Antibacterial activity of stem and root extracts of Avicennia officinalis
- N.Sharief, V. UmaMaheswara Rao
- L International Journal of Pharmaceutical…
The present work was attempted to study the Antibacterial activity and phytochemical analysis of Mangrove plant Avicennia alba. Leaf and stem extracts of A. alba were prepared in Hexane, Benzene, Chloroform, Ethyl acetate, Acetone and Methanol solvents. The resulted extracts of the plant were screened for antibacterial activity against Micrococcus luteus MTCC 106, Arthrobacter protophormiae MTCC 2682, Rhodococcus rhodochrous MTCC 265, Alcaligens faecalis MTCC 126, Proteusmirabilis MTCC 425, Enterobacter aerogenes MTCC 10208, Proteus vulgaris MTCC 426, Bacillus megaterium MTCC 428, Enterococcus faecalis MTCC 439, Streptococcus mutansMTCC 497, Salmonella enterica MTCC 3858, Staphylococcus aureus MTCC 737, Pseudomonas aeruginosa MTCC 1688 and Bacillus subtilis MTCC 441. The extracts were also screened for phytochemicals like Carbohydrates, Tannins, Steroids, Terpenoids, Saponins, Flavanoids, Alkaloids and Soluble starch. Of the six solvent extracts of A. alba, ethyl acetate and acetone extracts of leaf and stem, with few exceptions, showed relatively high antibacterial activity. Benzene and chloroform extracts of A. alba showed a larger zone of inhibition against Salmonella enterica than other bacteria. A. alba leaf and stem extracts of different solvents showed good antibacterial activity against Gram negative bacteria than the Gram positive bacteria tested. Most of the solvent extracts of leaf and stem are effective on many bacteria tested than the positive control. The acetone and methanol extracts of leaf and stem showed maximum positive results towards the phytochemical constituents.