GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Changes in phenolic maturity and texture characteristics of the grape berry under pre-, and post-veraison water deficit

Changes in phenolic maturity and texture characteristics of the grape berry under pre-, and post-veraison water deficit

Abstract

Context and purpose of the study – Kékfrankos (Vitis vinifera L.) grapevines grafted on Teleki-Kober 5BB rootstock were submitted to water deficit under greenhouse conditions. The aim of the experiment was to study the effect of pre-, and post-veraison water deficit on grape berry phenolic maturity and texture characteristics.

Material and methods – Plants were planted into 50L white plastic containers in a mixture of perlite (20 %), loamy soil (30 %) and peat (50 %) (v/v). Three regimes of water supply were examined: (1) moderate water deficit from berry set until veraison (WD1), (2) moderate water deficit from veraison until harvest (WD2), (3) no water deficit (C). The water deficit treatments defined by the leaf daily stomatal conductance (between
50-150 H2O mmol m-2s-1). Anthocyanin glucosides and flavonols from berry skin were measured by Shimadzu HPLC system, berry texture characteristics were monitored by TA.XT Plus Texture Analyser. Cell and seed maturity indexes (CMI %, SMI %) and basic parameters (yield, sugar concentration, pH, must acidity) were also investigated.

Results – Pre-veraison treatment resulted in the lowest berry and cluster weight. The highest sugar concentration was found in control berries, and it was followed by the WD1 and WD2 treatments. Berries of the well-watered plants presented the lowest phenolic concentration. Pre-veraison water deficit resulted in a sllighty higher concentration of anthocyanin-glucosides compared to post-veraison water deficit. Water restriction during the ripening period induced higher flavonol (ie. quercetin, kaempferol etc.) concentration related to berry skin fresh weight as well as to the whole berry compared to WD1 treatment. Berry skin hardness (Fsk) was the highest in the case WD2 and the lowest was in WD1. Similar results were obtained in the case of berry skin thickness (Spsk). Seed (SMI %) maturity index presented higher values in the case of WD treatments compared to C. Cell maturity index (CMI %) of WD2 was significantly higher than C and WD1, however no differences were found between C and WD1.

Download the PDF

DOI:

Publication date: June 18, 2020

Issue: GiESCO 2019

Type: Poster

Authors

Zsolt Zsófi1, Ottó Bencsik2, András Szekeres2, Xénia Pálfi3, Ádám Bozó1,Szabolcs Villangó1

(1) Eszterházy Károly University, Department of Viticulture And Oenology, Leányka Str. 6, Eger H-3300 Hungary
(2) University Of Szeged, Department Of Microbiology, Közép Fasor 52., Szeged, H-6726 Hungary, 3eszterházy Károly University, Food And Wine Research Institute, Leányka Str. 6., Eger, H-3300, Hungary

Contact the author

Keywords

water deficit, anthocyanin extractability, phenolic maturity, berry texture

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Digitization for automation–A frost management case study

The need to mitigate the yield impact of Spring frosts in vineyards remains a significant challenge around the world.

Read More

Fermentative volatile compounds and chromatic characteristics can contribute to Italian white wines diversity

Perceived aroma plays an important role in wine quality, and it depends mainly on the volatile composition. Volatile organic compounds (VOCs) from grapes and those formed during winemaking are involved in the sensory complexity of wines. In aroma-neutral winegrape varieties, the winemaking process itself, and particularly alcoholic fermentation (AF), impacts strongly on the organoleptic characteristics of wines due to the formation of volatile alcohols, acids, and esters. In addition, phenolic compounds could contribute not only to the wine color but also to VOCs evolution during AF.

Read More

Building of a hierarchy of wines based on terroirs: an initiative from the producers of Muscadet

The Muscadet area is situated in the southeast of Nantes, close to the Atlantic coast. It constitutes the western extension
of the French vineyard “Loire Valley”. The Muscadet is renowned and often spontaneously linked to a white wine.
However it remains misconceived as an ordinary wine, lacking authenticity.

Read More

INTEGRAPE guidelines and tools: an effort of COST Action CA17111

INTEGRAPE was a European interdisciplinary network for “data integration to maximize the power of omics for grapevine improvement” (CA17111, https://integrape.eu/), funded by the European COST Association from September 2018 to 2022. This Action successfully developed guidelines and tools for data management and promoted the best practices in grapevine omics studies with a holistic future vision of: “Imagine having all data on grapevine accessible in a single place”.

Read More

Comparison between the volatile chemical profile of two different blends for the enhancement of  “Valpolicella Superiore”

Valpolicella is a famous wine producing region in the province of Verona owing its fame above all to the production of two Protected Designation of Origins (PDOs) withered wines: Amarone and Recioto. In recent years, however, the wineries have been interested in the enhancement and qualitative increase of another PDO, Valpolicella Superiore. All the Valpolicella PDOs wines are produced with a unique grape blend, mainly Corvina, Corvinone, Rondinella and a range of other minor varieties.

Read More