Macrowine 2021
IVES 9 IVES Conference Series 9 Relevance of the polyphenolic profile during oxidative aging in the accumulation and disappearance of oxidative and varietal aromas

Relevance of the polyphenolic profile during oxidative aging in the accumulation and disappearance of oxidative and varietal aromas

Abstract

The main objective of this work is to study and model the impact of the polyphenolic profile on the stability and quality of wine aroma during oxidative aging. Aromas considered in the study are grape-derived varietal aromas, such as linalool, geraniol and 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN), yeast-released varietal mercaptans, such as 4-mercapto-4-methyl-2-pentanone (4MMP), 3-mercaptohexyl acetate (MHA) and 3-mercaptohexan-1-ol (3MH)) and also oxidation-related aroma compounds, such as acetaldehyde and Strecker aldehydes: isobutyraldehyde, 2-methylbutyraldehyde, isovaleraldehyde, methional and phenylacetaldehyde. Fifteen aromatic phenolic fractions (FFAs) were extracted from garnacha, moristel and tempranillo grapes; FFAs were chemically characterized and were further reconstituted with water, alcohol, metal cations, amino acids and polyfunctional mercaptans so that differences were limited to the polyphenolic profile and to levels of precursors to varietal aroma compounds. Reconstituted samples were supplied with oxygen (50 mg/L) and aged during 35 days at 35ºC. Results show that the accumulation of acetaldehyde is uniform and very low in all the FFAs, confirming previous results about the low accumulation of this compound during oxidation. Nevertheless, acetaldehyde accumulation seems to be correlated with the sum of phenolic acids. Accumulation of Strecker aldehydes between samples differs by a 2.5 factor, with much higher levels in reconstitutions with FFAs from Garnacha and Moristel varieties. Levels of Strecker aldehydes were positively correlated to the sum of flavanols, phenolic acids and with the percentage of unpigmented tannins. Also, they appear to be negatively correlated with color, pigmented and total tannin concentrations and delphinidins. Polyfunctional mercaptans reacted spontaneously even in anoxia, so that final levels were significant only in unoxidized controls. In these samples, levels between different FFAs differed by factors of up to 2.6 and were negatively correlated to the contents of unpigmented tannins. The other varietal aromas (linalool, geraniol and TDN), were not affected by oxidation. All of this demonstrates that the phenolic composition plays a crucial role in the development of Strecker aldehydes during oxidative aging, likely due the differential reactivity of the quinones formed. The strong reactivity of wine polyphenols to polyfunctional mercaptans was not expected and should be further studied.

DOI:

Publication date: September 14, 2021

Issue: Macrowine 2021

Type: Article

Authors

Elena Bueno-Aventín

Laboratory for Aroma Analysis and Enology (LAAE), Department of Analytical Chemistry, Faculty of Chemistry. E-50009, Zaragoza, Spain,Vicente Ferreira-González, Ana Escudero-Carra   Laboratory for Aroma Analysis and Enology (LAAE), Department of Analytical Chemistry, Faculty of Chemistry. E-50009, Zaragoza, Spain

Contact the author

Keywords

polyphenol; acetaldehyde; aldehydes; polyfunctional mercaptans; oxidation

Citation

Related articles…

The evolution of the aromatic composition of carbonic maceration wines

The vinification by Carbonic maceration (CM) involves the process whereby the whole bunches are subjected to anaerobic conditions during several days. In this anaerobic condition, the grape endogenous enzymes begin an intracellular fermentation. This situation favors that whole grapes split open and release their juice into the tank, increasing the liquid phase that is fermented by yeasts [1]. Then, two types of wines are obtained; one from the free-run liquid in the tank (FCM) and other from the liquid after pressing the whole grape bunches (PCM). PCM wines are recognized as high quality young wines because their fruity and floral aromas[2] that although they are very intense at the end of the winemaking they gradually disappear during conservation.

Elicitors used as a tool to increase stilbenes in grapes and wines

The economic importance of grapevine as a crop plant makes Vitis vinífera a good model system to study the improvement of the nutraceutical properties of food products (Vezulli et al. 2007). Stilbenes in general, and trans-resveratrol in particular, have been reported to be responsible for various beneficial effects. Resveratrol´s biological properties include antibacteria and antifungal effects, as well as cardioprotective, neuroprotective and anticâncer actions (Guerrero et al. 2010 ). Stilbenes can be induced by biotic and abiotic elicitors since they are phytoalexins (Bavaresco et al. 2001).

Anthocyanins in tannat wines rapidly evolve toward unidentified red-coloured pigments

To assess the relationship between the reported low-stability of Tannat colour during wine storage and its pigment composition and evolution

Terroir in Slovak viticulture area

Terroir method has been used for assessment of growing site in the world for years. In Slovakia actually regionalisation is used as the similar method which does not cover all the elements of wine quality evaluation however.

Response of Albariño to local environmental conditions in Uruguay

Albariño is a white cultivar that has been recently promoted in Uruguay due to its ability to maintain high berry quality even in adverse climate conditions during ripening. This study aims to assess the effect of different topographic conditions on Albariño agronomic behavior and oenological potential.

Macrowine 2021
IVES 9 IVES Conference Series 9 Relevance of the polyphenolic profile during oxidative aging in the accumulation and disappearance of oxidative and varietal aromas

Relevance of the polyphenolic profile during oxidative aging in the accumulation and disappearance of oxidative and varietal aromas

Abstract

Content of the article

References

Section for all references

DOI:

Publication date: September 14, 2021

Issue: (ex: Issue: Terclim 2023)

Type: typeofpublication

Authors

author1, author2, author3

Presenting author

Description

List of affiliations ¹ ² ³

Contact the author

Email address (with mailto: link)

Keywords

List of different keywords (keyword1, keyword2, keyword3)

Tags

Citation

Related articles…

Effect of ozone treatments in wine production on colour traits, volatile composition, and sensory characteristics of young and short-term aged white wines

The main aim of WiSSaTech project (PRIN P2022LXY3A),supported by the Italian Ministero dell’Università e della Ricerca and European Union-NextGenerationEU, is to investigate eco-friendly and safe alternatives to sulphur dioxide (SO2) in wine production.

A comparative study on physiological responses to drought in wild Vitis species 

The crossings of three wild Vitis species are commonly used as rootstocks in wine production worldwide. Factors such as disease resistance and vigor are most important for their selection.
With climate change extending drought conditions and water limitations, the selection of rootstocks conferring increased tolerance to drought takes on greater importance. Therefore, identifying Vitis species with improved drought tolerance and incorporating them into breeding programs could contribute to more resilient rootstocks under water limiting conditions. Furthermore, those species serve as a valuable resource to increase genetic variability of rootstocks. We hypothesize that species native to drier habitats will exhibit superior physiological performance under drought stress.

Chardonnay white wine bottled with different oenological tannins: effect on colour traits, volatile composition and sensory attributes during shelf-life

The use of oenological tannins during winemaking has been mostly studied for improving colour traits and stability on red wines. Their effectiveness mainly depends on the tannin composition, grape variety and winemaking approach [1].

Grape variety identification and detection of terroir effects from satellite images

Satellite images are used to determine the reflectance dependency to wavelength in different grape varieties (Cabernet-Sauvignon, Merlot, Pinot Noir, and Chardonnay). The terroir influence is investigated through study of vineyards in France, Brazil and Chile.

Phenolic profile of fungus-resistant varieties (PIWIs) for red wine production

Context and Purpose of the Study. PIWI grape varieties (Pilzwiderstandsfähig, fungus-resistant) offer innovative solutions for sustainable viticulture by addressing environmental challenges faced by traditional Vitis vinifera.