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Polyphenol Contents and Antioxidant Activities of Five Indigofera Species (Fabaceae) from Burkina Faso |
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S. Bakasso,
A. Lamien-Meda,
C.E. Lamien,
M. Kiendrebeogo,
J. Millogo,
A.G. Ouedraogo and O.G. Nacoulma |
Abstract:
Aqueous acetone extracts prepared from five Indigofera
species of Burkina Faso, namely Indigofera colutea (Burm.) Murril.,
I. macrocalyx Guilld et Perr., I. nigritana Hook f., I.
pulchra willd. and I. tinctoria L., were investigated for their
phytochemical composition and their antioxidant activities. Standard methods
and TLC were used to screen the phytochemical composition. The total phenolic
and flavonoid content of extracts were assessed by Folin-Ciocalteu and
AlCl3 methods, respectively. These extracts were also evaluated
for their antioxidant potentials using ferric reducing antioxidant power
(FRAP), 2,2-diphenyl-l-picrylhydrazyl (DPPH) and 2,2`-azinobis(3-ethylbenzothiazoline-6-sulphonate)
(ABTS) assays. Flavonoids, saponins, quinones, sterols/triterpenes and
tannins were present in all these species except for I. pulchra
where quinones were not found. Gallic acid, caffeic acid, rutin and myricetin
in I. colutea; gallic acid, quercitrin, myricetin in I. tinctoria;
galangin and myricetin in I. macrocalyx were identified
by thin layer chromatography. Among these, I. colutea, I.
tinctoria, I. nigritana and I. macrocalyx, which had
the highest phenolic content, were also found to possess the best antioxidant
activities. The results indicated a good correlation between antioxidant
activities and total phenolic content (p<0.05 for FRAP/DPPH and DPPH/ABTS
and p<0.01 for FRAP/ABTS). These plants represent promising sources
of natural antioxidants and these findings give scientific bases to their
ethnopharmacological uses.
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How to cite this article:
S. Bakasso, A. Lamien-Meda, C.E. Lamien, M. Kiendrebeogo, J. Millogo, A.G. Ouedraogo and O.G. Nacoulma, 2008. Polyphenol Contents and Antioxidant Activities of Five Indigofera Species (Fabaceae) from Burkina Faso. Pakistan Journal of Biological Sciences, 11: 1429-1435.
DOI: 10.3923/pjbs.2008.1429.1435
URL: https://scialert.net/abstract/?doi=pjbs.2008.1429.1435
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