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Metal–salt co-tolerance and metal removal by indigenous cyanobacterial strains

Paper ID Volume ID Publish Year Pages File Format Full-Text
35842 45110 2008 7 PDF Available
Title
Metal–salt co-tolerance and metal removal by indigenous cyanobacterial strains
Abstract

Chromium and salt tolerance in five indigenous cyanobacterial strains isolated from contaminated sites was investigated along with their metal bioaccumulative potential. All the five species showed significantly better growth when the medium was spiked with salt or chromium. As compared to single metal or salt treatment, the binary metal–salt (MS) treatments had more favorable effect on cyanobacterial growth as indicated by significantly higher concentration of the primary photosynthetic pigment chlorophyll at M20S2000 (9.9–25.3 μg/mL) as compared to that at M0S0 (4.0–12.3 μg/mL). Similarly biomass was much higher at M20S1000 and M20S2000 (41.8–86.2 mg/10 mL) as compared to that at control, M0S0 (21.5–36.3 mg/10 mL). Accessory pigments like carotenoids and phycobilinproteins too tended to increase significantly in response to both metal and salts in the two species of Lyngbya (L. putealis and L. ceylanica var. constricta) and Gloeocapsa. These species also showed greater potential of chromium bioaccumulation, which increased further as both salt and metal concentration increased. In the two species of Nostoc however, bioaccumulative potential improve at higher metal concentration, but not affected significantly by salt concentration.

Keywords
Hexavalent chromium; Indigenous cyanobacteria; Photosynthetic pigments; Co-tolerance; Chromium removal; Lyngbya
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Metal–salt co-tolerance and metal removal by indigenous cyanobacterial strains
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 43, Issue 6, June 2008, Pages 598–604
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us