STUDIES ON METAL TOLERANCE OF BACTERIAL ASSOCIATES OF MARINE SEDENTARY ORGANISMSS. MOHANTY, M. BAPUP, R.K. MISHRA, A. SREE, P. RAY, S.B. MOHAPATRA AND C.C. RATH
The metal tolerance of 39 endo-biotic bacterial isolates from 11 marine sedentary organisms was studied against eight heavy metals viz., Cr, Fe, Ni, Co, Zn, Cu, Cd and Hg. The morphological study reveals that the Gram-negative rods constituted the predominant microflora of sedentary organisms and they showed versatile metal tolerances. Five strains have shown multiple tolerances to as many as five metals. Some of the isolates showed a high tolerance limit for Hg and Zn as compared to the previous reports. All the three microbial associates of the sponge, Raspalia sp. showed highest tolerance to Zn and Co. Preliminary biosorption studies of two multiple metal tolerant strains, Staphylococcus sp. and Pseudomonas mallei against copper are presented.
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