Terroir 1996 banner
IVES 9 IVES Conference Series 9 Territoires et zones viticoles. Aspects climatiques, pédologiques, agronomiques. Caractérisation des terroirs viticoles: une étude systémique

Territoires et zones viticoles. Aspects climatiques, pédologiques, agronomiques. Caractérisation des terroirs viticoles: une étude systémique

Abstract

On assiste actuellement à l’émergence d’une demande sociale forte à l’égard de fonctions par ailleurs traditionnelles de l’agriculture, qui concernent la gestion des ressources du milieu, le maintien d’un tissu social rural, la valorisation des territoires ruraux et l’entretien des paysages.
L’intérét suscité amène à préciser comment se pose aujourd’hui à la recherche, la question de la gestion des territoires ruraux. En effet, les impératifs de la production agricole, les phénomènes de déprise et les directives européennes et mondiales relatives à la protection de l’environnement, conduisent à analyser précisément le métier et la fonction d’agriculteur et du vigneron en l’occurrence.
Je pense que les conclusions d’un tel colloque feront non seulement émettre une réflexion, mais surtout apporteront des éléments de réponse, pour une prise en compte réelle de la gestion des territoires (ce qui nécessite bien entendu des méthodologies de délimitation ou de zonage).
La diversité des champs disciplinaires concernés, des méthodologies mises en oeuvre, des partenaires impliqués, montre bien l’ampleur et la complexité d’une réflexion à laquelle souhaitent s’associer les acteurs de développement local, les décideurs, les professionnels de l’agriculture, de la viticulture et des structures de transformation, mais aussi plus largement les consommateurs.
La qualité s’élabore tout au long d’un processus. Ceci sollicite des compétences variées en agronomie, en création variétale, en technologie … Une telle approche de la qualité des produits peut constituer un principe fédérateur puissant, dans un contexte où le pilotage de la consommation par l’aval en fait un élément déterminant de la compétitivité des filières et de leur diversification.

DOI:

Publication date: March 2, 2022

Issue: Terroir 1998

Type: Article

Authors

CHRISTIAN ASSELIN

INRA-URW-Angers
42, rue Georges Morel – 49071 Beaucouzé cedex

Tags

IVES Conference Series | Terroir 1998

Citation

Related articles…

The wine microbial consortium: a real terroir characteristic

Yeast, bacteria, species and strains play a key role in the winemaking process by producing metabolites which determine the sensorial qualities of wine. Therefore microbial population numeration, species identification and strains discrimination from berry surface at harvest to storage in bottle are fundamental.

Does spotted lanternfly phloem-feeding have downstream effects on wine volatiles? Preliminary insights into compositional shifts

The Spotted lanternfly (SLF), first detected in the U.S. in 2014, is an invasive phloem-feeding planthopper that poses a growing threat to grape and wine production in the U.S. In Pennsylvania, where it was first detected, reductions in grapevine production and fruit quality have been reported by commercial growers. Recent advances have begun to elucidate how SLF affects grapevine physiology and resource allocation, but no research has identified how SLF affects wine chemical composition and quality. Documented reductions in fruit sugar allocation due to heavy SLF phloem-feeding may have downstream effects on wine fermentation dynamics. Additionally, secondary metabolic responses stimulated by SLF may also influence berry chemical composition. The present study investigated SLF-mediated effects on wine composition through analysis of the volatile composition of wines produced from white- and red-fruited varieties of different Vitis parentage (e.g., Vitis vinifera vs. interspecific hybrids) following prolonged exposure to adult SLF phloem-feeding.

Can varietal ‘apricot’ aroma of Viognier wine be controlled with clonal selection and harvest timing?

Recent wine-like reconstitution sensory studies confirmed that several monoterpenes were the key aroma compounds in the perception of an ‘apricot’ aroma attribute in Viognier wine.

Unravel the underlying mechanisms of delaying ripening techniques in grapevine

In a scenario of changing climate conditions, grapevine is significantly affected at multiple levels. Advancements in phenology and berry ripening, however, are the major dynamics of the generalized increase in average temperature and evaporative demand, negatively affecting berry quality and productivity. The aim of this work was to unravel the underlying mechanisms of bunch-zone auxin application (NAA; 1-Naphthaleneacetic acid) and source-limiting canopy management approaches in delaying berry ripening. In randomized block design experiments, control vines were compared to vines treated with NAA, subjected to apical-to-bunch defoliation or antitranspirant application (n=10-to-42 plants per treatment).

Influence Of Phytosterols And Ergosterol On Wine Alcoholic Fermentation For Saccharomyces Cerevisiae Strains

Sterols are a fraction of the eukaryotic lipidome that is essential for the maintenance of the cell membrane integrity and their good functionality. During alcoholic fermentation, they ensure yeast growth, metabolism and viability, as well as resistance to osmotic stress and ethanol inhibition. Two sterol sources can support yeasts to adapt to fermentation stress conditions: ergosterol, produced by yeast in aerobic conditions, and phytosterols, plant sterols found in grape musts imported by yeasts in anaerobiosis. Little is known about the physiological impact of the assimilation of phytosterols in comparison to ergosterol and the influence of sterol type on fermentation kinetics parameters.