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7880288 
Journal Article 
Magneto bacteria from estuarine, mangrove and coral reef environs in Gulf of Mannar 
Kannapiran, E; Purushothaman, A; Kannan, L; Saravanan, S 
1999 
1 
Indian Journal of Marine Sciences
ISSN: 0379-5136 
28 
3 
332-334 
WOS:000084613600019 
Totally 37 strains from the three biota were isolated: with predominance of Bacillus spp, followed by Pseudomonas spp. Spirillium spp., and Vibrio spp. Based on the fatty acid profile, a few of the strains were identified as Pseudomonas mesophilico, Pseudomonas caryophylli and Bacillus cereus. Of the three biota studied, the coral reef harbours higher percentage of magnetotactic bacteria followed by The mangroves and estuaries. The strains were further studied for growth, salinity optimum, magnetotaxis and survival. The bacterial growth was observed as a ring formation between 7 and 14 days of inoculation. The distance to the ring from the top surface of culture medium ranged from 0.5 to 4.6 cm. The ring was prominent in a salinity of 20 ppt. Regarding magnetotaxis, a 3 h exposure to the external magnetic field was required for 100% aggregation of bacterial cells. The magnetobacteria isolated from coral reef were able to magnetic for 5 to 6 months whereas those from mangroves and estuaries survived for 4 and 2 months respectively.