Macrowine 2021
IVES 9 IVES Conference Series 9 Distribution analysis of myo and scyllo-inositol in natural grape must

Distribution analysis of myo and scyllo-inositol in natural grape must

Abstract

As it is well known, myo and scyllo-inositol are two characteristic sugars of grape must and, for this reason, their quantification has been proposed to control the authenticity of the concentrated and rectificated grape must. Indeed, these polyalcohols, which originate in the grape berries and are not retained by the resins used for the concentration process, are not naturally present in other commercial sugars from different botanical origins [1]. However, up to now, no study has exhaustively investigated the concentration variability of myo and scyllo-inositol in natural grape musts and for this reason in the definition of rectified concentrated grape must the only presence of meso-inositol is prescribed without reporting any minimum limit [2]. In this work, 200 authentic Italian grape musts were collected and the concentration of the two polyalcohols was determined. The sampling was done during 2019 and 2020 harvest in 17 different Italian Regions (Abruzzo, Basilicata, Calabria, Campania, Emilia Romagna, Friuli Venezia Giulia, Lazio, Lombardy, Marche, Piedmont, Puglia, Sardinia, Sicily, Tuscany, Trentino-Alto Adige, Umbria, and Veneto). A total of 85 different grape varieties were considered to describe the natural variability. Quantification of myo and scyllo-inositol was performed by gas chromatography after silylation. The method used was obtained by modifying the official method RESOLUTION OIV-OENO 419C-2015 concerning the quantification of myo and scyllo -inositol in rectified concentrated grape musts [3]. The aim of our work was to create an extensive data bank and to investigate the impact of the geographical origin, grape variety and the different year of harvest on the concentration of myo and scyllo-inositol. Furthermore, it has been verified the influence of the process to obtain the concentrated grape must starting from the natural one on the content of the two polyalcohols.

DOI:

Publication date: September 10, 2021

Issue: Macrowine 2021

Type: Article

Authors

Mauro Paolini

Fondazione Edmund Mach – San Michele all’Adige (Italy),Letizia, ALLARI, Unione Italiana Vini – Verona (Italy) Loris, TONIDANDEL, Fondazione Edmund Mach – S. Michele all’Adige (Italy) Matteo, PERINI, Fondazione Edmund Mach – S. Michele all’Adige (Italy) Katia, GUARDINI, Unione Italiana Vini – Verona (Italy) Roberto, LARCHER, Fondazione Edmund Mach – S. Michele all’Adige (Italy)

Contact the author

Keywords

characterization, myo-inositol, scyllo-inosytol, grape must, data bank

Citation

Related articles…

Isolation, biofilm formation and control of the wine spoilage yeast Brettanomyces bruxellensis

Brettanomyces bruxellensis, commonly referred to as “Brett,” is one of the most notorious microorganisms implicated in wine spoilage. This yeast species has developed a noteworthy resistance to sulfur dioxide, a widely used preservative in winemaking, prompting the wine industry to seek new antimicrobial agents.

Read More

Système de Classification Climatique Multicritères (CCM) Géoviticole

Le travail concerne en premier la méthodologie de caractérisation du climat des vignobles, à l’échelle du macroclimat des régions viticoles du monde (géoviticulture). Trois indices climatiques viticoles synthétiques

Read More

Soil Temperature and Climate Change: Implications for Mediterranean Vineyards 

More frequent and extreme temperatures and droughts pose challenges to the wine sector in Mediterranean Europe. Soil is crucial to sustain the equilibrium of ecosystems, economic growth and people’s prosperity worldwide. In viticulture, soils are a major component of the terroir and do influence vine’s growth, yield and berry composition. Soil temperature (ST) affects soil´s physical, chemical and biological processes and also crop growth. The impact of ST becomes even stronger when dealing with row crops such as grapevine, when considering the increased exposition to radiation. However, the impact of ST on crop performance remains poorly described, especially for extreme climatic conditions.

Read More

Importance des propriétés optiques de la surface du sol sur le microclimat de la vigne. Répercussions de l’usage d’un revêtement de sol réfléchissant sur la composition des moûts et sur la qualité du vin

Cette recherche a eu pour but l’étude des effets d’un renforcement radiatif et thermique sur les zones inférieures de la canopée de la vigne (solarisation par des films ou des paillages réfléchissants installés sur le sol, sous les ceps), notamment l’étude de leurs conséquences sur la composition biochimique des moûts à la vendange et sur la qualité des vins.

Read More

Volatile Organic Compound markers of Botrytis cinerea infection in artificially inoculated intact grape berries

The addition of partially dehydrated grapes to enrich must composition for producing complex dry/sweet wines represents a traditional practice in several regions of the world. However, the environmental conditions of dehydration chambers may facilitate the infection of Botrytis cinerea Pers. by promoting disease and provoking large grape losses. B. cinerea attack can induce alterations in the profile of volatile organic compounds (VOCs), which could be detected by sensors specifically trained to detect infection/disease-related compounds. These sensors could facilitate the early detection of the infection, consequently allowing to adjust some dehydration parameters.

Read More