Original research articles

Grapevine fruiting cuttings: validation of an experimental system to study grapevine physiology. I. Main vegetative characteristics

Abstract

A method for producing fruiting cuttings of grapevine cv. Cabernet Sauvignon is described. The main developmental features of these cuttings are presented. The clusters reach maturity after 5 months and the period of cluster development is not shortened. Before flowering, a careful control of stem and leaf growth improves the partitioning of stored carbon towards the roots and the cluster. Vegetative growth occurs mainly between fruit set and veraison. During ripening, the leaf to fruit ratio is between 20 and 30 cm2 of leaf area per gram of fruit. In the cuttings as well as in grapevines from the vineyard, free polyamine content in the leafblade does not change during development. Conjugate polyamine content does not evolve in the same way. It peaks at veraison for vineyard leaves but decreases continuously for cuttings. A proper nutrient solution provides a minerai composition in accordance with viticultural requirements. The cuttings also behave like vineyard plants in response to different levels of potassium in the nutrient solution.

Authors


Nathalie Ollat

Affiliation : UMR Ecophysiologie et Génomique Fonctionnelle de la Vigne, Bordeaux Sciences Agro, INRA, Université de Bordeaux, Villenave d’Ornon, France

ollat@bordeaux.inra.fr

Laurence Geny

Affiliation : Univ. Bordeaux, ISVV, EA 4577, USC 1366 INRA, Unité de recherche OEnologie, 210, Chemin de Leysotte 33882 Villenave d'Ornon, France


Jean-Pierre Soyer

Affiliation : I.S.V.V., UMR Écophysiologie et Génomique Fonctionnelle de la Vigne, INRA, University of Bordeaux 2, University of Bordeaux 1, ENITA, Villenave d'Ornon, France; INRA, Domaine de la Grande Ferrade, BP 81, 33883 Villenave d'Ornon, France

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