IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Non-targeted analysis of C13-norisoprenoid aroma precursors in Riesling

Non-targeted analysis of C13-norisoprenoid aroma precursors in Riesling

Abstract

Significant wine aroma can be formed from non-volatile precursors that are linked to sugars, including but not limited to grape-derived monoterpene and C13-norisoprenoid glycosides. Most studies aiming to profile glycosidic flavour compounds in grapes and wine are performed by the analysis of hydrolytically liberated aglycones, either enzymatically or through acid hydrolysis, mainly due to a lack of analytical standards, diversity of glycosides, and their small concentrations. However, aglycone analysis alone can not reveal the full
complexity of precursors and the structural rearrangements of aglycones during and post-release, as it has been repeatedly reported for TDN and other related C13-norisporenoids that arise slowly during wine ageing.
The main objective of this study was to develop an analytical strategy to profile the potential presence of putative lead candidates and the presence of unknown precursors involved in the formation of the potent aroma compound, TDN, in Riesling wine. To uncover the structural complexity of TDN precursors, we firstly utilised a non-targeted metabolomics
approach (using HPLC with QTOF mass spectrometry) on Riesling grape grown under varied light conditions to determine potential candidates; putative TDN precursors ex wine were then further characterised by tandem mass spectrometry (HPLC-QqQ-MS/MS).
In addition to previously reported precursors, multiple glycosides were found in Riesling wine made from grapes grown under different light regimes which represent promising candidates likely to contribute to the formation of TDN. The results demonstrate that the combined HPLC-MS methods are effective for confirming and significantly expanding the
knowledge about the precursor pools involved in the formation of potential aroma compounds in wine. At the same time, this analytical strategy can help to develop a greater understanding of the environmental influences that can drive the formation of individual flavour precursors.

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Grebneva Yevgeniya1, Herderich Markus¹, Rauhut Doris², Nicolotti Luca1 and Hixson Josh¹

¹The Australian Wine Research Institute
²Hochschule Geisenheim University

Contact the author

Keywords

Non-targeted analysis, aroma precursors, C13-norisoprenoids, glycosides, Riesling

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

The chemical composition of disease resistant hybrid grape cultivars and its impact on wine quality: an exploratory enquiry into sustainable wines

Disease resistant hybrid grape cultivars are now allowed in a number of EU wine PDOs, and are also accepted in a number of countries outside the EU. There is increasing interest in diseases resistant hybrid grape cultivars (RHGCs) because they allow for the production of healthy, high quality grapes with limited use of pesticides and the associated environmental and public health

Read More

Effect of ozone treatments in wine production on colour traits, volatile composition, and sensory characteristics of young and short-term aged white wines

The main aim of WiSSaTech project (PRIN P2022LXY3A),supported by the Italian Ministero dell’Università e della Ricerca and European Union-NextGenerationEU, is to investigate eco-friendly and safe alternatives to sulphur dioxide (SO2) in wine production.

Read More

Oenological potential of indigenous greek grape varieties and their clones

Vine clone selection aims at the survival of clones with particularly desireable attributes for the production of high quality wines. The purpose of this research was to study the enological potential of the clones of Greek indigenous grape varieties over two vintages, 2018 and 2019.
METHODS: Two clones of the white grape varieties Moschofilero (E26 and E27), Assyrtiko (E11 and 16), Roditis (25E16 and 02E1E21) and two clones of the red grape varieties Xinomavro (19 and E2E30) and Agiorgitiko (03E40 and 41E47) were vinified under the same protocol for the white wines and common for the red wines in 2018 and 2019. The resulting products were studied for several enological parameters such as alcohol content, volatile acidity, pH, total phenolics, anthocyanins and tannins for the red wines, as well as browning tests for the white wines. The aroma profile of these ten samples was investigated through sensory analysis with intensity rating of individual attributes on a five-point scale by a trained panel.

Read More

Mathematical modeling of fermentation kinetics: a tool to better understand interactions between Torulaspora delbrueckii and Saccharomyces cerevisiae in mixed cultures

Nowadays the use of Torulaspora delbrueckii is more and more common in winemaking. However, its behavior in presence of Saccharomyces cerevisiae is not always predictable.

Read More

Phototropic and geotropic shoot orientation: effect on physiological, vegetative and reproductive parameters

[English version below]

On a étudié l’effet de l’orientation des rameaux sur les paramètres physiologiques, végétatifs et reproductif durant deux saisons de croissance (2002/2003 et 2003/2004) dans la région de Stellenbosch dans une vignoble du cépage Merlot sur 99R conduite en espalier et taillé à cordon coursonné. Les vignes étaient espacées 2.7 x 1.5 m.

Read More