Ecology, Environment and Conservation Paper

Vol.15, Issue 02, 2009; Page No.(245-248)

ANTIMICROBIAL ACTIVITY OF CERTAIN TOXIC PLANTS

S. Selvakurnar and M.R. Rajan

Abstract

The present study was carried out for the antimic.robiai activity of certain toxic plants. The leaves of four toxic plant species such as Cliestanthus collimus, Nerium indicum, Strychnos nuxvornica and Parthenia histopora were collected, shaded, dried and powdered. Plant extracts were extracted with different solvent like petroleum ether and acetone by using soxlet apparatus. Four pathogenic bacteria such as Staphylococcus aureus, Bacillus subtilis, Pseudornonas aeriginosa and Klebsiella sp. were maintained by subculture methods.The solvent extracts (petroleum ether and acetone) of the four potential plants were studied for their antimicrobial activity using Kirby — bauar disc diffusion, plate dilution technique and spread technique. Among the selected four plants acetone extracts against the pathogen of Strychnos nuxvomica was found to be much more resistance with the zone inhibition. Among the three concentrations 1000, 500 and 250 ppm of Strychnos nuxvomica was found to be highly inhibitory on the pathogen Staphylococcus aureus.

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