Terroir 2006 banner
IVES 9 IVES Conference Series 9 Free amino acid composition of must from 7 Vitis vinifera L. cv. in Latium (Italy)

Free amino acid composition of must from 7 Vitis vinifera L. cv. in Latium (Italy)


Free amino acid concentrations in must of 7 Vitis vinifera cultivars (Cabernet Franc, Syrah, Merlot, Montepulciano, Sangiovese, Cesanese d’Affile, Carmenere) grown in the Latium region (Italy) were monitored from 2003 to 2005. The cultivars were located in a homogeneous soil and climatic zone and with the same training system (Cordon Spur). The influence of climate was assessed with year-to-year variations of maximum and minimum temperatures and rainfall. The amino acids were compared individually to show year-to-year variations. The concentrations of individual amino acids differed considerable between years, whereas the amino acids profile did not differ significantly from one year to another in all 7 cultivars studied. Arginine, proline, varied between years, while proline: arginine ratio did not change. Arginine, proline, proline: arginine ratio, total free α–amino acid and total free α–amino N concentration were not correlated with soluble solids concentration at harvest. The sum total of amino acids in musts differed significantly from one variety to another and was used as an index to differentiate between varieties from the same area.


Publication date: December 22, 2021

Issue: Terroir 2006

Type: Article


Francesca CECCHINI (1), Massimo MORASSUT (1) and Emilia GARCIA MORUNO (2)

(1) CRA Istituto Sperimentale per l’Enologia Via Cantina Sperimentale, 00049 Velletri (Roma), Italy
(2) CRA Istituto Sperimentale per l’Enologia Via Pietro Micca, 35, 00141 Asti, Italy

Contact the author


cultivar, must, amino nitrogen


IVES Conference Series | Terroir 2006


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.