WAC 2022 banner
IVES 9 IVES Conference Series 9 WAC 9 WAC 2022 9 1 - WAC - Posters 9 Antioxidant activity of grape seed and skin extract during ripening

Antioxidant activity of grape seed and skin extract during ripening

Abstract

Reactive oxygen species (ROS) play an important physiological role in the body’s defense and being involved in numerous signaling pathways 1, 2. When the balance between oxidant and antioxidant species is altered in favor of ROS, oxidative stress is generated. In this condition the cells are damaged as the ROS oxidize important cellular components, such as proteins, lipids, nucleic acids and carbohydrates. The damage caused at the cellular level has repercussions on a systemic level favoring the appearance of various chronic and inflammatory diseases, such as cancer, cardiovascular diseases, type 2 diabetes and Alzheimer’s disease 3, 4. A way to keep the equilibrium in the organism is the intake of alimentary antioxidants that work synergistically with the endogenous ones to keep the good state of health. Dietary polyphenols are one of the most important groups of natural antioxidants, they are secondary metabolites found in fruits, vegetables, cereals, tea, wine. Grape is known to be one of the richest foods in polyphenols and the antioxidant activity of the grape is directly related to the phenolic concentration and composition, which varies during the ripening. In this work the antioxidant activity of grape seed and skin extracts of the red varieties Syrah, Tannat and Merlot during the ripening were evaluated through in vitro assays. The reference method Folin-Ciocalteu was used for the determination of the total polyphenol content (TPC) and the total antioxidant capacity (TAC) was determined through the radical scavenging assay using 1.1 -diphenyl-2-picrylhydrazyl (DPPH).5 The results of the analyses show that the seed extracts were richer in polyphenols than the skin extracts and had the highest antioxidant potential for all the grape ripening stages. The highest TPC and TAC values were found at the green stage for skins, at veraison for seeds.

[1] P. Tai, M. Ascoli, Reactive oxygen species (ROS) play a critical role in the cAMP-induced activation of Ras and the phosphorylation of ERK1/2 in Ledydig cells. Molecular endocrinology 25 (2011) 885-893.

[2] M. Valko, D. Leibfritz, J. Moncol, M. T. D. Cronin, M. Mazur, J. Telser, Free radicals and antioxidants in normal physiological function and human disease. The International Journal of Biochemistry & Cell Biology 39,1 (2007) 44-84.

[3] Grune, R. Shringarpure, N. Sitte, K. Davies, Age-Related changes in protein oxidation and proteolysis in mammalian cells. Journal of Gerontology, 56A (2001), B459-B467.

[4] N. Noguchi, E. Niki, Phenolic antioxidants: A rationale for design and evaluation of novel antioxidant drug for atherosclerosis. Free Radical Biology & Medicine, 28 (2000), 1538-1546.

[5] V.S. Chedea, R. M. Pop, Total polyphenol content and antioxidant DPPH assays on biological samples. In R. R. Watson (Ed.), Polyphenols in plants (2019) 169-183.

DOI:

Publication date: June 27, 2022

Issue: WAC 2022

Type: Article

Authors

Adriana Capozzi, Luca Garcia, Karen Lambert, Cédric Saucier

Presenting author

Adriana Capozzi – SPO, Université de Montpellier, INRAe, Montpellier SupAgro, 34000 Montpellier, France

SPO, Université de Montpellier, INRAe, Montpellier SupAgro, 34000 Montpellier, France | PhyMedExp, Université de Montpellier, INSERM U1046, UMR CNRS, 9412, Montpellier, France | SPO, Université de Montpellier, INRAe, Montpellier SupAgro, 34000 Montpellier, France

Contact the author

Keywords

skin-seeds-antioxidant activity-polyphenols-grape

Tags

IVES Conference Series | WAC 2022

Citation

Related articles…

The use of plasma activated water in barrel disinfection: impact on oak wood composition

The use of barrels is a practice that improves the quality of wines. The porous structure of wood favors the accumulation of microorganisms that can deteriorate the quality of wines so that barrel cleaning and sanitizing treatments are essential. The burning of sulphur discs has been the most common practice in winemaking because ots biocide effect. Nevertheless, its effectiveness is still insufficient and it is harmful for human health.

Relationships between sensitivity to high temperature, stomatal conductance and vegetative architecture in a set of grapevine varieties

High temperatures influence plant development and induce a large set of physiological responses at the leaf scale. Stomatal closure is one of the most observed responses to high temperatures. This response is commonly considered as an adaptive strategy to reduce water loss and embolism in the vascular system caused by the high evaporative demand.

Aceto Balsamico Tradizionale di Modena” PDO authenticity: detection of caramel-containing vinegar by HS-GC-IMS

Balsamic vinegars of Modena (Italy), namely Aceto Balsamico di Modena PGI (AB PGI) and Aceto Balsamico Tradizionale di Modena PDO (ABT PDO) are among the most important geographical indication products for Italy. ABT PDO, despite its very limited production, is recognized as one of the most representative Italian artisan gastronomic products, and it is known and commercialized all around the world. The economic value of ABT PDO (“affinato” and “extra-vecchio” types, depending on the aging), prepared following a traditional way and aged for many years in a set of barrels (transferring a certain amount of vinegar from one cask to another in a decreasing “topping up” procedure) is great, when compared to AB industrially prepared with caramel. AB PGI is certainly the most widespread industrial-type vinegar in the world, deriving from low-temperature condensed grape must (or cooked must) mixed with wine vinegar, obtaining balsamic vinegars with a caramel-like taste. Depending on its economic value, ABT PDO is often object of fraud, requiring to fight counterfeit products and imitations.

The terroir of Carnuntum: investigation of the physiogeographic characteristics and interdisciplinary study of viticultural functions of the Carnuntum wine district, Austria

During a three-year period, the vineyards of the Carnuntum wine district are investigated for their terroir characteristics. The interdisciplinary study is aimed at the description of the physiogeographic

Monitoring arthropods diversity in the “Costières de Nîmes” viticulture landscape

Biodiversity loss in agrosystems is partly due to landscape simplification (field enlargement, hedgerows removal…) that led to a loss of heterogeneity of the overall landscape.