Terroir 2008 banner
IVES 9 IVES Conference Series 9 Impact of water stress on the phenolic composition of cv. Merlot grapes, in a typical terroir of the La Mancha region (Spain)

Impact of water stress on the phenolic composition of cv. Merlot grapes, in a typical terroir of the La Mancha region (Spain)

Abstract

The study was carried out in 2006 with Merlot grapes from vines grown using the trellis system, where four treatments were compared with different levels of water stress. These levels were established using irrigation to maintain pre-dawn leaf water potential (ΨPD) values between two different phenological intervals: flowering-veraison and veraison-maturity. Leaf area index (LAI), exposed leaf area (SA) and production were also measured. Conventional grape parameters (weight, ºBaumé, pH and malic acid) and seed and skin phenolic compounds (anthocyanins, procyanidins, tannins and total polyphenols) were also analyzed. The results showed that when grape weight diminished as a result of water stress, the percentage weight of grape skins with respect to total grape weight was maintained, but seed weight increased. When the water stress integral increased, total polyphenol, procyanidin and tannin concentrations in the seeds also increased.

Download the PDF

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article

Authors

Juan Luis CHACÓN VOZMEDIANO, Esteban GARCÍA ROMERO, Jesús MARTÍNEZ GASCUEÑA, Raquel ROMERO PECES and Sergio GÓMEZ ALONSO

Servicio de Investigación y Tecnología. Instituto de la Vid y del Vino de Castilla-La Mancha
(IVICAM). Carretera de Albacete, s/n. 13700 Tomelloso, Spain

Contact the author

Keywords

grape, Merlot, phenolic compounds, water stress

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Grapevine Shiraz disease-associated viruses lead to yield losses by altering transcription of genes

Context and Purpose of Study. Grapevine Shiraz disease (SD), which is associated with Grapevine Virus A (GVA), is one of the highly destructive diseases affecting Australian and South African vineyards.

Read More

The valorization of wine lees as a source of mannoproteins for food and wine applications

AIM. Wine yeast lees constitute a winemaking by-product that, unlike grape skins and seeds, are not sufficiently exploited to add value to the winemaking sector, as their treatment and disposal generally represents a cost for wineries [1].

Read More

Evaluation of Valdadige DOC “Terra dei Forti” vineyards by zoning approach

La conoscenza dell’interazione genotipo x ambiente e pertanto della caratterizzazione territoriale è di prioritaria importanza nella valutazione dei siti. Grazie alla combinazione di dati GIS

Read More

High-resolution climate modelling for the Cognac region under climate change

Climate change has varied effects across French vineyards, with marked regional differences in temperature shifts. Fine-scale studies highlight significant local climate variability, emphasizing the need for precise regional characterization to adapt vineyard management at the regional scale.

Read More

Grapevine genotypes with potential for reducing the carbon footprint in the atmosphere and cultivation in a biological system

The concentration of CO2 in the atmosphere is increasing from year to year. Taking into account the calculations of the greenhouse gas inventory, it was found that approximately 70% of CO2 in the atmosphere is absorbed by vegetation (forests, agricultural land, etc.).

Read More