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…

Managing local field variability in the framework of precision viticulture

Managing grapevines according to the practices of Precision Agriculture (PA), may prove to be an asset in the hands of the modern grape growers.

Read More

Predictive Breeding for Wine Quality: From Sensory Traits to Grapevine Genome

New pathogen resistant varieties allow an efficient and greatly reduced use of fungicides. These new varieties promise, therefore, an enormous potential to reach the European Green Deal aim of a 50% reduction of pesticides in EU agriculture by 2030.

Read More

Enhancing the color traits of ‘Nebbiolo’ and ‘Dolcetto’ grapes: the role of abscisic acid during ripening

The red Italian variety Nebbiolo (Vitis vinifera L.), used in the production of the prestigious Barolo and Barbaresco wines, is renowned for its aromatic and structural complexity but also for its low color intensity.

Read More

Development of a new method to understand headspace aroma distribution and explore the pre-sensory level in perceptive interactions involved in red wine fruity aroma expression

A part, at least, of red wines fruity expression may be explained by perceptive interactions involving particularly various substituted ethyl esters and acetates present at concentration far below their olfactory threshold, specifically thanks to synergistic effects. Wine sensory perception is directly linked to the stimulation of the taster at the level of olfactory epithelium by volatiles. These compounds are liberated from the matrix to the atmosphere, and will then be smelt. From a physico-chemical point of view, these volatiles ability to be released may be evaluated by their partition coefficients, which correspond to the volatile concentration ratio between the liquid and gas phase. Our goal is, through these coefficients determination, to assess if volatile matrix composition is able to impact the volatility of some compounds, and then explain sensory perception, i.eto evaluate what is called the pre-sensorial level impact.

Read More

Epigenetics: an innovative lever for grapevine breeding in times of climate changes

Climate change results in erratic weather conditions, which may lead for many crops including grapevine, to a reduced production and products of lower quality. Concerning grapevine, climate change results in shorter growing seasons and dates for budbreak, flowering and fruit maturity occur earlier in many regions. It also leads to an increase of various pests and diseases, as well as the vectors responsible for disease distribution.

Read More