Terroir 2006 banner
IVES 9 IVES Conference Series 9 The effect of rootstock on water relations and gas exchange of Vitis vinifera cv. Xinomavro

The effect of rootstock on water relations and gas exchange of Vitis vinifera cv. Xinomavro

Abstract

The effect of two rootstocks of different drought tolerance (1103 Paulsen and 3309 Couderc) on sap flow, water relations and gas exchange of cv. Xinomavro (Vitis vinifera L.) was investigated during the 2005 season in Naoussa, Greece. Soil was maintained at field capacity for both rootstock treatments until mid July when a restricted water regime was applied by irrigation cutoff. Sap flow diurnals for the Xinomavro-1103P combination showed a rapid decrease of flow after midday, under water stress conditions. On the contrary, vines grafted on 3309C maintained the transpiratory flux during the day, despite conditions of limited water availability. Vines grafted onto 1103P had significantly higher (less negative) values of late afternoon (16h00) stem water potential, compared to those grafted on 3309C. Simultaneous assimilation and stomatal conductance values were significantly lower for the Xinomavro-1103P combination compared to Xinomavro on 3309C. These results support the possibility of a more sensitive drought avoidance mechanism for vines grafted on 1103P based on stomatal control. On the contrary, 3309C allowed this cultivar to maintain higher stomatal conductance and water uptake under water deficit. Grapes from the Xinomavro-3309C combination exhibited significantly superior sugar content at harvest, expressed on a per g of fresh berry weight basis. Since growth and yield parameters were similar among treatments, this finding is likely to be related to the higher afternoon photosynthetic rate of 3309C-grafted vines, prior to harvest.

Download the PDF

DOI:

Publication date: January 12, 2022

Issue: Terroir 2006

Type: Article

Authors

Stefanos KOUNDOURAS (1), Eleftheria ZIOZIOU (1), Nikolaos NIKOLAOU (1) and Konstantinos ANGELOPOULOS (2)

(1) Laboratory of Viticulture, School of Agriculture, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
(2) Laboratory of Plant Physiology, Department of Biology, University of Patras, 26500, Patras, Greece

Contact the author

;

Keywords

rootstock, drought tolerance, sap flow, stem water potential, gas exchange

Tags

IVES Conference Series | Terroir 2006

Citation

Related articles…

The terroir of Carnuntum: investigation of the physiogeographic characteristics and interdisciplinary study of viticultural functions of the Carnuntum wine district, Austria

During a three-year period, the vineyards of the Carnuntum wine district are investigated for their terroir characteristics. The interdisciplinary study is aimed at the description of the physiogeographic
Read More

Evolution and sensory contribution of ethyl acetate in sweet wines

Ethyl acetate (EtOAc) is the main ester present in all wines, generally produced by yeasts during alcoholic fermentation and sometimes by bacteria during barrel ageing. Its odor is characterized by solvent notes, which give wines their acescent note [1].

Read More

The dynamics of δ13C and δ18O in musts during berries development

Aim: Many processes or reactions that occur in plants involved isotopic discrimination. Water availability, for example, affects the isotopic ratio of carbon (δ13C) and oxygen (δ18O). In viticulture, δ13C is used in experiments related to water relations and irrigation in vineyards. δ18O is used much less but it could be a good complement to δ13C. The aim of this study was to generate knowledge on how these isotopic ratios, measured in musts, could help to better understand the water behavior of grape varieties. 

Read More

Staying hydrated – not easy when it’s hot!

Heat and drought episodes during the growing season are becoming more frequent and more severe in many of the world’s grape‐growing regions

Read More

EFFECTS OF BIODYNAMIC VINEYARD MANAGEMENT ON GRAPE RIPENING MECHANISMS

Biodynamic agriculture, founded in 1924 by Rudolph Steiner, is a form of organic agriculture. Through a holistic approach, biodynamic agriculture seeks to preserve the diversity of agriculture and the existing interactions between the mineral world and the different components of the organic world. Biodynamic grape production involves the use of composts, herbal teas and mineral preparations such as 500, 501 and CBMT.
Several scientific studies have provided evidence on the effects of biodynamic farming on the soil, the plant and the wine. Numerous empirical opinions of wine growers support the existence of differences brought by such a management.

Read More