Protection against Mg2+, Cu2+ and Zn2+ toxicity through siderophore in Frankia strains nodulating Hippöphae salicifolia D. Don

To study the role of siderophore in protecting the frankial strains from metal toxicity, Frankia strains were grown in presence of Mg2+, Cu2+ and Zn2+. Growth was observed up to (500 uM) Mg2+, (10 uM) Cu2+ and (10 uM) Zn2+ and maximum at 200 uM Mg2+, 1 uM Cu2+ and 1 uM Zn2+.

The siderophore production increased up to 500 uM Mg2+, 10 uM Cu2+, 100 uM (hydroxamate) and 200 uM (catecholate) Zn2+ while maximum production was found at Mg2+ (200 uM), Cu2+ (10 uM) and Zn2+ (10 uM). The results suggested that the growth was protected at higher concentration of (up to 500 uM) Mg2+, (10 uM) Cu2+ and (10 uM) Zn2+ possibly by the enhanced level of siderophore. Thus, Frankia strains will be helpful in minimizing the metal toxicity through siderophore mediated iron resources which play a major role in nutritional balances and the regulation of the energy requiring processes that are in extreme demand during the adaptation towards the metal stress/ metal toxicity.



Copyright: © Aristotle University of Thessaloniki
Quelle: 2nd International Conference 2009 (Juni 2009)
Seiten: 7
Preis inkl. MwSt.: € 5,00
Autor: A. Singh
S.S. Singh
P.C. Pandey
A. K. Mishra

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