INVESTIGATION OF ANTIMICROBIAL ACTIVITY OF SOME SELECTED WEED SPECIES

Medicinal plant species are more important because they are dependable sources for the curing of various ailments. The medicinal value of plant species increase due to the presence of chemical constituents which cause different pharmacological action on human body. The methanol leaf extract of Ziziphus jujuba, Withania coagulens, Tinospora cordifolia, Abutilon indicum and Acacia modesta showed an active antibacterial activity against Escherichia coli, Pseudomonas fluorescence, Bacillus subtilis, Staphylococcus aureus, Xanthomonas axonopodis and X. malvacearum. Alternatively the extract of plants also shows a significant antifungal activity against Aspergillus flavus, Drechslera turcica and Fusarium verticillioides as compared to bark and root extracts. The extract obtained from the leaf of Abutilon indicum and Acacia modesta showed a significant antibacterial activity against B. subtilis while the leaf extract which is obtained from the Z. jujuba showed an awesome result against X. axonopodis and X. malvacearum. The extract is also obtained from other parts than leaf i.e. including root and stem. The extract from the leaf and root of Abutilon indicum showed its antibacterial activity against all the test bacteria. The leaf and bark extracts of A. modesta showed a progressive result against fungal activity of A. flavus. Beside A. Modesta, the Tinospora cordifolia and Z. jujuba showed active activity against fungi while the methanolic extract of Abutilon indicum showed an important antifungal activity against F. verticillioides.