the water stress integral increased, total polyphenol, procyanidin and tannin concentrations in the seeds also increased.

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article

Authors

Juan Luis CHACÓN VOZMEDIANO, Esteban GARCÍA ROMERO, Jesús MARTÍNEZ GASCUEÑA, Raquel ROMERO PECES and Sergio GÓMEZ ALONSO

Servicio de Investigación y Tecnología. Instituto de la Vid y del Vino de Castilla-La Mancha
(IVICAM). Carretera de Albacete, s/n. 13700 Tomelloso, Spain

Contact the author

Keywords

grape, Merlot, phenolic compounds, water stress

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Crossed approaches to experimental economics and sensory analysis regarding noble rot sweet wines perception

Noble rot sweet wines are reputed wines, traditionally elaborated according to a singular vinification process involving the harvesting of overripe grapes under the action of the ascomycete fungus Botrytis cinerea.

Influence of light exclusion on anthocyanin composition in ‘Cabernet sauvignon’

The aim of this study was to determine how artificial shading influenced berry development and anthocyanin accumulation in ‘Cabernet sauvignon’. Opaque polypropylene boxes were applied to grape bunches over three different developmental stages.

Breeding grapevines for disease and low temperature tolerance: the U.S. perspective

Most grape scion cultivars grown around the world are derived from a single species, Vitis vinifera. Yet, the proportion of interspecific hybrids is increasing for a variety of reasons, including resistance to abiotic stresses such as low temperatures; societal, economic and environmental pressures to reduce pesticide usage; and to add a greater range of flavors to new table grape cultivars.

Relation entre les caractéristiques des fromages d’Appellation d’Origine Contrôlée et les facteurs de production du lait

Les fromages d’Appellation d’Origine Contrôlée (AOC) représentent un enjeu économique important pour la filière laitière (11 % des fromages produits en France sont des fromages d’AOC, et dans certaines régions de montagne, cette proportion dépasse 50 %). Les spécificités de ces fromages et leurs liaisons avec les caractéristiques du terroir constituent un système complexe où interagissent en particulier la technologie fromagère et les caractéristiques des laits (composition chimique en particulier). Ces dernières dépendent elles-mêmes des caractéristiques des animaux (origine génétique, facteurs physiologiques, état sanitaire) et de leur mode de conduite (alimentation, hygiène, traite…) (fig. 1). L’influence de ces facteurs de production (alimentation et type d’animal en particulier) sur les caractéristiques des fromages est fréquemment mise en avant par les fromagers, sur la base d’observations empiriques. Il existe cependant très peu de travaux expérimentaux sur le sujet, en raison, entre autres, de la difficulté de séparer correctement les effets propres de ces facteurs d’amont de ceux liés à la technologie fromagère.

Qualité des vins et Terroirs. Incidence du milieu naturel sur la composition aromatique des vins

The northern vineyards produce wines with a high aromatic richness. The wines of Alsace are appreciated for the diversity of their aromas, the typicality of which was for a long time judged mainly according to the grape variety of origin. Alsatian winegrowers have however widely sensed the importance of the environment of the vine on the quality of the wines. Efforts are made to try to harmonize in a reasoned way the interaction between the natural environment and the plant material with a view to developing the character of the grape variety through the fine expression of the terroir and making the quality and typicality even more inimitable. wines produced in Alsace.