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International Journal on Algae
SJR: 0.219 SNIP: 0.261 CiteScore™: 0.24

ISSN Imprimir: 1521-9429
ISSN En Línea: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v11.i4.80
pages 394-402

Chromium-induced in vivo DNA changes in marine algae Oscillatoria willei BDU 130511 (Cyanophyta)

P. Swaminathan
National Facility for Marine Cyanobacteria, Bharathidasan University, Tiruchirappali 620024
R. Venugopal
Department of Chemistry, Bharathidasan University, Tiruchirappali 620024
P. Mallayan
Department of Chemistry, Bharathidasan University, Tiruchirappali 620024
U. Lakshmanan
National Facility for Marine Cyanobacteria, Bharathidasan University, Tiruchirappali 620024

SINOPSIS

This work has been devised to resolve and examine the fate of chromosomal DNA of marine cyanobacterium (Cyanophyta) Oscillatoria willei BDU 130511 upon chromium exposure. The organism exhibited ability to grow at 1 mM hexavalent chromium. Decreased intensity at base stacking and 3 nm red-shift in the helicity band of circular dichroism (CD) spectrum coupled with decreased DNA viscosity; which demonstrated the change in structure of DNA through possible electrostatic interaction of Cr (III) ions as an adaptive mechanism. Increased chromate reductase activity provided evidence for the conversion of toxic Cr (VI) to less toxic Cr (III).