Adsorption and biotransformation of anthocyanin glucosides and quercetin glycosides by Oenococcus oeni and Lactobacillus plantarum in model wine solution.

A. Devi,Anu‐Appaiah Konerira Aiyappaa,A. Waterhouse

Published 2019 in The Journal of the Science of Food and Agriculture

ABSTRACT

BACKGROUND Anthocyanins and flavonols play a significant role in contributing to wine color and mouthfeel, and the interaction of malolactic fermentation with these compounds is not well known. Here we investigated the adsorption of these compounds by Oenococcus oeni and Lactobacillus plantarum. RESULTS Delphinidin-3-glucoside (D3G) was adsorbed the most, followed by malvidin-3-glucoside (M3G) and peonidin-3-glucoside (P3G) for both the bacterial species, while flavonols were not adsorbed. An increase in β-glycosidase activity suggested that this enzyme breaks down the anthocyanin glucosides, providing sugars for growth. An average decline of approximately 65% of enzyme activity in the presence of substantial residual sugar was observed. The specific metabolic rates was found to be dependent on the class of anthocyanin and species/ strain of the bacteria. Selective adsorption of anthocyanins and not the flavonol glycosides suggest that electrostatic interactions mediate the adsorption. Further, breakdown of anthocyanins resulted in phloroglucinol aldehyde from the flavonoid A-ring and corresponding phenolic acids from the B-ring, i.e. gallic acid for D3G, syringic acid for M3G, and vanillic acid for P3G. CONCLUSIONS The breakdown and adsorption of the anthocyanin glucosides can help explain the color loss and aroma changes, such as the appearance of syringic and vanillic acid, associated with malolactic fermentation. This article is protected by copyright. All rights reserved.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    The Journal of the Science of Food and Agriculture

  • Publication date

    2019-12-26

  • Fields of study

    Biology, Medicine, Chemistry, Environmental Science

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar, PubMed

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