Terroir 2010 banner
IVES 9 IVES Conference Series 9 Comparison of the free radical-scavenging activity in infected oidium and sound dolcetto grape cultivar grown in a terroir of Central Italy

Comparison of the free radical-scavenging activity in infected oidium and sound dolcetto grape cultivar grown in a terroir of Central Italy

Abstract

The importance of polyphenols, which are present in many vegetables and grapes too, is well-know and documented. Specific research works about the red grape and its derivative juices and wines show that the antioxidant and/or antiradical activities are directly correlated with the complex polyphenol matrix. The content of polyphenols in grapes is clearly affected by agroecological factors: the cultivar, climatic condition, the effect of geographic origin of grapes, soil, chemistry, fertilization, and the degree of maturation. Aim of this work was value the radical-scavenging activity of polyphenols extract from skins and seeds of Dolcetto cultivar derived from infected Oidium grape and from the same sound grape. Infested Dolcetto grapes and sound Dolcetto grapes were grown in same terroir and with same training system (cordon spur).
The antiradical activity was determined by assay of free radical– 2,2 Diphenyl-1-picryl-hydrazyl (DPPH) method and total polyphenols content was determined by Folin – Ciocalteu method. Data show significant increase of total polyphenols both in skins and seeds from infected Oidium Dolcetto grape with respect to skin and seed total polyphenols from sound grape. To the contrary antioxidant activity calculated as value of ARP (1/EC50 P/D) in infected grape decreased significantly respecting sound grape. Therefore a possible relationship between the change composition of polyphenols in infected grapes and antioxidant property is suggested. While the antioxidant activity, calculated as micromoles of Trolox/g sample, increase in skins and seeds from infested Oidium grape with respect to skins e seeds from sound grape.

Download the PDF

DOI:

Publication date: December 3, 2021

Issue: Terroir 2010

Type: Article

Authors

F. Cecchini (1), B.Giannini (2)

(1) Researcher CRA Unità per le produzione enologiche dell’Italia Centrale via Cantina sperimentale,1 -00049
Velletri (Roma), Italy
(2) Biology student CRA Unità per le produzione enologiche dell’Italia Centrale via Cantina sperimentale, 1 – 00049 Velletri (Roma), Italy

Contact the author

Keywords

Skins, seeds, Oidium, antioxidant activity, polyphenols

Tags

IVES Conference Series | Terroir 2010

Citation

Related articles…

The Douro region: wine and tourism

The Demarcated Douro Region (DDR) dates from 1756, when it was recognized as one of the first demarcated regions in the world. The DDR economic activities fit the terroir model and are based on wine and tourism.

Read More

Aspect juridiques des terroirs

Le “terroir” est dans tous les discours, les articles, les étiquettes et les publicités. Le voca­ble est en situation d’utilisation euphorique. Indiscutablement l’emploi historique est agri­cole, puis viticole, mais il n’est jamais juridique.

Read More

Volatile organic compounds investigation in Müller Thurgau wines obtained from vineyard treated with biochar

Volatile Organic Compounds (VOCs) are responsible for the flavor and aroma of a wine. The sensory qualities of the wines depend not only on grape intrinsic characteristics, but also on extrinsic factors including the soil composition. Previous studies have shown that the application of pyrogenic carbon (biochar) can lead to a change in soil parameters. For that reason, one of the goals of the ERDF funded project «WoodUp» is the characterization and reutilization of the locally produced biochar for agricultural purposes.

Read More

Petiole phosphorus concentration is controlled by the rootstock genetic background in grapevine: is this a key for understanding rootstock conferred vigour?

Grapevine, Vitis vinifera, requires grafting on Phylloxera tolerant rootstocks of American origin in most viticultural areas of the world. The most commonly used species in rootstock creation are V. berlandieri, V. riparia and V. rupestris. Rootstocks not only provide tolerance to Phylloxera but assure the supply of water and mineral nutrients to the scion. The objective of this work was to determine to what extent rootstocks of different parentages alter the mineral composition of petioles of grapevine.

Read More

The informative potential of remote and proximal sensing application on vertical- and overhead-trained vineyards in Northeast Italy

The application of remote and proximal sensing in viticulture have been demonstrated as a fast and efficient method to monitor vegetative and physiological parameters of grapevines. The collection of these parameters could be highly valuable to derive information on associated yield and quality traits in the vineyard. However, to leverage the informative potential of the sensing systems, a series of preliminary evaluations should be carried out to standardize working protocols for the specific features of a winegrowing area (e.g., pedoclimate, topography, cultivar, training system). This work aims at evaluating remote and proximal sensing systems for their performance and suitability to provide information on the vegetative, physiological, yield and qualitative aspects of vines and grapes as a function of different training systems in the Valpolicella wine region (Verona, Italy).

Read More