Macrowine 2021
IVES 9 IVES Conference Series 9 Macrowine 9 Macrowine 2021 9 Grapevine diversity and viticultural practices for sustainable grape growing 9 From vineyard to a glass of wine: the effect of abscisic acid application on mouhtaro, a rare autochthonous variety of greece

From vineyard to a glass of wine: the effect of abscisic acid application on mouhtaro, a rare autochthonous variety of greece

Abstract

In a context of a sustainable viticulture, a new uprising strategy to improve grape and wine composition (or quality) is the exogenous application of plant activators(Gil-Muñoz et al., 2017). This treatment stimulates the biosynthesis of secondary metabolites in grape berries (Ruiz-García et al., 2013) In an open field, the plant hormone (Abscisic Acid), was applied on a red grape variety Mouhtaro cultivated at the Muses Valley (Askri, Viotia, Greece). Treatments were in triplicates during veraison in a randomized complete block design, with 10 vines in each replicate. Vines were sprayed at veraison stage, 3 and 6 days after the first application, at 2 different concentrations and grapes were harvested at optimum sugar maturity. Targeted UPLC-MS analysis was performed since It was suggested that exogenous ABA influence specific polyphenolic compounds. Then, classic red winemaking procedure was applied. The effect of exogenous ABA application on gene expression level was also examined. Standard analytical methods recommended by O.I.V. were used for grapes and wines as well as analysis for the phenolic composition. The pH increased in wines originated from grape berries treated with higher doses. Accordingly, phenolic compounds were higher in ABA-treated grapes and respective wines Similarly, the expression of specific genes encoding for key enzymes of the phenylpropanoid pathway was upregulated. As a consequence, Abscisic Acid affected the composition and sensory analysis of the wines differently. The unique wine profiles of Mouhtaro and their different responses to biostimulant factors could be valuable for developing various types of Mouhtaro red wines with improved quality

DOI:

Publication date: September 2, 2021

Issue: Macrowine 2021

Type: Article

Authors

Kontoudakis Nikolaos1,; Aggeliki Kouki1; Zacharias Nikolaos4; Alatzas Anastasios2; Chatzopoulos Polydeykis2; Marianne Unlubayir3, Arnaud Lanoue3; Kotseridis Yorgos1

  1. Agricultural University of Athens, Department of Food Science and Human Nutrition, Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Enology and Alcoholic Drinks, 75 IeraOdos, 11855 Athens, Greece
  2. Agricultural University of Athens, Department of Biotechnology, Molecular Biology Laboratory, 75 IeraOdos, 11855 Athens, Greece
  3. Université François-Rabelais de Tours, EA 2106 «Biomolécules et BiotechnologieVégétales», UFR des Sciences Pharmaceutiques, 31 Av. Monge, F37200 Tours, France
  4. Muses Estate, Askri Viotias, 32002, Greece

Contact the author

Keywords

vitis vinifera, mouhtaro, wine, gene expression, absiscic acid, grape berry, polyphenolic profile

Citation

Related articles…

Are biochemical markers the key to predicting wine aroma balance?

Wine aroma quality is a complex interplay of factors like terroir, vinification techniques, that modulate aroma compound composition.

Read More

NIR spectroscopy as a contacless rapid tool to estimate the amino acids profile in intact grape berries

Nitrogen composition of grape berries plays a key role in determining wine quality, affecting the development of alcoholic fermentation and the formation of volatile compounds. Grape nitrogen composition is influenced by several factors such as viticultural practices, soil management, timing or rate of fertilization and use of rootstock, among others.In this study a proximal, non-destructive tool based on NIR spectroscopy is presented to track the accumulation of a wide range of amino acids in intact grape berries during the ripening process.

Read More

Unveiling the Grapevine Red Blotch Virus (GRBV) host-pathogen arms-race via multi-omics for enhanced viral defense 

The Grapevine Red Blotch Virus (GRBV) poses a critical challenge to the wine sector, lacking a uniquely identified vector. Current control methods involve costly and labor-intensive vine removal, emphasizing the urgency for targeted alternatives. The limited understanding of intricate host-virus interactions underscores the need for foundational knowledge to develop innovative disease control strategies. These include efforts to boost the plant’s RNA interference (RNAi) response, including RNA-based topical applications.

Read More

Impact of soil-applied and foliar-applied nitrogen on grape and wine composition

Foliar application of urea may be an efficient way to alter grape and wine composition without increasing vine vigor. However, we know little about the impact of this practice on phenolic compounds and yeast assimilable nitrogen (YAN). Adequate YAN is required for an efficient and complete fermentation, while phenolics are particularly important for the sensory profile of red wines. The goal of this study is to test the impact of foliar urea application at veraison, compared to the traditional soil-applied nitrogen fertilization early in the season, on Syrah berry and wine composition in field conditions.

Read More

Vineyard innovative tools based on the integration of earth observation services and in-field sensors (VitiGEOSS project)

Climate change is having an unprecedented impact on the wine industry, which is one of the major agricultural sectors around the world. Global warming, combined with the variation in rainfall patterns and the increase in frequency of extreme weather events, is significantly influencing vine physiology and exposing, more frequently, plants to severe biotic and abiotic stresses. This represents a challenge for viticulturists who need to take complex decisions to adjust vineyard management and achieve oenological goals.

Read More