Macrowine 2021
IVES 9 IVES Conference Series 9 How to improve the mouthfeel of wines obtained by excessive tannin extraction

How to improve the mouthfeel of wines obtained by excessive tannin extraction

Abstract

AIM: Red wines felt as astringent and bitter generally show high content of tannins due to grape phenolic compounds’ extraction in the maceration process.  Among different enological practices, mannoproteins have been shown to improve the mouthfeel of red wines (1) and the color (2,3). In this work, we evaluated the effect of mannoproteins on the mouthfeel profile of Sangiovese wines obtained by excessive tannin extraction.

METHODS: Extended maceration (E), marc press (P), and free-run (F) wines were aged three and six months in contact with three different mannoproteins (MP, MS, MF) at 20 g/hL. Phenolic analyses comprised: total anthocyanins, low and high molecular weight proanthocyanidins. The color was studied by color parameters, CIELab coordinates, and pigmented polymers. The wines’ sensory characteristics: astringency subqualities (silk, velvet, dry, corduroy, adhesive, aggressive, hard, soft, mouth-coat, rich, full-body, green, grainy, satin, pucker, persistent), taste, aroma, and odor, were evaluated.

RESULTS: Pigmented polymer formation was differently promoted in all wines. Multi Factorial Analysis revealed significant correlations between subqualities, color parameters, and phenolic compounds for each wine. Some mouthfeel attributes seem to depend on the equilibrium between anthocyanins and pigmented polymers and then on anthocyanins and proanthocyanidins ratio. CONCLUSIONS: Mannoproteins showed a different effect on mouthfeel depending on the wine. The choice of treatment for extended maceration, free-run, and marc press wines can also be made considering results on color stability. The aging on mannoproteins can represent a way to improve the mouthfeel of wines highly rich in tannins.

DOI:

Publication date: September 24, 2021

Issue: Macrowine 2021

Type: Article

Authors

Alessandra Rinaldi, Alliette GONZALEZ, Luigi MOIO, Angelita GAMBUTI

Department of Agricultural Sciences, University of Napoli “Federico II”- Enology Sciences Section, Viale Italia, 83100, Avellino, Italy Biolaffort, 126 Quai de la Souys, 33100 Bordeaux, France.

Contact the author

Keywords

mannoprotein, astringency, subquality, maceration, color, sensory analysis

Citation

Related articles…

Identification of a stable epi-allele associated with flower development and low bunch compactness in a somatic variant of Tempranillo Tinto

Grapevine cultivars are vegetatively propagated to preserve their varietal characteristics. However, spontaneous somatic variations that occur and are maintained during cycles of vegetative growth offer opportunities for the natural improvement of traditional grape cultivars. One advantageous trait for winegrowing is reduced bunch compactness, which decreases the susceptibility to pests and fungal diseases and favor an even berry ripening.

«Nektar» -the new red variety wine grape aromatic high quality

The multi-annual study of the International Genetic Bank of the Grape Vine has shown that red varieties are enough, but the red varieties that produce high-quality red wine are minimal.

Influenza dell’esposizione del vigneto sulla maturazione dell’uva

Lo studio è stato condotto in vigneti commerciali di Vitis vinifera cv Nebbiolo localizzati in Piemonte, Italia del Nord-Ovest, intorno alla sommità di una collina. L’obiettivo dello studio è stato di determinare come l’esposizione del vigneto possa influenzare il comportamento vegetativo della vite, il manifestarsi delle fasi fenologiche, e la cinetica di maturazione dell’uva con particolare riguardo all’accumulo di antociani e flavonoli.

Testing the pathogen e-learning and field training course on grapevine virus knowledge and management

One of the reasons of the spread of grapevine virus diseases in
vineyards around the world is the lack of knowledge by the main actors of the wine sector. To face this problem, five partners worked together to develop the PAThOGEN project, a training program aimed to improve grapevine virus knowledge and management. The partnership gathers one French technical center (IFV), one Spanish university (USC), one Italian applied research center (CREA), one Spanish foundation
specialized in training and technology transfer (FEUGA) and one Italian SME specialized in the development of informatics tools and in knowledge transfer (HORTA).The objectives of PAThOGEN are: (i) to develop and
maintain a high-quality work-based Vocational and Education Training program, (ii) to improve the skills of professionals of the wine sector.

Barrels ad-hoc: Spanish oak wood classification by NIRs 

The wooden barrel is a key factor in enology, since wine chemical composition and sensory properties changes significantly in contact with the barrel[1]. Today’s highly competitive market constantly demands new differentiated products and wineries search innovations continuously.
Wood selection is crucial: barrels stability to keep constant their contribution and the result on products, and additional and differentiated wood contributions to impact their new products. Oak wood selection has traditionally been carried out using parameters such as specie, location and grain, however, it goes one step further nowadays. Large cooperage work with non-destructive techniques that allow classifying oak wood quickly and easily according to their organoleptic contribution[2].