Profile of Stilbenes and Other Phenolics in Fanagoria White and Red Russian Wines.

Andrey R Suprun,Konstantin V Kiselev,Alexey P Tyunin,Alexandra S Dubrovina

doi:10.3390/metabo11040231

Andrey R Suprun, Konstantin V Kiselev + Show 2 more

Open Access

https://doi.org/10.3390/metabo11040231

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Abstract

Grapes and wines represent the most important source of edible stilbenes and other phenolic metabolites, which demonstrate a wide range of valuable biological activities. However, there is no information about the profile and content of phenolic compounds in Russian wines. We firstly analyzed phenolics (stilbenes, phenolic acids, and flavonols) in some representatives of Russian wines, including eleven red and seven white Russian wines from Fanagoria, Krasnodarsky Territory. The Russian red wines contained six stilbenes (trans-resveratrol, cis-resveratrol, trans-, cis-piceid, trans-piceatannol, δ-viniferin), while the white wines contained only five stilbenes (cis-resveratrol, trans-, cis-piceid, trans-piceatannol, trans-resveratrol). More than a half of the total stilbenes in the wines (65% of all stilbenes) were presented by trans-piceid and cis-piceid, while trans-resveratrol reached 16% of all the stilbenes. The red wines also contained six phenolic acids and six flavonols, while the white wines contained six phenolic acids and only three flavonols. Myrecitin-3-O-glucoside, quercetin-3-O-glucoside, and myricetin were the major flavonols in the red wines, while dihydroquercetin-3-O-rhamnoside was the major flavonol in the white wines. The red wines contained markedly higher amounts of stilbenes, phenolic acids, and flavonols than the white wines. Thus, the data showed that young red Russian Fanagoria wines represent a rich source of phenolic compounds. The study also revealed that younger wines were more abundant in phenolics, and wine storage for six months in the dark at +10 °C led to a decrease in the total content of phenolics, primarily monomeric stilbenes and quercetin-3-O-glucoside and quercetin flavonols.

Highlights

Plants produce a wide range of valuable secondary metabolites, such as alkaloids, terpenoids, natural phenols, etc
Our results showed a decrease in the content of phenolic acids and flavonols during wine storage (Table S3), except for myricetin and quercetin-3-Oglucuronide content, the amount of which, on the contrary, significantly increased by
This study firstly described the profile and content of stilbenes and other phenolics in Russian wines

Summary

Introduction

Plants produce a wide range of valuable secondary metabolites, such as alkaloids, terpenoids, natural phenols, etc. Other phenolic compounds are known for their valuable biologically active properties and health-promoting effects. Flavonols are bioactive compounds found in a variety of vegetables and fruits, and their anti-cancer and anti-microbial effects are well known [11,12,13]. A higher stilbene content is a feature of red wines, while their content in white varieties is much lower (Table 1). Studying the contents of stilbenes and other phenolics in red and white wines is important for wine production of high nutritional value. Using high-performance liquid chromatography with high-resolution mass spectrometry (HPLCHRMS), we first analyzed the profile and content of phenolics (stilbenes, phenolic acids, and flavonols) in eleven red and seven white Russian wine varieties

Phenolic Levels in White and Red Fanagoria Wines

Wine Samples

Findings

Conclusions