terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Phenolic composition profile of cv. Tempranillo wines obtained from severe shoot pruning vines under semiarid conditions

Phenolic composition profile of cv. Tempranillo wines obtained from severe shoot pruning vines under semiarid conditions

Abstract

One of the limitations of vineyards in warm areas is the loss of wine quality due to higher temperatures during the grape ripening period. In order to adapt the vineyards to these new climatic conditions, a possible solution is to delay the ripening process of the grapes towards periods with milder temperatures, by means of management practices and thus improve the quality of the fruit and the wine produced. The technique of severe shoot pruning (SSP) has proven useful in achieving this objective. This technique consists of trimming the developed primary shoots at the end of flowering, above the node number seven. The aim of this work was to evaluate the effect of SSP under drought conditions and high temperatures on the ‘Tempranillo’ wine phenolic composition compared with non-trimming vines (NT) grown under conventional practices (just winter pruning) during the 2022 season. None of the treatments were irrigated. The wines were elaborated according to traditional red wine-making method and their general and chromatic parameters were analysed. Respect to NT, the SSP treatment showed slightly lower ethanol content and significantly reduced the dry extract, pH, malic acid and potassium, total phenolic content and color intensity values. When the polyphenolic profile of wine was analysed by HPLC techniques, respect to NT wines, the SSP ones showed an increase in coumarilated anthocyanins, and a decrease in the concentration of monoglucoside anthocyanins, flavonols, phenolics acids and total anthocyanins content. In conclusion, under these study conditions (including non-irrigation, extremes temperatures and dry weather), severe pruning of the vine shoots was not effective in improving the phenolic profile of the wine. It would therefore be necessary to analyse this technique accompanied by supportive irrigation during the ripening cycle of the grapes.

Acknowledgements: This research was supported by funds from Project IB20082, the ERDF, Junta de Extremadura, AGA001 (GR21196) and Investigo Program, financed by The Recovery and Resilience Facility. The authors would like to thank Bodegas Viñas De Alange S.A. for their collaboration.

DOI:

Publication date: October 13, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Lavado N1*, Dorado M.J1, Mancha L.A1, Valdés M.E1, Uriarte D1, Guerra M.T2, Fondón-Aguilar A1, Moreno D1

1Centro de Investigaciones Científicas y Tecnológicas de Extremadura, 06187 Badajoz (España)
2Centro Universitario Santa Ana (CUSA). IX Marqués de la Encomienda, 2, 06200 Almendralejo, Badajoz

Contact the author*

Keywords

anthocyanin, flavanol, flavonol, phenolic acids

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Effect of spray with autochthonous Trichoderma strains and its secondary metabolites on the quality of Tempranillo grape

Trichoderma is one of the most widely used fungal biocontrol agents on vineyards due to its multiple benefits on this crop, such as its fungicidal and growth promoting capacity. In this work, we have analyzed the effect on the concentration of nutrients in grapevine leaves and on the quality of the grape must after spraying an autochthonous strain of Trichoderma harzianum and one of the main secondary metabolites produced by this genus, 6-pentyl-α-pyrone (6PP).

Read More

Drought responses of grapevine cultivars under different environments

Using grapevine genetic diversity is one of the strategies to adapt viticulture to climate change. In this sense, assessing the plasticity of cultivars in their responses to environmental conditions is essential. For this purpose, the drought tolerance of Grenache, Tempranillo and Semillon cultivars grafted onto SO4 was evaluated at two experimental vineyards, one located in Valencia (Spain) and the other in Bordeaux (France). This was done by assessing gas exchange parameters, water relations and leaf hydraulic traits at the end of the season.

Read More

Effect of foliar application of urea and nano-urea on the cell wall of Monastrell grape skins

The foliar application of urea has been shown to be able to satisfy the specific nutritional needs of the vine as well as to increase the nitrogen composition of the must. On the other hand, the use of nanotechnology could be of great interest in viticulture as it would help to slow down the release of urea and protect it against possible degradation. Several studies indicate that cell wall synthesis and remodeling are affected by nitrogen availability.

Read More

Genetic identification of 200-year-old Serbian grapevine herbarium

Botanist Andreas Raphael Wolny collected a grapevine herbarium from 1812-1824 in Sremski Karlovci (wine region of Vojvodina, Serbia), which represents local cultivated grapevine diversity before the introduction of grape phylloxera in the region. The herbarium comprises over 100 samples organized into two subcollections based on berry colour (red and white varieties), totaling 47 different grape varieties. The objective of this study was to investigate the historical varietal assortment of Balkan and Pannonian winegrowing areas with long viticulture traditions.

Read More

Influence of polysaccharide extracts from wine by-products on the volatile composition of sparkling white wines

In the production of sparkling wines, during the second fermentation, mannoproteins are released by yeast autolysis, which affect the quality of the wines. The effect of mannoproteins has been extensively studied, and may affect aroma and foam quality. However, there are no studies on the effect of other polysaccharides such as those from grapes. Considering the large production of waste from the wine industry, it was proposed to obtain polysaccharide-rich extracts from some of these by-products[1].

Read More