Sensitivity of four cyanobacterial isolates from tropical freshwaters to environmentally realistic concentrations of Cr⁶⁺, Cd²⁺ and Zn²⁺

Title: Sensitivity of four cyanobacterial isolates from tropical freshwaters to environmentally realistic concentrations of Cr⁶⁺, Cd²⁺ and Zn²⁺
Creator: Munagamage, Thilini; Rathnayake, I. V. N.; Pathiratne, A.; Megharaj, Mallavarapu
Relation: Bulletin of Environmental Contamination and Toxicology Vol. 96, Issue 6, p. 816-821
Publisher Link: http://dx.doi.org/10.1007/s00128-016-1809-4
Publisher: Springer
Resource Type: journal article
Date: 2016
Description: 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.
Subject: cyanobacteria; chromium; cadmium; zinc; fluorescence; concentration response
Identifier: http://hdl.handle.net/1959.13/1323571
Identifier: uon:24839
Identifier: ISSN:0007-4861
Language: eng
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