Terroir 2014 banner
IVES 9 IVES Conference Series 9 Corvina berry morphology and grape composition as affected by two training system (Pergola and Guyot) in a context of climate change scenario

Corvina berry morphology and grape composition as affected by two training system (Pergola and Guyot) in a context of climate change scenario

Abstract

The Valpolicella area (Veneto Region, Italy) is famous for its high quality wines: Amarone and Recioto, both obtained from partial post-harvest dehydrated red grapes. The main cultivars used for these wines are Corvina and Corvinone. In this Region hundreds of years ago a particular training system (Pergola, cordon/cane with horizontal shoot-positioning) was developed. In the last 20 years the Guyot have been introduced in the area; now Pergola and Guyot are equally widespread in the Valpolicella area. In two different environmental conditions (hill and floodplain) two vineyards, one for each type of training system, were studied along two years (2011-2012). 

Different canopy architectures determined differences in canopy density and bunch microclimate. Point quadrat analysis (PQA), photosynthetically active radiation (PAR) in the fruiting zone and berry temperature measurements were performed to evaluate the differences between the two training systems. The different leaf layer number (LLN) between the two trellis determined a different PAR reaching the bunch that resulted in a different berry temperature. Pergola showed a higher LLN and a consequent lower berry temperature compared with Guyot trellis. 

The ThS of Pergola always showed a thinner skin compared with the Guyot. Tartaric acid content was significantly affected by the training system and resulted higher in the Pergola trellis. The ANT was higher where maximum berry temperature was lower, i. e. in intracanopy bunch of Pergola. Ew and TSS content were not affected by both the position in the canopy and the training system; just a year effect was founded. This study highlight the effect of the training system on some important grape parameters in a context of climate change, also for the post-harvest dehydration process of Corvina.

DOI:

Publication date: August 18, 2020

Issue: Terroir 2014

Type: Article

Authors

Fabrizio BATTISTA (1), Despoina PETOUMENOU (1), Federica GAIOTTI (1), Lorenzo LOVAT (1), Duilio PORRO (2), Diego TOMASI (1)

(1) Centro di Ricerca per la Viticoltura, Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Viale 28 Aprile 26, Conegliano (TV), Italy 
(2) Fondazione Edmund Mach, Centro di Trasferimento Tecnologico, via Mach 1, S.Michele a/A (TN), Italy

Contact the author

Keywords

training system, Pergola, post-harvest dehydration, epicuticular wax, skin thickness, Corvina

Tags

IVES Conference Series | Terroir 2014

Citation

Related articles…

Caractéristiques physiques et agronomiques des principaux terroirs viticoles de l’Anjou (France). Conséquences pour la viticulture

Une étude conduite dans le cœur du vignoble A.O.C. angevin, sur une surface d’environ 30.000 ha, a permis de caractériser et cartographier finement (levé au 1/12.500)

Red wine astringency: correlations between chemical and sensory features

Astringency is a crucial sensory attribute typically described as the drying and/or puckering sensation occurring after the consumption of tannin-rich foods and beverages. In this study, thirty-seven red wines from different varieties, origins and styles were evaluated, analyzing both chemical and sensory features. Principal Component Analysis was used for dimensionality-reduction and for correlating selected chemical parameters against astringency. The results showed that tannin content was the most important chemical parameter influencing overall astringency but more clearly the dryness sub-quality, followed by pH, titratable acidity and alcohol content.

Preliminary results of water status and metabolite content of three new crossbreed winegrape genotypes

This study presents the preliminary results obtained in 2022, of the evaluation of three new crossbreed winegrape genotypes and their parental varieties, grown under controlled irrigation (60% ETc) and rainfed conditions in a wine-growing area with scarcity of water and high temperatures (Murcia, southeast Spain). The genotypes MC16 and MC80 were obtained from crosses between the varieties ‘Monastrell’ and ‘Cabernet Sauvignon’, and MS104 from crosses between ‘Monastrell’ and ‘Syrah’ [1]. The objective of this study was to analyse the physiological response and vegetative development of the 6 genotypes under the two irrigation conditions, and to study their effect on the content of soluble sugars and chlorophyll in the leaf.

Phenolic extraction and mechanical properties of skins and seeds during maceration of four main italian red wine grape varieties

AIM: Red grape varieties are characterized by different phenolic contents (prominently tannins and anthocyanins) found in skins and seeds.

Exploring the influence of terroir on the sensorial and aroma profiles of wines – An application to red wines from AOC Corbières

The aromatic profile of a wine is the result of volatile molecules present in grapes (varietal or primary aromas) and those produced during the winemaking process of fermentation (secondary aromas) and during wine aging (tertiary aromas).