Terroir 1996 banner
IVES 9 IVES Conference Series 9 Banques de données biologiques annuelles par terroir et optimisation des itinéraires culturaux

Banques de données biologiques annuelles par terroir et optimisation des itinéraires culturaux

Abstract

En complément des études sur les caractéristiques édaphiques et paysagères du milieu (Dolédec, 1995), la caractérisation de la physiologie de la vigne et du parasitisme au cours de son cycle végétatif représente une composante essentielle de connaissance et de gestion des terroirs.

L’examen des chroniques et données disponibles dans ce domaine souligne une importante variabilité entre années et pour une même année entre les terroirs, le climat jouant un rôle essentiel dans la structuration de ces fluctuations. L’étude du climat à deux échelles, régionale et mésoclimatique (Panigai, Langellier, 1992), s’avère en conséquence indispensable pour développer des outils d’aide à la décision (modèles) qui utilisent des données climatiques en entrée, pour guider le viticulteur dans certains choix culturaux. Ce travail nécessite une phase préalable de conjrontation temporelle et de validation spatiale des informations modélisées par rapport aux observations de terrain. La constitution sous-jacente de banques de données biologiques annuelles par terroir qui sont à créer doit être le fruit de synthèses regroupant des références de réseaux expérimentaux et d’enquêtes conduites auprès des professionnels. Le mildiou, pour le thème parasitaire, et le poids des grappes, pour la physiologie, sont présentés pour illustrer cette démarche.

DOI:

Publication date: March 25, 2022

Type: Poster

Issue: Terroir 1996

Authors

L. PANIGAI, D. MONCOMBLE, F. LANGELLIER, A. DESCOTES, C RINVILLE

Comité Interprofessionnel du Vin de Champagne
5, rue Henri-Martin – 51200 EPERNA

Tags

IVES Conference Series | Terroir 1996

Citation

Related articles…

Spatial suitability analysis for site selection of vineyards using biophysical models and computational intelligence

Developing a sustainable agricultural production system and acquiring the full potential of land resources requires employing land-use assessment. This entails knowledge of the climate, soil, and topography of the area of interest.

Measurement of redox potential as a new analytical winegrowing tool

Excell laboratory has initiated the development of an analytical method based on electrochemistry to evaluate the ability of wines to undergo or resist to oxidative phenomena. Electrochemistry is a powerful tool to probe reactions involving electron transfers and offers possibility of real-time measurements. In that context, the laboratory has implemented electrochemical analysis to assess oxidation state of different wine matrices but also in order to evaluate oxidative or reduced character of leaf and soil. Initially, our laboratory focused on dosage of compounds involved in responses of plant stresses and we were also interested in microbiological activity of soils. These analyses were compared with the measurement of redox potential (Eh) and pH which are two fundamental variables involved in the modulation of plant metabolism. Indeed, the variation of redox states of the plant reflects its biological activity but also its capacity to absorb nutriments. The Eh-pH conditions mainly determine metabolic processes involved in soil and leaf and our goal is to determine if this combined analytical approach will be sufficiently precise to detect biological evolutions (plant health, parasitic attack…).

Relationships between the Fregoni bioclimatic index (IF) and wine quality

The Fregoni bioclimatic index (IF) considers the daily temperature range during the ripening month and the number of days with temperature below 10°C.

Preliminary steps of a protocol to isolate transcription factors bound to a specific DNA locus in grapevine using CRISPR-dCas9 system

Cis-acting regulatory elements are DNA sequences that can be bound by transcription factors to regulate the expression of genes in a condition-dependent and tissue-specific way. It is nowadays possible to search for DNA motives and sequences that a given transcription factor is binding or at least can, but it is still hard to have a glance at all the transcription factors that are contemporaneously located at the same locus. Inspired by an existing technique that uses the CRISPR-Cas system in mammal cells, we are trying to develop a protocol to study such regulation in Vitis vinifera. Using the highly sequence-specific binding capacity of a catalytically inactive Cas9 protein (dCas9), our idea is to set up a system to target a desired sequence and precipitate all the crosslinked proteins and distantly interacting chromatin at this locus and analyze them.

Study of grape-ripening process variability using mid infrared spectroscopy

To obtain a quality wine, it is necessary to collect grapes in an optimal state of maturation, so the control of the ripening process is fundamental for the viticulturist.