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…

Effect of irrigation and soil type on root growth and distribution of Vitis vinifera L. cv. Nero d’Avola grown in Sicily

L’essai a été effectué dans un vignoble du cépage Nero d’Avola greffé sur 1103 Paulsen dans un terroir de la D.O.C Alcamo en Sicile. Le système de conduite des vignes était à espalier, la taille à cordon coursonné et l’irrigation à goutte a goutte. On a été confrontés trois types de traitements: A) vignes non irriguées; B) vignes irriguées quand le

Read More

Anthropogenic factors in modulations of fungal populations from grapes to wines and their repercussions on wine characteristics

The effects of anthropogenic activities on vineyard (different plant protections) and in winery
(pressing/clarification step, addition of sulfur dioxide) on fungal populations from grape to wine were studied. The studied anthropogenic activities modify the fungal diversity. Thus, lower biodiversity of grapes from organic modality was measured for the three vintages considered compared to biodiversity from ecophyto modality and conventional modality. The pressing / clarification steps strongly modify fungal populations and the influence of the winery flora is highlighted.

Read More

Drought effect on aromatic and phenolic potential of seven recovered grapevine varieties in Castilla-La Mancha region (Spain)

The effects of climate change are seriously affecting the quality of wine grapes. High temperatures and drought cause imbalances in the chemical composition of grapes. The result is overripe grapes with low acidity and high sugar content, which produce wines with excessive alcohol content, lacking in freshness and not very aromatic. As a consequence, the search of varieties with capacity of produce quality grapes in adverse climate conditions is a good alternative to preserve the sustainability of vineyards. In this work, quality parameters of seven Vitis vinifera L. cultivars (five whites and two reds) recently recovered from extinction and grown under two different hydric regimes (rainfed and irrigated) were analyzed during the 2020 vintage. At harvest time, weight of 100 berries, must physicochemical parameters (brix degree, total acidity, malic acid, pH), and carbon and oxygen isotope ratios (δ13C, δ18O) were determined. Subsequently, varietal aroma potential index (IPAv) and total polyphenol index (TPI) were analyzed. Quality parameters, IPAv and TPI, showed significant differences between varieties and water regimes. Both red varieties, Moribel and Tinto Fragoso, stood out for their high aromatic and phenolic potential, which was higher under rainfed regime. Regarding to white varieties, Montonera del Casar and Jarrosuelto stood out in terms of varietal aroma potential. Montonera del Casar high acidity in its musts and Jarrosuelto showed the highest berry weights.

Read More

Potential of native Uruguayan yeast strains for production of Tannat wine

Must fermentation is a complex process influenced by various factors, especially microbiological activities. The characteristics and quality of the resulting wine are closely linked to the stages that unfold throughout this progression.

Read More

Metodología para la zonificación de áreas vitícolas: aplicación en un area modelo del Penedés

Se propone una metodología para la zonificación del viñedo, a partir de las características climáticas, edáficas y geomorfológicas, en una área de 3700 ha del Penedés

Read More