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Food Chem. 2017 Oct 1;232:413-424. doi: 10.1016/j.foodchem.2017.03.163. Epub 2017 Mar 31.

The contribution of wine-derived monoterpene glycosides to retronasal odour during tasting.

Author information

1
The Australian Wine Research Institute, P.O. Box 197, Glen Osmond (Adelaide), SA 5064, Australia; School of Pharmacy and Medical Sciences, The University of South Australia, G.P.O. Box 2471, Adelaide, SA 5001, Australia. Electronic address: mango.parker@awri.com.au.
2
The Australian Wine Research Institute, P.O. Box 197, Glen Osmond (Adelaide), SA 5064, Australia.
3
The Australian Wine Research Institute, P.O. Box 197, Glen Osmond (Adelaide), SA 5064, Australia; School of Pharmacy and Medical Sciences, The University of South Australia, G.P.O. Box 2471, Adelaide, SA 5001, Australia.

Abstract

This study investigated the sensory significance of monoterpene glycosides during tasting, by retronasal perception of odorant aglycones released in-mouth. Monoterpene glycosides were isolated from Gewürztraminer and Riesling juices and wines, chemically characterised and studied using sensory time-intensity methodology, together with a synthesised monoterpene glucoside. When assessed in model wine at five times wine-like concentration, Gewürztraminer glycosides and geranyl glucoside gave significant fruity flavour, although at wine-like concentrations, or in the presence of wine volatiles, the effect was not significant. Gewürztraminer glycosides, geranyl glucoside and guaiacyl glucoside were investigated using a sensory panel (n=39), revealing large inter-individual variability, with 77% of panellists responding to at least one glycoside. The study showed for the first time that grape-derived glycosides can contribute perceptible fruity flavour, providing a means of enhancing flavour in wines, and confirms the results of previous studies that the effect is highly variable across individuals.

KEYWORDS:

Flavour; GC–MS; Glycosides; LC–MS; Monoterpenes; Sensory; Time intensity; Wine

PMID:
28490092
DOI:
10.1016/j.foodchem.2017.03.163
[Indexed for MEDLINE]

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