Phenolic contents and antioxidant capacities of wild and cultivated white lupin (Lupinus albus L.) seeds

The aim of this study was to compare the antioxidant capacities and phenolic compound profiles of wild and cultivated Lupinus albus L. seeds. The total phenolic content (TPC), radical scavenging activity, ferric-reducing antioxidant power (FRAP) and antioxidant activity in an beta-carotene-linoleic acid emulsion were determined. Liquid chromatography-mass spectrometry was used to identify phenolics. The TPC of lupin seeds ranged from 4.36 to 7.24 mg gallic acid equivalent/g dry matter (d.m.). The dominant phenolics of all genotypes were two p-coumaric acid derivatives (0.74-1.61 and 0.66-1.63 mg/g d.m.) and apigenin-6,8-di-C-glucoside (1.13-1.31 mg/g d.m.). The results of antioxidant assays of wild lupin extracts were similar to or lower than those of the cultivated variety. FRAP and ABTS(center dot+) scavenging activity were correlated with the contents of the more polar p-coumaric acid derivative and apigenin-6,8-di-C-glucoside. Generally, significant differences between cultivated and wild L. albus seeds were not found in antioxidant capacities and phenolic compound contents.Turkey's Higher Education Council (YOK); European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program [POIG.02.01.00-12-023/08]Hakime Hulya Orak thanks to Turkey's Higher Education Council (YOK) for financial support for her stay in Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences in Olsztyn. The MS analysis was carried out with the equipment purchased thanks to the financial support of the European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program (contract no. POIG.02.01.00-12-023/08)