Terroir 1996 banner
IVES 9 IVES Conference Series 9 Report on the work carried out by the zoning group of the O.I.V.

Report on the work carried out by the zoning group of the O.I.V.

Abstract

[English version below]

La création officielle du groupe Experts Zonage Vitivinicole à l’O.I.V., qui s’inscrit dans la Commission Viticulture, est récente. Le Professeur Mario FREGONI en assure la présidence depuis 1998, assisté du vice-président et du secrétaire général Mario FALCETTI. Ils ont été confirmés dans leurs fonctions lors des sessions de mars 2001. Actuellement, le groupe d’experts Zonage Vitivinicole de l’O.I.V. se compose de 40 délégués, représentant 18 pays membres. La mise en place de ce groupe a tout d’abord été initiée par l’Instituto Agrario de San Michele (Italie) et l’Unité de Recherches Vigne et Vin du Centre INRA d’Angers (France). Une collaboration entre les chercheurs s’est installée très tôt, dès 1987. Puis, celle-ci a été très largement encouragée lors de contacts établis par le Chargé de Mission de l’Ambassade R.S.A. en France, au près des diverses équipes qui travaillent sur le sujet (San Michele, Angers, Piacenza, Milan, Madrid), ainsi qu’avec la Direction Générale de l’Institut National des Appellations d’Origine de France. Tous les échanges ont conduit au 1er Colloque International sur les Terroirs Viticoles à Angers en 1996 avec une organisation bicéphale (URVV Angers et ISVV Montpellier). Une enquête de l’O.I.V. sur les travaux de zonage vitivinicole a été réalisée en 1997 et 1998 et les résultats restitués en 1999. Elle fait ressortir le nombre important d’études entreprises dans le monde, en France surtout, mais également en Italie. Trois congrès ont suivi : Sienne en 1998, Tenerife en 2000 et Avignon en 2002. Une des principales résolutions a été exprimée lors des conclusions du dernier congrès à Tenerife. Elle suggère de créer des groupes nationaux ayant pour objectif de faire le point, par pays, sur les dossiers “terroirs” et de réfléchir sur les méthodologies employées. Le souci majeur est de faire ressortir les éléments du milieu naturel qui concourent à l’originalité des vins d’une région, afin d’en expliciter les effets. L’objectif à atteindre est bien de préciser pour une région viticole donnée, les facteurs naturels qui génèrent « l’authenticité » par une prise en compte rationnelle de la variabilité induite par le couple génotype x milieu. De ce fait, la notion de «Terroir» devient un élément clé, mais il doit être précisé.

The official establishment of the group of experts of distribution in zones of OIV Vitiviniculture which arises from the Commission of vine growing – is recent. The professor Mario FREGONI is its present since 1998, and he has been re-elected during March 2001 meetings assisted of vice-president and company secretary Mario FALCETTI. Nowadays, the OIV Vitiviniculture Zoning Expert Group is composed by 40 delegates, representing 18 member countries. The creation of this group has been initiated by the Instituto Agrario of San Michele (Italy) and Unité de Recherches Vigne et Vin of INRA centre of Angers (France). Collaboration between the researchers has been installed since 1987. The responsible of the Embassy of R.S.A. in France has been establishing contacts with the several teams (San Michele, Angers, Piacenza, Milan, Madrid) that work on the matter and with the General Direction of Institut National des Appellations d’Origine (INAO), France. All the exchanges have led to the, First International conference on the Terroir at Angers in 1996, organized by URVV Angers and ISVV Montpellier. An OIV enquiry on the vitiviniculture zoning works was realized in 97 and 98 and the results published in 99. It shows the important number of undertaken studies in the world, especially in France, but also in Italy. Three congresses followed: Siena in 1998, Tenerife in 2000 and Avignon in 2002. One of the main resolutions approved at the end of the last meeting, Tenerife 2000, suggests creating national groups with the objective to define, per country, the «Terroir » files and to reflect upon the used methodologies. The major issue is to show the elements of the natural environment that contributes to the originality of the wines of a region as to show its influences. The aim is to describe for a specific viticultural region the natural factors that generate the « authenticity » through taking rationally into account the variability induced by interaction between genotype and environment. As such, the notion of «Terroir » becomes a key element, but needs to be précised.

DOI:

Publication date: February 15, 2022

Issue: Terroir 2002

Type: Article

Authors

ASSELIN Christian

INRA UVV – 42 rue Georges Morel – 49070 BEAUCOUZE

Tags

IVES Conference Series | Terroir 2002

Citation

Related articles…

Investigation on Valbelluna area and its oenological potentiality: case study on Prosecco DOC

Valbelluna valley is an area located in the northeastern Italy. It is extended from the East-West between Feltre and Belluno, along the Piave waterway and enclosed between Cansiglio valley on the South and the Dolomites in the North. Here, the villages of Limana and Trichiana are present, which are considered for decades potentially interesting areas to aim a niche production with own particular properties.The position of this area, its sun exposition, its soil composition and the microclimate, are ideal factors to obtain vines and consequently wines with unique features especially regarding the diversity and complexity aroma.

Cinétique de développement de la Pourriture Noble dans différents terroirs des Coteaux du Layon : mise au point d’une méthodologie

Dans la région des Coteaux du Layon, en Maine et Loire, l’effet terroir et son déterminisme sont étudiés dans le cadre de la production des vins liquoreux.
Ces vins sont le résultat d’une maturité poussée au delà de celle prévue par la nature afin de donner aux baies une teneur en sucre et en matière sèche très forte, pour mieux valoriser ces effets de la surmaturation, les baies sont récoltées selon la méthode des tries successives (Asselin et al, 1996). Ainsi, on ne récolte à chaque passage que les grains ayant atteint le niveau de concentration requis pour obtenir des vins à fort degré d’alcool avec des sucres résiduels.

Sustaining wine identity through intra-varietal diversification

With contemporary climate change, cultivated Vitis vinifera L. is at risk as climate is a critical component in defining ecologically fitted plant materiel. While winegrowers can draw on the rich diversity among grapevine varieties to limit expected impacts (Morales-Castilla et al., 2020), replacing a signature variety that has created a sense of local distinctiveness may lead to several challenges. In order to sustain wine identity in uncertain climate outcomes, the study of intra-varietal diversity is important to reflect the adaptive and evolutionary potential of current cultivated varieties. The aim of this ongoing study is to understand to what extent can intra-varietal diversity be a climate change adaptation solution. With a focus on early (Sauvignon blanc, Riesling, Grolleau, Pinot noir) to moderate late (Chenin, Petit Verdot, Cabernet franc) ripening varieties, data was collected for flowering and veraison for the various studied accessions (from conservatory plots) and clones. For these phenological growing stages, heat requirements were established using nearby weather stations (adapted from the GFV model, Parker et al., 2013) and model performances were verified. Climate change projections were then integrated to predict the future behaviour of the intra-varietal diversity. Study findings highlight the strong phenotypic diversity of studied varieties and the importance of diversification to enhance climate change resilience. While model performances may require improvements, this study is the first step towards quantifying heat requirements of different clones and how they can provide adaptation solutions for winegrowers to sustain local wine identity in a global changing climate. As genetic diversity is an ongoing process through point mutations and epigenetic adaptations, perspective work is to explore clonal data from a wide variety of geographic locations.

Effect of power ultrasound treatment on free and glycosidically-bound volatile compounds and the sensorial profile of red wines

AIM Aiming to explore the possibility of shortening red winemaking maceration times (1,2), this study presents the effect of the application of high-power ultrasounds to crushed grapes, at winery-scale, on the content of varietal volatile compounds (free and glycosidically-bound) in musts and on the overall aroma of wines.

Influence of grapevine rootstock/scion combination on rhizosphere and root endophytic microbiomes

Soil is a reservoir of microorganisms playing important roles in biogeochemical cycles and interacting with plants whether in the rhizosphere or in the root endosphere. The composition of the microbial communities thus impacts the plant health. Rhizodeposits (such as sugar, organic and amino acids, secondary metabolites, dead root cells …) are released by the roots and influence the communities of rhizospheric microorganisms, acting as signaling compounds or carbon sources for microbes. The composition of root exudates varies depending on several factors including genotypes. As most of the cultivated grapevines worldwide are grafted plants, the aim of this study was to explore the influence of rootstock and scion genotypes on the microbial communities of the rhizosphere and the root endosphere. The work was conducted in the GreffAdapt plot (55 rootstocks x 5 scions), in which the 275 combinations have been planted into 3 blocks designed according to the soil resistivity. Samples of roots and rhizosphere of 10 scion x rootstock combinations were first collected in May among the blocks 2 and 3. The quantities of bacteria, fungi and archaea have been assessed in the rhizosphere by quantitative PCR, and by cultivable methods for bacteria and fungi. The communities of bacteria, fungi and arbuscular mycorrhizal fungi (AMF) was analyzed by Illumina sequencing of 16S rRNA gene, ITS and 28S rRNA gene, respectively. The level of mycorrhization was also evaluated using black ink coloration of newly formed roots harvested in October. The level of bacteria, fungi and archaea was dependent on rootstock and scion genotypes. A block effect was observed, suggesting that the soil characteristics strongly influenced the microorganisms from the rhizosphere and root endosphere. High-throughput sequencing of the different target genes showed different communities of bacteria, fungi and AMF associated with the scion x rootstock combinations. Finally, all the combinations were naturally mycorrhized. The root mycorrhization intensity was influenced by the rootstock genotype, but not by the scion one. Altogether, these results suggest that both rootstock and scion genotypes influence the rhizosphere and root endophytic microbiomes. It would be interesting to analyze the biochemical composition of the rhizodeposition of these genotypes for a better understanding of the processes involved in the modulation of these microbiomes. Moreover, crossing our data with the plant agronomic characteristics could provide insights into their roles on plant fitness.