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…

Terroir effects on the response of Tempranillo grapevines to irrigation in four locations of Spain: grape and must composition

This work discusses the effects of soil and weather conditions on the grape composition of cv. Tempranillo in four different locations of Spain, during the 2008-2011 seasons.

Read More

Projections of vine phenology and grape composition of Tempranillo variety In Rioja DOCa (Spain) under climate change

Aims: Some of the most direct effects of climate variability on grapevines are the changes in the onset and timing of phenological events and in the length of the growing season, which may affect grape quality. The aim of this research was to analyze the projected changes in vine phenology and on grape composition of the Tempranillo variety in Rioja DOCa under different climate change scenarios.

Read More

Enhancing table grape production: addressing challenges and opportunities for sustainability and quality improvement

Table grapes, being consumed as fresh, raisins, and transformed products are among the most appreciated fruits worldwide. Its popularity is increasing also due to its organoleptic and nutritional qualities that meet the consumers’ interest in healthier foods. Recent data from International Organization of Vine and Wine (OIV) revealed that table grape production has doubled in the last twenty years, and varietal availability has increased thanks to the several breeding programs.
To maintain the socio-economic impact of this sector, new challenges need to be addressed.

Read More

Is early defoliation a sustainable management practice for mediterranean vineyards? Case studies at the portuguese lisbon winegrowing region

Context and purpose of the study ‐ Recently early defoliation (ED) has been tested in several high‐ yielding grapevine varieties and sites aiming at reducing cluster compactness and hence, regulating yield and susceptibility to botrytis bunch rot infection. The reported results have been generally positive, encouraging growers to use this canopy management technique as an alternative for replacing the conventional time‐consuming cluster thinning and, simultaneously, as a sustainable practice to reduce the use of fungicides. However, ED increases berry sunburn risks and/or can induce carry‐over effects on vigor and node fruitfulness as shown in the two case studies reported in this work.

Read More

La zonazione della Franciacorta: il modello viticolo della DOCG

La Franciacorta è una piccola regione collinare della provincia di Brescia. Il territorio è molto eterogeneo sia dal punto di vista geologico, che geomorfologico e pedologico. Circa 1.000 ettari sono destinati alla produzione di uve Chardonnay, Pinot bianco e Pinot nero per il vino Franciacorta ottenuto unicamente utilizzando la lunga fermentazione naturale in bottiglia.

Read More