GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2019 9 Climate change 9 Heat berry: the influence of abiotic factors on the composition of berries, must and wine in Vitis vinifera L. CV Riesling

Heat berry: the influence of abiotic factors on the composition of berries, must and wine in Vitis vinifera L. CV Riesling

Abstract

It has been known for a long time that altering microclimate affects fruit composition and wine quality. The research project Heat Berry focuses on future scenarios of the climate change regarding higher temperatures and the risk of increasing sun radiation to the fruit. Field experiments were conducted in 2015 and 2016 at an experimental site at Geisenheim (Germany) using Riesling (clone 198-25 grafted to rootstock SO4). The aim of this study was to investigate and separate the effect of higher temperature to the fruit and higher light exposure in the bunch zone. Therefore, an experimental setup was designed to increase temperature inside the bunch zone (up to max. 3 °C on average) as well as defoliation and shading to influence the light exposure of the bunches. In addition, some physiological parameters and maturity measurements (Brix, yeast available nitrogen, organic acids) were determined. Aroma measurements focused on monoterpenes, C13-Norisoprenoids and polyphenols in berries as well as in samples of small scale vinification. A special focus lies on the C13-norisoprenoid TDN (1, 1, 6-trimethyl-1, 2-dihydronaphthalene). It is mostly present in mellow, aging Riesling wines and associated with a petrol taint in the sensory perception. Whether the origin of TDN is connected to viticultural and abiotic factors like temperature or sun exposure will be discussed.

DOI:

Publication date: June 19, 2020

Issue: GiESCO 2019

Type: Article

Authors

BRANDT, Melanie (1); SCHEIDWEILER, Mathias (1); RAUHUT, Doris (2); PATZ, Claus-Dieter (3); ZORN, Holger (4); STOLL, Manfred (1)

(1) Hochschule Geisenheim University, Department of General & Organic Viticulture, Blaubachstraße 19, 65366 Geisenheim, Germany,
(2) Hochschule Geisenheim University, Department of Microbiology & Biochemistry, Von-Lade-Str. 1, 65366 Geisenheim, Germany
(3) Hochschule Geisenheim University, Department of Wine Analysis and Beverage Technology, Von-Lade-Str. 1, 65366 Geisenheim, Germany.
(4) Justus Liebig University Giessen, Institute of Food Chemistry and Food Biotechnology, Heinrich-Buff-Ring 58, 35392 Giessen, Germany

Contact the author

Keywords

 climate change, light exposure, Vitis vinifera, 1,1,6-trimethyl-1,2-dihydronaphthalene

Tags

GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Identification of 4-hydroxy-2-nonenal, a gamma nonalactone precursor in must and wine from Bordeaux cultivars

Various molecular compounds are responsible for the complex mixture of fragrances that give wine its aroma. In particular, the ‘cooked fruit’ aroma found in red wines from hot and/or dry vintages or from the vinification of late harvested grapes has been intensively investigated in recent years. Lactones and especially γ-nonalactone were found to be responsible for the ‘cooked fruit’

Aromatic profile of Savatiano Greek Grape Variety as affected by various terroirs in the PGI zone of Attica.

Regionality, frequently called terroir, is often used to market wines from different locations. Savatiano (Vitis Vinifera L.), is the dominant indigenous variety of the Mesogeia – Attiki region, reaching a percentage of 70% of the total vine cultivation, and being the most widely planted variety in Greece. In this context, this research focuses on the evaluation of the impact of different terroirs within the PGI Attiki zone on the aromatic profile of Savatiano.

The impact of different yeasts and harvest time on the wine quality of Beihong and Beimei (<I>V. vinifera x V. amurensis</I>)

Beihong and Beimei are two wine cultivars from ‘Muscat Hamberg’ (V. vinifera L.) and wild V. amurensis Rupr., which were released in China in 2008. Here,two enology practices were reported. Firstly, the impact of different yeasts including D254, GRE, K1, D21 and BDX on dry wine quality of Beihong and Beimei was investigated. For Beihong, among wines fermented by all yeasts, residual sugar content was the lowest, total anthocyanin and resveratrol contents were the highest in the wine by D254. However, the wine by D254 had lower titrable acid than those by the other yeasts except BDX.

Characteristics of ecological production of grape and wine in Prizren’s vineyard territory in Yugoslavia

Prizren’s vineyard territory-y assigned for ecological production of grapes and wine includes 1. 200 hectares of vineyard located in five separate localities which belongs to the P KB “Kosovo vina”, Mala Krusa in Prizren. Division of vineyard territory in zones was carried out in 1974. Pertaining to the vineyards, the climate and soil conditions have been studied and determined as well as topographie establishing of vineyard boundaries.

Determination of steviol glycosides in wine by HPLC

The SCL laboratory in Bordeaux is one of the two official control laboratories for wine and wine products in france, under the authority of the ministry of finance and two of its general directorates: the DGCCRF (directorate general for competition, consumer affairs and fraud control) and the DGDDI (directorate general of customs and excise duties). In this capacity, it verifies the regulatory compliance of wines and investigates any possible falsifications or fraud. Steviol glycosides are natural sweeteners that are not authorized as additives in wine.