terclim by ICS banner
IVES 9 IVES Conference Series 9 Effects of graft quality on growth and grapevine-water relations

Effects of graft quality on growth and grapevine-water relations

Abstract

Climate change is challenging viticulture worldwide compromising its sustainability due to warmer temperatures and the increased frequency of extreme events. Grafting Vitis vinifera L. (traditional cultivars for wine production) onto North American grapevine species or hybrids is routinely used in most grape growing areas accounting for about the 80% of vineyards globally. Grapevine grafting started at the end of the 19th century to combat phylloxera (Daktulosphaira vitifoliae), since many of the American Vitis species are tolerant to this soil born pest. Decline of vineyard longevity might be partially explained by a decline in grafting quality in the nurseries. Omega grafting stands out as the most popular grafting method given its higher success rate in nurseries. However, the high pace of the grafting production leads to a poor-quality union of the graft point, with a smaller contact surface and presumably a worse connection area, compromising the phloem and xylem formation. Thus, we hypothesized that performing an omega graft of higher or lower technical quality could have implications on grapevine physiology, especially in terms of water relations. We identified two levels of technical quality: CA, completely aligned scion and rootstock cuttings where the scion and the cane had the same diameter and PA, partially aligned scion and rootstock cuttings where the scion and rootstock had different diameters. Results showed that CA plants had a higher rate of vegetative growth and higher gas exchange performance in terms of transpiration and canopy stomatal conductance. These trends were not explained by increased hydraulic conductivity at the scion level, thus, results suggested an effect of the grafting quality on the phloem formation. Therefore, this study highlights the relevance of exploring the effect of the grafting quality on the grapevine water relations to identify how the changes in plant performance could help on achieving resilient plants to water stress or drought.

DOI:

Publication date: May 31, 2022

Issue: Terclim 2022

Type: Article

Authors

Diana Marín1,2, Nazareth Torres1,2, Silvina Dayer3, Ana Villa-Llop1, Francisco Javier Abad1,4, Gregory A. Gambetta1, José M. Torres-Ruiz5 and Luis Gonzaga Santesteban1,2

1Dept. of Agronomy, Biotechnology and Food Science, Public University of Navarre, Pamplona, Spain
2Institute for Multidisciplinary Research in Applied Biology (IMAB-UPNA), Public University of Navarre, Pamplona, Spain
3EGFV, Univ. Bordeaux Bordeaux Sciences Agro, INRAE, ISVV, Villenave d’Ornon, France
4INTIA, Edificio de Peritos Avda. Villava, Spain
5Université Clermont-Auvergne, INRAE, PIAF, Clermont-Ferrand, France

 

Contact the author

Keywords

gas exchange, hydraulic conductivity, leaf area, omega grafting, water status

Tags

IVES Conference Series | Terclim 2022

Citation

Related articles…

Investigating the conceptualization and practices linked to peppery notes in Syrah red wines by French winemakers from different regions

The peppery attribute is often used to describe the aroma of Syrah wines. Rotundone was identified as the main aroma compound responsible for these notes. A significant percentage of anosmic respondents to this molecule was reported in previous studies. However, in most cases, these anosmic respondents, formally tested through three-alternative forced choice (3AFC), frequently declare being able to perceive peppery notes in wines. The main objective of this study was to investigate how anosmic French producers from two different regions conceptualize the peppery notes in Syrah red wines, and how they link it to production practices in comparison with non-anosmic producers.

Spatial determination of areas in the Western Balkans region favorable for organic production

In problematic conditions for production of grapes and wine caused by the COVID-19 pandemic and the resulting occurrence of wine surpluses, producers are increasingly turning to the innovative viticulture and winemaking of products that are more appealing to the market and the consumers. On the other hand, consumption of the food safety or organic products, and therefore of organic grapes and wine, is increasingly common in the world, in particular in Europe. The Regional Rural Development Standing Working Group (SWG RRD), as a regional intergovernmental organization gathers actors in the viticulture and winemaking sector from states and territories of the Western Balkans (South-East Europe) in the Expert Working Group for Wine, with the aim of improving viticulture and winemaking in this region through joint activities. In accordance with the aforementioned, the SWG RRD is working on advancing organic production of grapes and wine, and on recognition of specificities of the terroir of wine-growing areas in Western Balkans. In addition, as part of the project “Facilitation of Exchange and Advice on Wine Regulations in Western Balkan Countries” helmed by the German Federal Ministry of Food and Agriculture, in addition to harmonization of relevant legislation with EU regulations, efforts are being invested towards recognition of organic wines. Within activities and project implemented by this organization, expert analyses and scientific research of the terroir of Western Balkans were carried out, and some of the results are presented in this paper.

Variability in the content of coarse elements in a viticultural plot in the Graves appellation: relationship with geophysical data

Il a été souvent démontré (Seguin, 1970), que les meilleurs terroirs sont ceux qui présentent pendant la période de maturation du raisin, une régulation et une limitation de l’alimentation hydrique de la vigne. Si on s’intéresse aux facteurs influençant ce régime hydrique, on constate le rôle prépondérant du taux d’éléments grossiers non poreux qui limitent la réserve utile du sol en diminuant le taux de terre fine. De plus, ces éléments grossiers jouent également un rôle au niveau du pédo-climat thermique car leur conductivité thermique et leur chaleur spécifique sont plus élevées que celles de la terre fine. Ainsi le sol se réchauffera et se refroidira plus rapidement (Saini et McLean, 1967), (Gras, 1994).

Towards faultless Grenache wines: impact of climate and maturity

Climate change is affecting wine production and inducing significant variability in wine composition between vintages.

The surprising role of VvLYK6 in grapevine immune responses triggered by chitin oligomers

For sustainable viticulture, the substitution of chemical inputs with biocontrol products has become one of the most considered strategies. This strategy is based on elicitor-triggered immunity that requires a deep understanding of the molecular mechanisms involved in plant defense activation. Plant immune responses are triggered through the perception of conserved microbe-associated molecular patterns (MAMPs) which are recognized by pattern recognition receptors (PRRs) at the plasma membrane.