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 impact of branched chain and aromatic amino acids on fermentation kinetics and aroma biosynthesis by wine yeast Saccharomyces cerevisiae

One of the major determinants of wine quality is the aroma. Wine aroma is the human perception of the matrix of grape and yeast derived volatiles and their interaction that contribute to flavour wine. Most common are higher alcohols, ester and aldehydes. In previous studies the formation of characteristic volatile compounds have been linked to the metabolism of branched-chain and aromatic amino acids
(BCAAs) in synthetic grape must. Here we report on an investigation to assess the impact of the initial amino acid concentration on the production of aroma compounds by the industrial yeast VIN13 grown in both synthetic and real grape musts.

Read More

Effect of the shade generated by simulated solar panels in two row orientation on the physiology and productivity of Vitis vinifera L. cv. Malbec

Context and purpose of the study. In regions where grapevines are grown under irrigation, like most regions in Argentina, the wine industry should adopt more sustainable strategies and production systems towards a higher water use efficiency and a reduction in no-renewable energy consumption.

Read More

Genetic study of wild grapevines in La Rioja region

Since the mid-1980s, several surveys have been carried out in La Rioja to search for populations of the sylvestris grapevine subspecies (Vitis vinifera L. subsp. sylvestris Gmelin). The banks of the Ebro River and its tributaries (Alhama, Cidacos, Leza, Iregua, Najerilla, Oja and Tirón rivers), as well as the surrounding vegetation of their valleys have been covered. So far, all the populations found are alluvial, forming part of the riparian vegetation of the Najerilla (the first reported population in La Rioja [1]), Iregua, and the vicinity of Oja valleys.

Read More

Arsenic in soil, leaves, grapes and wines

The presence of arsenic in food and beverages creates concern because of the toxicity of this element, classified as carcinogenic in humans. The arsenic concentration in soil, vine leaves and berries

Read More

Enological characterization of mold resistant varieties grown in the Trentino Alpine Region

Among the different strategies used in vine growing to fight against mold diseases, it can be pointed out the hybridation of traditional grape varieties with others, presenting a genetic resistance to pathogen attack. The research in this field has been encouraged in recent years due to the increased concern about human safety and environmental pollution linked to the use of agrochemicals. This approach allows to limit the number of treatments and the type of active compounds used in vine management. The environment determines the pressure degree of the diseases on vines and the biologic response of the plant to their attack.

Read More