Effects of certain seaweed extracts on the primary bio-film forming bacteria

Journal of the Marine Biological Association of India 01/2011; 53(1):104 - 110.


The present investigation is an attempt to bring out the specific antifouling properties of extracts of five
species of marine algae collected from the Gulf of Mannar area of Tuticorin coast. The extracts from
seaweeds namely, Ulva lactuca, Caulerpa scalpelliformis, Padina boergesenii, Caulerpa sp. and
Chaetomorpha linoides were tested against biofilm forming bacteria namely, Micrococci sp., Aeromonas
sp., Pseudomonas sp., Flavobacterium sp., Cytophaga sp. and Enterobacter sp. The disc diffusion method
was used to find out the inhibition of biofilm forming bacteria through zone of inhibition. Among five
algal genera, four species were found to have antagonistic activity against biofilm forming bacterial
isolates. We conclude that the broad antifouling properties of the crude extracts of the four seaweed
species inhibit the growth of biofilm forming bacteria.

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