terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 What to do to solve the riddle of vine rootstock induced drought tolerance

What to do to solve the riddle of vine rootstock induced drought tolerance

Abstract

Climate change will increase the frequency of water deficit situation in some European regions, by the increase of the evapotranspiration and the reduction of rainfalls during the growing cycle. This requires finding ways of adaptation, including the use of plant material which is more tolerant to drought. In addition to the varieties used as scions that result in the typicality of wines, rootstocks constitute a relevant way of adaptation to more stressful environmental conditions.

The rootstock genotype impacts grapevine functioning at three levels: the absorption of water, the water transport and the water consumption. The variability of root anatomy, root depth and water extraction capacity may explain water deficit responses differences observed or measured between rootstocks in pot or in field experiments. Whole root hydraulic conductance differed between sensitive and tolerant rootstocks. Vine water use are related to the leaf area and the vigor conferred, but also to regulatory processes, partially independent during the day and the night. Gas exchanges regulation along the day and night but also with the variation of the water status, i.e. the transpiration plasticity to water status, is in fact partially controlled by rootstocks.

Despite the empirical knowledge and the increasing interest dedicated research on grapevine rootstocks, the mechanisms involved in all these responses to water deficit remain poorly understood. Data from the literature and recorded in Bordeaux will be synthesized. Some challenges have to be met to get further crucial information about the traits conferring a higher adaptation to water deficit in order to speed up the selection of new rootstocks tolerant to drought. These challenges, i.e. the variability of the responses due to water status scenario (the intensity and the occurrence in the cycle of the water deficit), the choice of the traits measured and their plasticity, as well as rootstock scion interactions, will be discussed.

DOI:

Publication date: October 4, 2023

Issue: ICGWS 2023

Type: Article

Authors

Elisa Marguerit1, Louis Blois1, Marine Morel1, Davide Biancchi1, Jean-Pascal Tandonnet1, Marina de Miguel1, Gregory Gambetta1, Nathalie Ollat1

1 EGFV, University of Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV
2 Department of Agricultural and Environmental Sciences, University of Milan, via G. Celoria 2, 20133 Milano, Italy

Contact the author*

Keywords

Vitis, root, δ13C, transpiration, plasticity, genetic architecture

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Survey of pesticide residues in vineyard soils from the Denomination of Origin Ribeiro

Vineyards from mild temperature, high humidity locations receive often treatments with fungicides to prevent damages produced by fungi responsible for mildium, oidium and botrytis infections. In addition, insecticides are also applied to vineyards to fight again pests, which affect directly, or indirectly (as vectors of different diseases), their productivity. A fraction of the above compounds reaches the soil of vineyards, either during application, or when released from the canopy of vines due to rain-wash-off. Thereafter, depending on soil conditions (pH, organic matter) and environmental variables (regimen of rain, slope of vineyards), they might persist in this compartment, be degraded and/or transferred to water masses, modifying the biodiversity of soils and/or affecting the quality of water reservoirs.

Analysis of volatile composition of interaction between the pathogen E. necator and two grapevine varieties

Volatile organic compounds (VOCs) are emitted by nearly all plant organs of the plants, including leaves. They play a key role in the communication with other organisms, therefore they are involved in plant defence against phytopathogens. In this study VOCs from grapevine leaves of two varieties of Vitis vinifera infected by Erysiphe necator were analysed. The varieties were selected based on their susceptibility to pathogen, Kishmish Vatkana has the Ren1 resistance gene and Zamarrica showed high susceptibility in previous trials.

Phenolic composition and chromatic characteristics of blends of cv. Tempranillo wines from vines grown with different viticultural techniques in a semi-arid area

The quality and color stability of red wines are directly related to content and distribution of phenolic compounds. However, the climate change produces the asynchrony between the dates of technological and maturity of grapes. The crop-forcing technique (CF) restores the coupling between phenolic and technological ripeness while limits vineyard yields. Blending of wines is frequently used to equilibriate composition of wines and to increase their stability, color and quality. The aim of the present work is to study the phenolic composition and color of wine blends made with FW (wines from vines subjected to CF) and CW (wines for vines under the usual cultivation practices).

Influence of different Lachancea thermotolerans strains in wine acidity

Wine acidity is a parameter of great importance that influences different quality factors of the product such as biological stability or organoleptic characteristics. In the current context of climate change, which gives rise to wines with higher levels of ethanol and lower acidity, the biological acidification with yeast species such as Lachancea thermotolerans could be a solution.
In this work, the effect of the inoculation of different L. thermotolerans on the acidity of wine was studied.

Inert gases persistence in wine storage tank blanketing

It is common to find tanks in the winery with wine below their capacity due to wine transfers between tanks of different capacities or the interruption of operations for periods of a few days. This situation implies the existence of an ullage space in the tank with prolonged contact with the wine causing its absorption/oxidation. Oxygen uptake from the air headspace over the wine due to differences in the partial pressure of O2 can be rapid, up to 1.5 mL of O2 per liter of wine in one hour and 100 cm2 of surface area1 and up to saturation after 4 hours.