alexa Siderophore mediated uranium sequestration by marine cyanobacterium Synechococcus elongatus BDU 130911.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Rashmi V, Shylajanaciyar M, Rajalakshmi R, DSouza SF, Prabaharan D,

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Abstract Four different marine cyanobacterial morphotypes were tested for their efficacy to produce siderophores in Fe minus [Fe(-)], Fe minus Uranium dosed [Fe(-)U(+)], and Fe dosed Uranium dosed [Fe(-)U(+)] media. Of the four organisms tested, Synechococcus elongatus BDU 130911 produced the highest amount of siderophore of 58μgmg(-1) dryweight. The results clearly indicate that uranium induces siderophore production in marine cyanobacteria even in the presence of iron [Fe(-)U(+)] condition. The type of siderophore revealed by FeCl(3), Tetrazolium and Atkin's tests is a hydroxamate; and thin layer chromatogram also authenticates our finding. Uranium siderophore complexation was confirmed through modified Chrome Azurol S (CAS) assay as well as based on residual uranium presence. In silico docking studies further validate siderophore complexation with uranium. Copyright © 2012 Elsevier Ltd. All rights reserved. This article was published in Bioresour Technol and referenced in Journal of Bioremediation & Biodegradation

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