Polyphenols from Allanblackia floribunda seedsIdentification, quantification and antioxidant activity

Authors Organisations
Type Article
Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalFood Chemistry
Volume222
Early online date05 Dec 2016
DOI
Publication statusPublished - 01 May 2017
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Abstract

Oil rich seeds of Allanblackia floribunda, a tree from tropical Africa, have traditionally been used in food preparation. Furthermore, the therapeutic properties of various parts of this tree have long been exploited in traditional medicine. As both food and pharmaceutical industries show growing interest in tropical tree crops, this study aimed to investigate whether A. floribunda seeds could also be used as a source of potentially bioactive compounds. The polyphenol profile revealed six predominant compounds which were identified by HPLC-PDA-ESI/MSn as the biflavonoids morelloflavone, Gb-2a and volkensiflavone and their respective glucosides. A range of less abundant flavones, flavonols and flavan-3-ols was also detected. All six major compounds showed antioxidant activity, with the activity of morelloflavone, its glucoside and Gb-2a-glucoside comparable with that of ascorbic acid. The main compounds accounted for approximately 10% of dry weight, making the seeds used for oil production a rich source of biflavonoids as a by-product.

Keywords

  • Allanblackia floribunda, phenolic compounds, biflavonoids, HPLC-PDA-ESI/MSn, morelloflavone, volkensiflavone, Gb-2a, antioxidant capacity