Terroir 1996 banner
IVES 9 IVES Conference Series 9 Les propriétés de réflectance du sol de la parcelle sont à considerer comme des paramètres du terroir

Les propriétés de réflectance du sol de la parcelle sont à considerer comme des paramètres du terroir

Abstract

Suite à des expérimentations de solarisation artificielle réalisées en 1999 en conditions réelles de culture, à partir de matériels réfléchissants partiellement colorés en vert, en bleu, ou en rouge, on démontre que la sollicitation de la vigne par une réflexion rouge (vers 670 nm) est significativement plus efficace que toute autre réflexion colorée pour améliorer la qualité des raisins à la récolte, celle-ci étant jugée à la fois à partir des analyses biochimiques et à partir des dégustations. Les raisins “solarisés” en environnement lumineux rouge sont plus gros, plus sucrés, un peu moins acides et plus réguliers en taille et en couleur. Par ailleurs, dans le cas des raisins de table, la couleur des baies et le rendement commercial après tri sont significativement améliorés.
Les résultats suggèrent fortement que les propriétés optiques et spectrales (la réflectance) de la surface du sol de la parcelle (et aussi de l’environnement général de la souche) doivent, de la même façon que les revêtements de solarisation, influencer le développement et la qualité des raisins. Ces propriétés devraient être prises en compte dans les explications de l’effet terroir.
Aux niveaux physiologique et moléculaire, les auteurs considèrent que les effets bénéfiques liés à la lumière rouge doivent être spécifiquement médiatisés par l’équipement phytochromique de la vigne

DOI:

Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article

Authors

François-Xavier SAUVAGE**, Marc CHOVELON* and Jean-Pierre ROBIN**

*Sica ‘La Tapy’, 84200 Serres-Carpentras
**INRA Laboratoire de Biochimie Métabolique et Technologie, Institut des Produits de la Vigne, 2 Place Viala, 34060 Montpellier Cedex 1

Contact the authors

Keywords

vigne, raisin, terroir, sol, réflectance, lumière, solarisation

Tags

IVES Conference Series | Terroir 2000

Citation

Related articles…

Geopedological and climatic zoning of northern Malaga vineyards region: Fuente de Piedra, Humilladero and Mollina (southern Spain)

The vineyards placed in the municipal areas of Fuente de Piedra, Humilladero and Mollina constitute a wine-growing important area of the “Zona Norte” of the province of Málaga.

How are canned wine drinkers perceived? An investigation involving Swiss nationals and different scenarios of outdoor leisure activities

This study examines how people who consume wine in cans are perceived in terms of their basic personality characteristics, helps understand the role of cultural background on people’s perception, and verify the role played by the consumption context on the perception. Our hypothesis is that prejudice and negative attitudes towards wine in cans might exert a negative effect on the evaluation of people who consume canned wine. To evaluate this hypothesis, the consumption of wine in cans was evoked in four different contexts of use during outdoor leisure activity (beach resort, ski resort, desert safari, and party). In order to examine the effect of culture on subject’s response we use participants from Switzerland, a country where three different cultures, associated with three different languages, cohabit.

Genotypic differences in early-stage root architectural traits and consequences for water uptake in three grapevine rootstocks differing in drought tolerance

Root architecture (RSA), the spatial-temporal arrangement of a root system in soil, is essential for edaphic resources acquisition by the plant, and thus contributes largely to its productivity and adaptation to environmental stresses, particularly soil water deficit. In grafted grapevine, while the degree of drought tolerance induced by the rootstock has been well documented in the vineyard, information about the underlying physiological processes, particularly at the root level, is scarce, due to the inherent difficulties in observing large root systems in situ. The aims of this study were (i) to determine the phenotypic differences in traits related to root distribution and morphology along the substrate profile in different Vitis rootstocks during early growth, (ii) to assess the plasticity of these traits to soil water deficit and (iii) to quantify their relationships with plant water uptake.

Long-lasting flavour perception of wines treated with oenological additives considering the individual PROP taste-phenotype

The use of oenological additives is becoming a common practice due to the technological and sensory properties they provide to the wines. However, the number of studies focused on the impact that these additives might induce on wine flavor perception during wine tasting is still quite scarce. The aim of this work was to evaluate the effect of three different types of common oenological additives: two oenotannins (ellagitannin and gallotannin) and a commercial preparation of yeast mannoproteins on the long-lasting flavor perception (aroma and astringency).

New tool to evaluate color modifications during oxygen consumption in white and red wines

Measuring the effect of oxygen consumption on the color of wines as the level of dissolved oxygen decreases over time is very useful to know how much oxygen a wine can consume without significantly altering its color. The changes produced in wine after being exposed to high oxygen concentrations have been studied by different authors, but in all cases the wine has been analyzed once the oxygen consumption process has been completed. This work presents the results obtained with the use of an equipment designed and made to measure simultaneously the level of dissolved oxygen and the spectrum of the wine, during the oxygen consumption process from saturation levels with air to very low levels, which indicate the total consumption of the dosed oxygen[1,2].