IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Skin And Seed Extracts Differently Behave Towards Salivary Proteins

Skin And Seed Extracts Differently Behave Towards Salivary Proteins

Abstract

Background: Polyphenols extracted from skins and seeds showed different sensory attributes including astringency and bitterness. In previous studies, it has been demonstrated that extracts obtained either from skins or seeds interact differently with salivary proteins. Red grape winemaking consists of a maceration of the whole berries in which both skins and seeds are mixed together; however, no information on the mutual influence that skins and seeds could have on the reactivity towards saliva of hydroalcoholic extracts is known. In this study, five different  wine model solutions were prepared: the first one contained only skins (Sk), the second one contained only seeds (Sd) and the remaining three contained different skin/seed ratios, as detailed below: A (ratio 2:1 skin : seed), B(ratio 1:1 skin : seed) and C (ratio 1:2 skin: seed).

Methods: HPLC analyses were performed to determine the content of total native anthocyanins, acetaldehyde and polymeric pigments. Iron reactive phenolics, BSA reactive tannins (BSArT), vanillin reactive flavans (VRF) were also determined. The potential astringency of red samples was evaluated in vitro by the Saliva Precipitation index (SPI), which measures the reactivity of salivary proteins towards wine polyphenols.

Results: The results obtained in this experiment highlighted important differences in the behavior of the samples as a function of the different skin:seed ratio. When skins and seeds  were simultaneously present (samples A, B and C), a significant lower content of anthocyanins with respect to Sk was observed. This was likely due to a possible adsorption of pigments on cell walls contained in pomaces. As the amount  of seeds increased in the solutions containing also skins, the content of VRF, BSArT, PP and acetaldehyde linearly increased. After 24 months of aging under controlled conditions, all the trends observed at 0 time were confirmed and appeared to be enhanced. Concerning the interactions toward salivary proteins, as expected, sample Sd showed the highest SPI. Surprisingly, when skins were added to a model solution containing seeds, a decrease of SPI occurred, although VRF and BSArT increased. This suggests that  anthocyanins and polymeric pigments in A, B and C samples determined a lower reactivity of compounds contained in the whole solution towards saliva proteins. SPI values are not correlated to the amount of VRF and BSArT in the samples.

Conclusion:

Results of our study highlighted not only the important role of the skin:seed ratio in regulating the extraction of compounds from berries, but also that of anthocyanins extracted from skins in decreasing the reactivity of grape compounds towards saliva.

DOI:

Publication date: June 24, 2022

Issue: IVAS 2022

Type: Poster

Authors

Errichiello Francesco1, Guerriero Antonio1, Picariello Luigi1, Coppola Francesca1, Rinaldi Alessandra1,2, Forino Martino1 and Gambuti Angelita1

1Department of Agricultural Sciences, Grape and Wine Science Division, University of Naples Federico II
2Biolaffort, 126 Quai de la Souys, 33100 Bordeaux, France

Contact the author

Keywords

skin/seed extract; anthocyanins; polymeric pigments; astringency.

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Prediction of astringency in red wine using tribology approach to study in-mouth perception

AIM Astringency is described as a ‘dry puckering‐like sensation’ following consumption of tannins1 that affect consumer preference of foods and beverages, including red wine2. To improve the understanding of astringency, which is a complex interaction due to multiple mechanisms occurring simultaneously, further studies are needed. In this view, oral tribology is considered a useful technique for beverage study to evaluate the thin-film lubrication properties of saliva resulting in oral friction‐related sensations3. The aim of this study was to examine the film behavior of selected protein-based fluids under controlled friction conditions, to understand polyphenol-protein interactions involved in the sensation of astringency.

From local classification to regional zoning. The use of a geographic information system (GIS) in Franconia / Germany. Part 3: classification of soil parameters in vineyards

La conservation de la fertilité du sol est un aspect primordial dans la viticulture durable. Différents paramètres, comme par exemple la topographie, la composition du sol, les conditions climatiques, influencent la fertilité du sol des surfaces viticoes.

Vers des systèmes viticoles économes en pesticide. Étude du réseau DEPHY-Vigne

Dans le cadre de TerclimPro 2025, Esther Fouillet a présenté un article IVES Technical Reviews. Retrouvez la présentation ci-dessous ainsi que l’article associé : https://ives-technicalreviews.eu/article/view/8318

Evaluation of winegrape anthocyanins in the vineyard using a portable fluorimetric sensor: seasonal and water regime effects

Accumulation of anthocyanins (Anth) on whole winegrape (Vitis vinifera L.) bunches attached to the vine was monitored by a fluorescence-based sensor (Multiplex) on ‘Aleatico’ and ‘Nero d’Avola’. Different water regimes were applied.

Influence of the vintage, clone and rootstock on the chemical characteristics of Syrah tropical wines from Brazil

In the Northeast of Brazil, vines can produce twice a year, because annual average temperature is 26ºC, with high solar radiation and water availability for irrigation.

IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Skin And Seed Extracts Differently Behave Towards Salivary Proteins

Skin And Seed Extracts Differently Behave Towards Salivary Proteins

Abstract

Content of the article

References

Section for all references

DOI:

Publication date: June 24, 2022

Issue: IVAS 2022

Type: typeofthepublication

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

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Using open source software in viticultural research

Many high quality Open Source scientific applications have been available for a long time. Some of them have proved to be particularly useful for carrying out the usual activities involved in viticultural research projects, such as statistical analyses (including spatial analyses), GIS work, database management (possibly integrated with statistical and spatial analysis) and even “low-level” often highly time-consuming activities (e.g. repetitive task on text files).

Chemical composition of cool-climate Sauvignon blanc grape skins clones during ripening

Sauvignon blanc is the most important variety in cool valleys in central Chile accounting 15,522 ha which corresponds to 42.4% of the cultivated surface with white varieties in Chile

Comprendre la sensibilité des cépages, une clé pour la gestion durable de l’esca

Dans le cadre de TerclimPro 2025, Pierre Gastou a présenté un article IVES Technical Reviews. Retrouvez la présentation ci-dessous ainsi que l’article associé : https://ives-technicalreviews.eu/article/view/8300

Sustainable strategies for the management and valorization of wine lees

Wine lees represent an abundant yet largely undervalorised by-product of the winemaking industry.

Effect of moderate wine consumption in animal models

In 1979, the so-called “french paradox” was proposed, that is, a correlation between wine consumption, a diet rich in saturated fats, and a low mortality from coronary heart disease. On the other hand, it has also been described that alcohol consumption has negative effects on aging and increases the risk of liver cirrhosis and cancer. However, both hypotheses are based on population studies that may present distortions due to multiple factors (geographic, diet, smoking, socioeconomic level, etc.).