Thaumatococcus Daniellii Leaves: Its Chemical Compositions, Antioxidant and Antimicrobial Activities
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Date
2017
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Publisher
Ife Journal of Science
Abstract
The preliminary phytochemical investigation of n-hexane, ethyl acetate and methanol extracts of aumatococcus daniellii leaves revealed the presence of fats and oils, terpenoids, flavonoids, steroids and glycosides. The antimicrobial tests against some strains of bacteria and fungi showed inhibitions at moderate to high concentrations. Methanol extract of the plant exhibited low 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical
scavenging activity with IC of 615.14 µg/ml. Gas chromatography-mass spectrometry (GC-MS) 50 characterization of n-hexane, ethylacetate and methanol extracts of T. daniellii leaves identified , thirteen and
fifteen compounds, with tetracontane (28.76%) and L-ascorbic acid (15.07%); hexadecanoic acid (21.62%) and
γ-sitosterol (11.06%); and naphthalene-1,2,3,5,6,7,8,8a-octahydro-1,8a-dimethyl-7-(1-methylethenyl)-
,[1R(1.alpha.,7.beta.,8a.alpha.] (26.90%) and hexadecanoic acid (12.60%) being the major compounds
respectively. The GC-MS analysis revealed various peaks of bioactive compounds of which the antioxidant and
antimicrobial activities of the plant have been attributed to the prominent compounds in synergy with all the
other compounds present in smaller quantities in the extracts.
Description
Keywords
Thaumatococcus daniellii, γ-sitosterol, Antimicrobial activity, GC-MS analysis, L-ascorbic acid