STUDIES ON PHYTOCHEMICAL ANALYSIS AND ANTIBACTERIAL ACTIVITY OF LEAF EXTRACTS OF TERMINALIA TOMENTOSA WIGHT & ARN.Abstract
The present work aimed to screen the phytochemical constituents and antibacterial activity in leaves of different extracts of Terminalia tomentosa (Combretaceae). Phytochemical analysis was performed to check the presence of flavonoids, alkaloids, phenolic compounds, steroids, saponins, tannins, anthocyanins, lignins, and glycosides. The antibacterial activity of aqueous, ethanol and methanol extracts of T. tomentosa was studied against gram-positive bacteria and gram-negative bacteria, Staphylococcus aureus, Escherichia coli and Klebsiella pneumonia. Alkaloids, flavonoids, phenolics, tannins, lignins, steroids, saponins, and glycosides were present in all the three extracts, whereas anthocyanidins were barred. Among the three fractions, ethanol has possessed the highest zone of inhibition on E. coli (19.8 mm), and the minimum inhibition zone was observed in aqueous against K. pneumonia (7.8 mm). In comparison with the extracts and counting with the antibiotics, ciprofloxacin (19-31 mm) has possessed the highest zone of inhibition. The obtained results of leaf extract are worthy for further studies to discover the unrevealed part of it and to prove its efficacy as an alternate for antibacterial infections.
V. A. Krishna *, A. Rekha and P. Sujathamma
Sri Padmavati Mahila Visvavidyalayam (Women’s University), Tirupati, Andhra Pradesh, India.
30 October 2019
06 March 2020
21 March 2020
01 October 2020