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Ulex europaeus: from noxious weed to source of valuable isoflavones and flavanones
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Advisor(s)
Abstract(s)
The screening and quantification of the main phenolic compounds in leaves and flowers of Ulex europaeus
(gorse) was carried out by high-performance liquid chromatography with electrospray ionization mass
spectrometric detection (HPLC-ESI–MSn) after ultrasound-assisted extraction with methanol. About 98%
of compounds corresponded to flavonoids, distributed as flavonols, flavones, isoflavones and flavanones.
Flavonols were mainly quercetin glucosides; most of the found flavones were apigenin derivatives and
the isoflavone group was dominated by glycitin. The flavanone group was composed mainly of liquiritigenin derivatives, substances usually found in liquorice (Glycyrrhiza ssp) and associated with high
pharmacological relevance; in Ulex they represent about 25% of total polyphenols content. Phenolic acids
and saponins were also detected, as minor components. In vitro antioxidant activity (nitric oxide, superoxide assays, ABTS and DPPH assays) of leaves and flowers, and their inhibitory effects towards digestive
enzymes related to carbohydrate metabolism (-glucosidase and -amylase) were also studied.
Description
Keywords
Ulex europaeus Isoflavones Liquiritigenin HPLC-ESI/MSn analysis Antioxidant activity Digestive enzymes inhibition . Faculdade de Ciências Exatas e da Engenharia Centro de Química da Madeira
Citation
Spínola, V., Llorent-Martínez, E. J., Gouveia-Figueira, S., & Castilho, P. C. (2016). Ulex europaeus: from noxious weed to source of valuable isoflavones and flavanones. Industrial Crops and Products, 90, 9-27.
Publisher
Elsevier