Terroir 1996 banner
IVES 9 IVES Conference Series 9 Les activités peroxidasiques du raisin de quelques cépages de Roumanie

Les activités peroxidasiques du raisin de quelques cépages de Roumanie

Abstract

Les enzymes d’oxydation (polyphénoloxydase, peroxydase) des raisins sont d’origine génétique dépendantes des facteurs climatiques et agrotechniques (Sapis et al, 1983). Dans le processus technologique de l’obtention du moût de raisins, ces enzymes catalysent l’oxydation de certains composés phénoliques naturellement présents dans le raisin, produisant ainsi des modifications indésirables de la couleur et de l’arôme du vin. L’activité peroxydase pendant la maturation des raisins et l’élevage des vins a été moins étudiée par rapport à celle de la polyphénoloxydase (Sapis et al., 1985) ce qui nous a incité à réaliser ce travail. Les recherches conduites pendant la période 1990-1995 à l’Institut de Recherches Viticoles et Oenologiques Valea Calugareasca ont suivi l’activité peroxydase, d’une part pendant la maturation des raisins de cépages blancs et noirs, d’autre part dans des raisins mûrs. Parallèlement l’influence de certains facteurs (pH, S02, température) sur l’activité de la peroxydase des raisins a été étudiée.

DOI:

Publication date: March 25, 2022

Issue: Terroir 1996

Type : Poster

Authors

MARIA AVRAMESCU (1), MANUELA VARGA (1), ALINA AVRAMESCU (2)

(1) Institut de Recherches Viticoles et Oenologiques Valea Calugareasca
2040, dép. Prahova, Roumanie
(2) Laboratoire d’analyses, “Larex”. Bucarest Soseaua Vitan-Bârzesti, nr. 11, Roumanie

Tags

IVES Conference Series | Terroir 1996

Citation

Related articles…

Vino e paesaggio: materiali per il governo del territorio vitivinicolo. Il piano regolatore delle città del vino

S’intende per Piano Regolatore delle Città del Vino la metodologia per redigere la parte strutturale dello strumento comunale di governo del territorio. Parliamo, infatti, del principale strumento comunale di governo del territorio, così come è venuto maturando nella riflessione delle Città del Vino, strumento che si misura con la sfida di governare tutto il territorio in modo coerente e sostenibile, a partire dal riconoscimento del valore del “sistema vigneto” e della sua intrinseca fragilità.

CONTRIBUTION OF VOLATILE THIOLS TO THE AROMA OF RIESLING WINES FROM THREE REGIONS IN GERMANY AND FRANCE (RHEINGAU, MOSEL, AND ALSACE)

Riesling wines are appreciated for their diverse aromas, ranging from the fruity fresh characters in young vintages to the fragrant empyreumatic notes developed with aging. Wine tasters often refer to Riesling wines as prime examples showcasing terroir, with their typical aroma profiles reflecting the geographical provenance of the wine. However, the molecular basis of the distinctive aromas of these varietal wines from major Riesling producing regions in Europe have not been fully elucidated. In this study, new lights were shed on the chemical characterization and the sensory contribution of volatile thiols to Riesling wines from Rheingau, Mosel, and Alsace. First, Riesling wines (n = 46) from the three regions were collected and assessed for their aroma typicality by an expert panel.

Study of the “Charentes terroir” for wine production of Merlot and Sauvignon: method, installation of the experimental device, first results

Cognac vineyard is mainly dedicated to brandy production. Within the vineyard restructuring context, one part is turned over wine varieties for wine production (about 1,500 ha planted from 1999 to 2005). Today, the new wine producers need technical references about qualitative potential of the « Charentes Terroir », varieties and adapted vineyard management.
In order to answer to this professional request, an observatory of 18 plots of Merlot and 12 plots of Sauvignon have been laid out since 2003 and 2004 on various kinds of pedoclimate.

Methyl jasmonate versus nano methyl jasmonate: effects on anthocyanins mature evolution in monastrell grapes

The climate change is afecting particulary to the South of Spain, with high temperatures. It is important to develop new strategies in order to mantain the quality of wines

Effect of row direction in the upper part of the hillside vineyard of Somló, Hungary

Hillside vineyards have a great potential to produce world class wines. The unique microclimate lead to the production of rich, flavory wines.