Affiliation:
1. Department of Microbiology, Maharani’s Science College for Women, Mysore, Karnataka, India
Abstract
The antibacterial activity of selected medicinal plants namely Tagetus erecta L. and Pelargonium graveolens extracts was studied against Xanthomonas axonopodis pv. Punicae, the causative agent of Bacterial blight of Punica granatum. The plants are selected based on their traditional use as medicinal plants.The water, ethanol and methanol extracts of Tagetusr erecta L. and Pelargonium graveolens were used for antibacterial activity assay by Kirby Bauer disc diffusion method. Among these extracts, only methanol extract of Taget erecta L.has showed substantial antibacterial activity against Xanthomonas axonopodis pv. Punicaeand all other extracts showed less antibacterial activity.The phytochemical constituents such asalkaloids, flavonoids, tannins, proteins, resins, proteins, saponins, terpenoids, steroids, and glycosides were found to be present in selected plant extracts as per preliminary phytochemical investigation. Only methanol extract showed maximum inhibition zone and all other extracts of Tagetus erecta and extracts of Pelargonium graveolens have showed less inhibition activity against Xanthomonas axonopodis pv. Punicae. The Minimum inhibitory Concentration and Minimum bacteriocidal concentration of Tagetus erecta L. methanol extract was found to be 25mg/ml and 25mg/ml respectively. Our study revealed the possible application of Tagetus erecta L. methanol extract in the management of Bacterial blight of Punica granatum.
Publisher
Enviro Research Publishers
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