Water relations of grapevine cv. Cortese with different training systems

Authors

  • V. Novello
  • A. Schubert
  • M. Antonietto
  • A. Boschi

DOI:

https://doi.org/10.5073/vitis.1992.31.65-75

Keywords:

training, microclimate, transpiration, hydration, leaf, shoot, yield, must quality

Abstract

Leaf (LWP) and stem water potential and stomatal conductance (SC) were measured during the day on grapevines trained with four different systems: traditional trellis, central curtain, Y trellis and double curtain. During most of the day LWP was lower and the stem to leaf water potential gradient was higher in the traditional trellis than in the other systems. On the contrary, very few differences were found as regards SC. Osmotic potential changed little during the day and among treatments. Traditional trellis vines had lower yield and total sugar production. The conclusion is drawn that training systems can affect water relations and in this way influence yield and must quality.

Relations hydriques de vignes du cépage Cortese élevées sous différents systèmes de conduite

Le potentiel hydrique des feuilles (LWP) et des tiges et la conductance stomatique (SC) ont été mésurés le long du jour sur des plantes de vigne élevés sous quatre systèmes de conduite: vigne palissée en taille Guyot, rideau simple, système Y, rideau double. Pendant la plupart du jour LWP a été plus réduit dans les vignes en Guyot tandis que le gradient de potentiel entre feuille et tige a été plus éléve chez le même système de conduite. Au contraire, les différences au niveau de SC ont été négligeables. Le potentiel osmotique de la feuille a peu changé le long du jour et entre les systemès de conduite. Les vignes en Guyot ont produit moins de raisins et de sucre. Le mode de conduite peut affecter les relations hydriques de la vigne et donc modifier la production et la qualité du moût.

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Published

2015-10-08

Issue

Vol. 31 No. 2 (1992): Vitis

Section

Article

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