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Lookup NU author(s): Gultakin Hasanaliyeva, Eleni Chatzidimitriou, Dr Marcin Baranski, Dr Nikolaos Volakakis, Emeritus Professor Chris SealORCiD, Professor Carlo Leifert, Dr Leo RempelosORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Grapes contain high concentrations of secondary metabolites and antioxidants that havebeen linked to a reduction of several chronic diseases. Here, we report results of a UK retail survey,which investigated the effect of the production region (Mediterranean vs. South Africa), grapetype (white vs. red vs. black) and variety, and production system (organic vs. conventional) onantioxidant activity and concentrations of phenolic compounds in table grapes. Black grapes had~180% total antioxidant activity (TAA), ~60% higher total phenolic content (TPC) and ~40 timeshigher anthocyanin concentrations (TAC) than white grapes, while red grapes had intermediatelevels of TAA, TPC and TAC. The e ects of season and production system and di erences betweenvarieties of the same grape type were substantially smaller. Grapes imported from Mediterraneancountries in summer had a 14% higher TPC and ~20% higher TAA than grapes imported from SouthAfrica in winter, and organic grapes had a 16% higher TPC and 22% higher TAA, but ~30% lowerTAC than conventional grapes. Significant differences in TPC, TAA and/or TAC between organic andconventional grapes could only be detected for specific grape types, varieties and/or sampling years.
Author(s): Hasanaliyeva G, Chatzidimitrou E, Wang J, Baranski M, Volakakis N, Seal C, Rosa EAS, Iversen PO, Vigar V, Barkla B, Leifert C, Rempelos L
Publication type: Article
Publication status: Published
Journal: Foods
Year: 2020
Volume: 9
Online publication date: 16/12/2020
Acceptance date: 13/12/2020
Date deposited: 18/12/2020
ISSN (electronic): 2304-8158
Publisher: MDPI AG
URL: https://doi.org/10.3390/foods9121874
DOI: 10.3390/foods9121874
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