Terroir 2020 banner
IVES 9 IVES Conference Series 9 Influence of deficit irrigation on grapevine cv. “Touriga Nacional” in Douro region: A metabolomic approach

Influence of deficit irrigation on grapevine cv. “Touriga Nacional” in Douro region: A metabolomic approach

Abstract

Aim: This study aimed to evaluate whether irrigation of Touriga Nacional in Douro Demarcated Region (DDR) can partly mitigate the negative impacts of ongoing climate change on grapevine yield and quality and its impact on plant metabolism.

Methods and results: Water status was determined by performing pre-dawn leaf water potential (ΨPd) using a pressure chamber throughout the growing season. Although from the end of July till the end of August of 2018 both R30 and R70 significantly prevented a decay of ΨPd under extreme drought conditions, R30 promoted only a relatively small increase of yield at harvest, but this increase was not observed at R70. In 2019, drought conditions were not so harsh than in 2018 and differences in cluster weights were not observed among irrigation treatments at harvest. A UPLC-MS-based targeted metabolomic analysis from the vintage 2018 identified 44 compounds in grapes from non-irrigated (R0), irrigated at 30% of evapotranspiration (ETc; R30) and 70% ETc (R70), corresponding to eight classes: amino acids; phenolic acids; stilbenoid DP1; stilbenoid DP2; flavonols; flavan-3-ols; di-OH anthocyanins and tri-OH anthocyanins. PCA analysis showed that irrigation influenced the composition of the different classes of grape berry compounds e.g. amino acids, phenolic acids, stilbenoids, flavonols, flavan-3-ols, and anthocyanins.

Conclusions:

In the two consecutive seasons of 2018 and 2019 in DDR irrigation at R30 and R70 failed to bring Touriga Nacional vines to hydric comfort at veraison, when drought stress was more pronounced, and did not substantially affect yield and berry quality traits at harvest. However, UPLC-MS-base metabolomics analyses highlighted that berry metabolism was tuned under different irrigation regimes, but more water did not traduce in higher contents of key metabolites like anthocyanins

Significance and Impact of the Study: Douro Demarcated Region (DDR) has a Mediterranean climate with low rainfall values during summer, high temperatures and high levels of radiation. The introduction of irrigation in this region is still a matter of debate due to the limited number of available studies.

Download the PDF

DOI:

Publication date: March 25, 2021

Issue: Terroir 2020

Type : Video

Authors

Inês Cabral1*, António  Teixeira2, Arnaud  Lanoue3, Marianne  Unlubayir3, Thibaut  Munsch3, Joana  Valente4, Fernando  Alves4, Pedro  Costa4, Frank  Rogerson4, Susana  Carvalho1, Hernâni  Gerós2,5,6, Anabela  Carneiro1, Jorge  Queiroz1

1GreenUPorto – Research Centre for Sustainable Agrifood Production & DGAOT, Faculty of Sciences, University of Porto, Vairão, Portugal
2Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Gualtar, Portugal
3Université de Tours, EA2106 Biomolécules et Biotechnologie Végétales, Tours, France
4Symington Family Estates, Vila Nova de Gaia, Portugal
5Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
6Centre of Biological Engineering (CEB), Department of Biological Engineering, University of Minho, Gualtar, Portugal

Contact the author

Keywords

Deficit irrigation, metabolomics, leaf water potential, grape quality

Tags

IVES Conference Series | Terroir 2020

Citation

Related articles…

Using GIS to assess the terroir potential of an Oregon viticultural region

Deciding to grow grapes in Oregon is complex issue due to our diverse geography, climate, and relatively short history of grape growing. For any potential grape grower, vineyard site selection is the single most important decision they will face.

Read More

MONITOR SOME KEY PARAMETERS THROUGH THE IMPLEMENTATION OFCONTINUOUS CONTROL SYSTEMS OF THE MUST-WINE DURING MACERATION-FERMENTATION IN RED WINEMAKING TO MANAGE OPERATIONS IN “AUTOMATION”

This study is aimed to develop a complete tool for the winemaker with, complete and targeted “winemaking recipes” that can be adapted to criteria set by the winemaker, such as: grape variety, grape health status, degree of ripening, desired wine, redox status throughout the alcoholic fermentation.
To get such aim, specific sets of experiments using red grape juices from different varieties (Nebbiolo, Barbera, Pinot noir, etc.) collected at different technological and phenolic maturity points, will be held with “automatized 4.0 tanks” equipped with sensors for measuring: redox potential, dissolved oxygen, relative density, temperature, and color in order to collect a sufficient amount of data preparatory to the creation of operating models in the most widely winemaking situations in which the automatized 4.0 tanks “will be able to independently respond” with the right corrective actions (opening/closing aeration valve, execution/block pumping overs , etc.) if the key parameters exceed the limits of the recommended ranges set in the selected recipe.

Read More

Physiological responses of crimson seedless (Vitis vinifera) grapevines to altered micro climatic conditions and different water treatments in the Breede River Valley of South Africa

Challenging conditions created by limited water supply and changes in the climate require an understanding of the physiological status of table grapes along the whole value chain. This is critical to develop tools for regulatory management of growth balances and grape quality. This study aimed to determine the impact of different amounts of water and an altered micro-climate (complete covering of vineyards with plastic) on the physiological reaction of the grapevine during the growth season.

Read More

The use of local knowledge relating to vineyard performance to identify viticultural terroirs in Stellenbosch and surrounds

A terroir represents grouping of homogenous environmental units, or natural terroir units, based on the typicality of the products obtained. Identification and characterisation of terroirs depends on knowledge of environmental parameters, the functioning of the grapevine and characteristics of the final product, which must be placed in a spatial context.

Read More

The potential of some native varieties of Argentina for the production of sparkling wines. Effect of lees contact time 

Grapevine varieties from South-America, commonly known as criollas, originated because of the natural crossbreeding of grapevine varieties brought by the Spaniards. The objective of this work was to evaluate the potential of some varieties to produce sparkling wines considering the effect of lees contact time. The following varieties were used: Moscatel Rosado, Criolla Chica, Pedro Gimenez, Blanca Oval, Canelón, and the European variety Chardonnay (control), planted in the ampelographic collection of EEA Mendoza INTA (Argentina). Pilot-scale vinifications were carried out to obtain the base wines, in 20 L glass containers. The second fermentation was performed through the traditional method.

Read More