Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/101850
Title: Characterization of phenolic constituents and evaluation of antioxidant properties of leaves and stems of Eriocephalus africanus
Authors: Catarino, Marcelo D.
Silva, Artur M. S. 
Saraiva, Susana C.
Sobral, Abílio J. F. N. 
Cardoso, Susana M.
Keywords: Eriocephalus africanus; Phenolic compounds; Caffeoylquinic acid; Antioxidant; Mass spectrometry; Nuclear magnetic resonance
Issue Date: 2018
Project: FCT/PTDC/AAC-CLI/118092/2010, PEst-OE/QUI/UI0313/2014 
FCT - Project PEst-OE/AGR/UI0681/2011 
project PEst-C/QUI/UI0062/2013; FCOMP-01-0124-FEDER-037296) and the Portuguese National NMR Network (RNRMN). 
Serial title, monograph or event: Arabian Journal of Chemistry
Volume: 11
Issue: 1
Abstract: Eriocephalus africanus, an Asteraceae plant endemic from South Africa and naturalized in the Mediterranean region, is commonly used in culinary and in traditional medicine. Despite the claimed health benefits attributed to this plant by the folk medicine, there is still a lack of scientific data to support this information. The present study describes the main phenolic composition of hydroethanolic extracts from stems and leaves of E. africanus, along with the assessment of their antioxidant properties. The identification of the phenolic constituents on the stems and leaves from E. africanus was carried out by LC-DAD-ESI/MSn, and the structures of the two major HPLC-eluted compounds were further confirmed by NMR analysis. Both extracts were rich in mono- and di-caffeoylquinic acids, which accounted for approximately 90% and 74% of total quantified phenolics, for the stems and leaves extracts, respectively. Besides, eriodictyol-hexuronide was found in considerable amounts in the extract from the leaves. One must highlight that these compounds together with other minor phenolic acids (namely other caffeoyl, ferulic and protocatechuic acid derivatives) and flavonoids (including hesperetin and eriodictyol) were herein identified for the first time. Furthermore, through three in vitro methods, namely 2,2-diphenyl-1-picrylhydrazyl (DPPH ) radical scavenging, ferric reducing antioxidant power and lipid peroxidation inhibition capacity assays, the antioxidant capacity of the extracts was measured, revealing promising properties. Overall, these results are an important contribution for the elucidation of the phenolic composition of E. africanus, as well as for the understanding of the biological properties of this medicinal plant species.
URI: https://hdl.handle.net/10316/101850
ISSN: 18785352
DOI: 10.1016/j.arabjc.2015.04.018
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
1-s2.0-S1878535215001203-main.pdf555.65 kBAdobe PDFView/Open
Show full item record

SCOPUSTM   
Citations

29
checked on Nov 9, 2022

WEB OF SCIENCETM
Citations

34
checked on May 2, 2023

Page view(s)

50
checked on Mar 26, 2024

Download(s)

32
checked on Mar 26, 2024

Google ScholarTM

Check

Altmetric

Altmetric


This item is licensed under a Creative Commons License Creative Commons