IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Perception of Rose Oxide Enantiomers, Linalool and α-Terpineol to Gewürztraminer Wine Aroma

Perception of Rose Oxide Enantiomers, Linalool and α-Terpineol to Gewürztraminer Wine Aroma

Abstract

Monoterpenes are important aroma compounds in white wines. Many monoterpenes are chiral and the chiral forms have different aroma qualities. Rose oxide is an important chiral compound found in Gewuztraminer wines. The enantiomers of the chiral rose oxide are found to vary in wines. The difference sin the enantiomeric ratios have the potential to alter wine aroma, as well as change aroma qualitities when in combination with other monoterpenes. The aim of this study was to evaluate rose oxide enantiomers at different ratios and the interaction of rose oxide with linalool and alpha-terpineol. Twelve compound combinations were tested in a dearomatized wine with diffferent ratios of rose oxide and combinations with linalool and alpha-terpineol. Triangle tests, check-all-that-apply (CATA) and descriptive analysis were used to evaluate the aroma of the wine treatments. Results show that the ratio of rose oxide enantiomers did alter aroma. Additionally, descriptive analysis showed that the rose oxide enantiomer ratios altered aroma when linalool and alpha-terpineol were at low and medium concentrations, influenceing grapefruit, lychee and stone fruit aromas. At high concentrations, linalool and alpha-terpineol mask rose oxide, resulting in wines described as tropical fruit, ginger, rose and honeysuckle. Understanding how monoterpenes alter aroma perception of white wines when at different combinations and concentrations is important to achieve desired wine qualities and helps provide information on interpreting flavor chemistry information

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Tomasino Elizabeth¹, Chigo-Hernandez Mildred Melina¹ and DuBois Aubrey¹

1Oregon State University

Contact the author

Keywords

check-all-that-apply, triangle test, monoterpenes, chiral, descriptive analysis

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Assessing and mapping vineyard water status variability using a miniaturized nir spectrophotometer from a moving vehicle

In the actual scenario of climate change, optimization of water usage is becoming critical in sustainable viticulture. Most of the current approaches to assess grapevine water status and drive irrigation scheduling are either destructive, time and labour consuming and monitor a small, limited number of plants. This work presents a novel methodology using a contactless, miniaturized, low-cost NIR spectrometer to monitor the vineyard water status variability from a moving vehicle, to provide reliable information towards precision irrigation.

Induction of polyphenols in seedlings of Vitis vinifera cv. Monastrell by the application of elicitors

Contamination problems arising from the use of pesticides in viticulture have raised concerns. One of the alternatives to reduce contamination is the use of elicitors, molecules capable of stimulating the natural defences of plants, promoting the production of phenolic compounds (PC) that offer protection against biotic and abiotic stress. Previous studies on Cabernet-Sauvignon seedlings demonstrated that foliar application of elicitors methyl jasmonate (MeJ) and benzothiadiazole (BTH) increased proteins and PC involved in grapevine defence mechanisms. However, no trials had been conducted on Monastrell seedlings, a major winegrape variety in Spain.

Linking soil C cycling and microbial diversity under regenerative management in Northern California (USA) vineyards

Regenerative agriculture (RA) practices aim to minimize soil disturbance, keep soil covered, maintain living roots underground, and integrate livestock to improve soil health and sustainability.

Cover crops sown in the inter-rows shape the weed communities in three vineyards across Italy

The use of cover crops (CCs) is widely proposed as an alternative to traditional soil management in vineyards to exploit a wide range of ecosystem services. The presence of a CC in the inter-row space is known to control spontaneous vegetation in vineyards, primarily through the biomass of the sown crop, which competes with other spontaneous species for soil resources.

Volatile compounds production during ripening of cv. “Sangiovese” grapes from different terroir

“Sangiovese” (Vitis vinifera L. sativa cv. Sangiovese) is the main grape variety to be established in Italy, being the only country in Europe where this grape is commonly found.