Phenolic composition and biological prospecting of grains and stems of Retama sphaerocarpa
authors Touati, R; Santos, SAO; Rocha, SM; Belhamel, K; Silvestre, AJD
nationality International
journal INDUSTRIAL CROPS AND PRODUCTS
author keywords Retama sphaerocarpa; Phenolic compounds; UHPLC-MS; Antioxidant activity; Antibacterial activity
keywords DIFFERENT MORPHOLOGICAL PARTS; HPLC-DAD-ESI/MS; ANTIOXIDANT ACTIVITY; MASS-SPECTROMETRY; MEDICINAL-PLANTS; EXTRACTS; GLYCOSIDES; FLAVONOL; BOISSIER; IDENTIFICATION
abstract Retama sphaerocarpa is a shrub widely used in traditional medicine. Owing to the huge demand for bioactive natural components, it is fundamental to study in detail the composition of this kind of plants. In this vein, the phenolic fraction of grains and stems from R. sphaerocarpa grown in Algeria was thoroughly investigated by ultra-high-performance liquid chromatography coupled to mass spectrometry (UHPLC-MS). The extracts obtained by methanol:water (50:50) extraction were also evaluated for their antioxidant and antibacterial activities. The UHPLC-MS analysis allowed the identification of forty two compounds, with twenty one identified in grains and twenty six in stems extracts. Thirty one of these components are referenced for the first time as constituents of R. sphaerocarpa. Stems showed to contain a considerably higher amount of phenolic compounds (11.40 g kg(-1) of dry weight). Piscidic acid was identified as the major component, followed by quinic acid and morin/quercetin-di-O-rhamnoside. A taxifolin isomer, isorhamnetin-O-hexoside and an apigenin-6,8-di-C-hexoside isomer were found to be the major phenolic compounds in R. sphaerocarpa grains. The studied samples exhibited moderated antioxidant activities, with stems extract showing the most promising results. This fraction of R. sphaerocarpa also exhibited relevant inhibition against the bacteria Staphylococcus aureus and Pseudomonas aeruginosa. These results are a relevant contribution to the valorization of R. sphaerocarpa as a valuable source of natural bioactive compounds, with recognized nutraceutical applications. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0926-6690
isbn 1872-633X
year published 2017
volume 95
beginning page 244
ending page 255
digital object identifier (doi) 10.1016/j.indcrop.2016.10.027
web of science category Agricultural Engineering; Agronomy
subject category Agriculture
unique article identifier WOS:000390621600029
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journal analysis (jcr 2017):
journal impact factor 3.849
5 year journal impact factor 4.072
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