Microbiology
Permanent URI for this collectionhttp://repository.kln.ac.lk/handle/123456789/3749
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Item Sensitivity of Four Cyanobacterial Isolates from Tropical Freshwaters to Environmentally Realistic Concentrations of Cr6+(Springer US., 2016) Munagamage, T.; Rathnayake, I.V.N.; Pathiratne, A.; Megharaj, M.Sensitivity of four tropical cyanobacteria viz. Coelosphaerium sp., Synechococcus sp., Oscillatoria sp. and Chroococcus sp. to environmentally relevant concentrations of Cr6+, Cd2+ and Zn2+was assessed based on fluorescence change as a proxy for growth reduction. At 24 h exposure, the growth reduction inthe cyanobacteria followed the order: Zn2+ < Cr6+ ≤ Cd2+. Of the four cyanobacteria, Synechococcus was the most sensitive for Cr6+, where as Chroococcus was the most sensitive for Cd2+and Zn2+. Sensitivity was gradually decreased by 96 h implying the acquisition of tolerance by cyanobacteria to heavy metal ions with prolonged exposure.Item Microbiological quality of ballast water discharged from ships arriving in Colombo inner harbour(Marine Environment Protection Authority, 2015) Jayasundera, C.D.; Rathnayake, I.V.N.