- 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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