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IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2015 9 GiESCO 2015 – Session 1: Ecophysiology, water, irrigation 9 Hydraulic conductance of grapevine leaves under different radiation and water regimes

Hydraulic conductance of grapevine leaves under different radiation and water regimes

Abstract

The combined effects of radiation and water supply on leaf water potential, stomatal conductance and petiole hydraulic conductance (kpetiole) of field-grown grapevines (Vitis vinifera L. cv. Chasselas) were studied during 2013 growing season at the Agroscope Research Station in Leytron (Switzerland). Combinations of two irrigation levels (I: irrigated and NI: non- irrigated) with four radiation levels were studied in a “pergola” training system. The I vines were watered weekly with 16 L/vine from bloom to veraison while the NI vines were not irrigated during the whole season. Water infiltration from rain was avoided by covering the soil around them with a plastic film. Different radiation levels were obtained by choosing different leaf positions on the “pergola”: East, Top, West and Interior Shaded leaves which received 35.7, 61.2, 33.6 and 1.48 mol.m-2 .d-1 of photosynthetic active radiation respectively. Leaf water potential, stomatal conductance and petiole hydraulic conductance were reduced in NI vines along the season, and showed a distortion of xylem cells morphology compared to I vines. Regardless of the treatment applied, petiole hydraulic conductance decreased after midday, as vapor pressure deficit and evapotranspiration increased, and recovered again during the afternoon. Petiole hydraulic conductance of I vines was more responsive to the environmental variables (temperature and radiation) than NI vines.
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Publication date: 07/09/2026

Issue: GiESCO 2015

Type: Extended abstract

Authors

Silvina Dayer1, Vivian Zufferey2,*, Katia Gindro2, Francine Voinesco2, Jorge A. Prieto1, Jorge Perez Peña1

1 INTA EEA Mendoza, San Martín 3853, Luján de Cuyo (5507), Mendoza, Argentina

2 Agroscope, Institut des sciences en production végétale IPV, Route de Duillier 50, 1260 Nyon, Switzerland

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Keywords

petiole, water stress, stomatal and hydraulic conductances, light, Vitis vinifera

Tags

GiESCO | GiESCO 2015 | IVES Conference Series

Citation

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