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International Journal of Plant Pathology
Year: 2014  |  Volume: 5  |  Issue: 1  |  Page No.: 12 - 20

Toxicity, PGP Activity, Bioaccumulation of Cadmium, Copper and Chromium (VI) in Nitrogen-fixing Rhizobacteria

Malik M. Ahmad, Athar Ali, Pravej Alam, Saleem Javed, M.Z. Abdin and Mohammad Saghir Khan    

Abstract: Heavy metal pollution of soil is a significant environmental problem and has its negative impact on human health and agriculture. Rhizobial isolates present in rhizospheric region can play a key role in remediation of polluted sites, in which, microbial populations are known to affect heavy metal mobility and availability to the plant through release of indole acetic acid, siderophores, ammonia, phosphate solubilizing agents and other Plant Growth Promoting (PGP) substances and therefore, have potential to enhance bioremediation processes. Bioremediation strategies with suitable heavy metal-adapted rhizobacteria have received a lot of attention. This study tells the effect of heavy metals (Cd2+, Cu2+ and Cr6+) on the growth of different rhizobial cultures, their PGP producing ability and significance of bioaccumulation of toxic heavy metals on rhizobium.

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