In vitro evaluation of the anti-microbial activity and the anti-oxidant activity of the flavonoids extracted from the flowers of the Tamarix africana Poir
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Date
2017-07-31
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Journal of Biosciences
Abstract
The aim of this work is to determine the quantity, the quality, the antimicrobial activity and the antioxidant power
of various extracts of the flavonoids obtained from the flowers of Tamarix africana Poir. The quantification of the
extracts obtained was revealed in high yield of the flavonoids with respectively: the methanoic extracts (26.31%),
the extracts of the aqueous phase (19.29%), the extracts of ethyl acetate (0.87%), the extracts of petroleum ether
(0.18%). The qualitative study, using the thin-layer chromatography (TLC), showed the dominance of Flavonols,
flavones, isoflavones, flavanones and 3-glycosidic Anthocyanidins. The study of microbial activity revealed an
important bactericidal power for the extracts of the aqueous phase on Gram + bacteria with a disc of inhibition of
24±1mm on Staphylococcus aureus ATCC43300 and 20±1mm on Staphylococcus aureus ATCC 25923, For the
antifungal activity all the extracts gave important effects on Podosphaera leucotrichia (apple powdery mildew),
with a maximum disc inhibition of 20±1mm for the ethyl acetate extracts, on the other hand alone The ether
extracts of the petrol which showed an inhibitory effect on Penicillium sp. The antioxidant study, expressed as a
percentage of DPPH, showed a high efficiency of the various extracts; In particular that of the ethyl acetate extract
which inhibits oxidation and traps the free radicals at 100%, which demonstrating the use of this plant in traditional
medicine for the treatment of certain types of cancer.