COMPARATIVE STUDIES ON BIOTHERAPEUTIC POTENTIALS OF TWO SELECTED MEDICINAL PLANTS- PIMENTA DIOICA AND EPIPHYLLUM OXYPETALUM
*Pratima Khandelwal1, R. S.Upendra1, R.Yashaswini 2, B.Subha2, G.Sneha2 and Geetha Gujjar Ramachandra3
1Dept. of Biotechnology, New Horizon College of Engineering, Marathahalli, Bangalore, Karnataka, India
2BE Biotechnology Alumni (Batch 2008-2012)
3Research Associate, NDRI- Southern Regional Station, Bangalore, Karnataka, India.
ABSTRACT
Pimenta dioica is a variety of sweet pepper used as a spice and its
leaves are used for traditional culinary purpose. Epiphyllum
oxypetalum is a species of cactus and can be used as a substitute for
digitalis. Scanty work has been reported on the phytochemical
properties, assessment of nutritive value and bio-therapeutical
potentials of these two important medicinal plants. Thus, the present
investigation was carried out to access and compare the nutritive
values, phytochemical constituents and biotherapeutic potentials of leaf
extracts of both the plants. The nutritive values showed significant
presence of proteins (12 mg/g and 14 mg/g), fatty acids (5.8 mg/g and
4.6 mg/g), and vitamins (0.12mg/g and 0.18 mg/g) in Pimenta dioica
and Epiphyllum oxypetalum respectively while carbohydrates were
found to be absent in both the plants. Phytochemical analysis of both the plants showed the
presence of saponins, phenolic compounds, steroids, glycosides, tannins, terpenoids, and
resins. Three solvent systems, (aqueous, acetone and methanol) were studied for Pimenta
dioica leaf extract. Maximum zone of inhibition was exhibited by methanol leaf extracts in
increasing order for Escherichia coli, Bacillus cereus, Salmonella typhimurium, and
Staphylococcus aureus. Lesser inhibitory zones were obtained by acetone leaf extracts. Three
solvent systems, (ethanol, acetone and petroleum ether) were studied for Epiphyllum oxypetallum leaf extract. Maximum zone of inhibition was exhibited by acetone and
petroleum ether (14mm) leaf extracts for Escherichia coli, acetone (14mm) for
Staphylococcus aureus, acetone (11mm) and ethanol (10mm) for Klebsiella pneumonia and
petroleum ether (12mm) for Bacillus subtilis. Leaf extracts of both the plants were found to
be ineffective against fungal strains tested. Present investigation revealed that Pimenta dioica
and Epiphyllum oxypetalum leaves could be a very useful resource as biotherapeutic agents.
Keywords: Pimenta dioica, Epiphyllum oxypetalum, leaf extracts, phytochemicals, Antibacterial activity, reducing ability.
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