ANTIBACTERIAL ACTIVITY OF MARINE RED ALGA GRATELOUPIA LITHOPHILA BOERGESEN

Author(s): Priya, P, Murugesan, S* Kotteswari, M, Shanthi, N and Sivamurugan.V

Abstract: The present study was undertaken to investigate the methanol extract of marine red alga Grateloupia lithophila Boergesen collected from Kovalam Beach, Tamilnadu for its potential activity against human bacterial pathogens viz. Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Staphylococcus aureus by disc diffusion method. The methanol extract of G. lithophila at a maximum (750µg/mL) concentration showed a zone of inhibition (16 mm) against E.coli, P. aeruginosa and S. aureus whereas, in minimum concentrations (250 µg/mL) showed inhibition zone of 12 mm against E.coli and S. aureus. The methanol extract of G. lithophila displayed potential activity against bacterial pathogens tested; however, studies are in progress to explore the novel antibacterial bioactive molecules.

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