 IVES 9 IVES Conference Series 9 The aroma diversity of italian white wines

The aroma diversity of italian white wines

Abstract

AIM: Aroma is a key contributor to white wines sensory typicality, perceived diversity and overall preference. Italy produces dry still white wines from native grape varieties and geographically defined areas, representing different grapegrowing, winemaking and cultural heritages. The related chemical and sensory elements, the relevant pathways and variables, and the factors associated with their olfactive perception are in large part not known. Altogether, this limits the implementation of production and marketing strategies truly based on the specificity of Italian white wines, with reduced competitiveness and sustainability. The aim of this project is to provide, by means of chemical and sensory approaches, a comprehensive characterization of the chemosensory diversity of Italian white wines.

METHODS: The project will focus on wines of the following appellations/varieties: Arneis, Albana, Erbaluce, Falanghina Fiano, Garganega, Greco di Tufo, Lugana, Nosiola, Pinot Grigio, Ribolla, Traminer aromatico, Trebbiano d’Abruzzo Verdicchio, Vernaccia di San Gimignano, Vermentino. Samples will be collected directly from wineries. About 20 wines will be collected for each appellation/variety. Analyses will include GC-MS and GC-O for the identification and quantification of the most potent impact odorants of each wine type, HPLC, SDS-PAGE, and UV-Vis for the quantification of non-volatile components, E-nose untargeted fast profiling of wine volatile composition, sensory evaluation by means of both rapid and descriptive methodologies. The main pathways of formation of the most relevant aroma compounds will be investigated, as well as their interactions with non-volatile components. Chemoperception mechanisms of selected key odorants will also be studied at the level of receptor-ligand interactions.

RESULTS: The chemical and sensory drivers of Italian white wine intrinsic and perceived diversity will be established, enabling optimized management of winemaking procedures, sustainable long-term strategies for geographical indication protection, tailored marketing and consumers response strategies and preferences.

ACKNOWLEDGMENTS:

This project is funded by Italian Ministry of Education and Research (MIUR), PRIN 2017.

DOI:

Publication date: September 10, 2021

Issue: Macrowine 2021

Type: Article

Authors

Maurizio Ugliano

University of Verona, Italy,Matteo MARANGON, University of Padova, Italy Fulvio MATTIVI, University of Trento, Italy Giuseppina Paola PARPINELLO, University of Bologna, Italy Paola PIOMBINO, University of Naples, Italy Luca ROLLE, University of Turin, Italy

Contact the author

Keywords

italian white wines, aroma

Citation

Water availability at budbreak time in vineyards that are deficitary irrigated during the summer: Effect on must volatile composition

In recent years, Mediterranean regions are being affected by marked climate changes, primarily characterized by reduced precipitation, greater concurrence of temperature extremes and drought during the growing season, and increased inter-annual variability in temperatures and rainfall. Generally, high-quality red wines need moderate water deficit. Hence, irrigation may be needed to avoid severe vine water stress occurring in some vintages and soils with low holding capacity. The aim of this work was to evaluate the effects of soil recharge irrigation in pre-sprouting and summer irrigation every week (30 % ETO) from the pea size state until the end of ripening (RP) compared to exclusively summer irrigation every week (R) in the same way that RP, on must volatile composition at harvest.

Improvement of the red wine AOC Grignolino d’Asti typicality using some technological innovations

L’AOC Grignolino d’Asti (20000 hl environ de production) est un vin de la province de Asti, produit avec le raisin rouge du cépage de même nom originaire du Piémont (Nord-Ouest d’Italie).

Sustainablity of vineyards in the Priorat region (NE Spain)

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.19.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...

How different SO2 doses impact amino acid and volatile profile of white wines

Sulphur dioxide (SO2) is a well-established preservative in the wine industry. Its ability to act in different stages of the process as an antioxidant and an antiseptic as main characteristics makes it versatile. However, the need for its reduction or even its replacement has been increasing by the regulatory authorities as well as by the final consumer. To understand the impact of SO2 during ageing on volatile organic compounds (VOCs) and amino acids (AAs) profiles, two white wines (one varietal and one blend) were aged under the same conditions, in the presence of different doses of SO2. After fermentation (t=0), 0, 30, 60, 90 and 120 mg/L of SO2 were applied, wines were kept over lees for 3 months (t=3), then were bottled after 3 (t=6) and 9 (t=12) months.

POTENTIAL DEACIDIFYING ROLE OF A COMMERCIAL CHITOSAN: IMPACT ON PH, TITRATABLE ACIDITY, AND ORGANIC ACIDS IN MODEL SOLUTIONS AND WHITE WINE

Chitin is the main structural component of a large number of organisms (i.e., mollusks, insects, crustaceans, fungi, algae), and marine invertebrates including crabs and shrimps. The main derivative of chitin is chitosan (CH), produced by N-deacetylation of chitin in alkaline solutions. Over the past decade, the OIV/OENO 338A/ 2009 resolution approved the addition of allergen-free fungoid CH to must and wine as an adjuvant for microbiological control, prevention of haziness, metals chelation and ochratoxins removal (European Commission. 2011). Despite several studies on application of CH in winemaking, there are still very limited and controversial data on its interaction with acidic components in wine (Colan-gelo et al., 2018; Castro Marin et al., 2021).