Journal
CURRENT MICROBIOLOGY
Volume 45, Issue 5, Pages 323-327Publisher
SPRINGER
DOI: 10.1007/s00284-002-3762-1
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Pseudomonas sp. NBRI 4014 is a potent phosphorus solubilizer (284 mug/ml). It also produced significant levels of siderophore (143.87 mug/ml) and IAA (5.6 mug/ml). Siderotyping indicated it was P. aeruginosa siderovar 1. Cadmium (180 muM), nickel (420 muM), and chromium (370 muM) resistant mutants were developed and characterized for their PGPR properties. Mutants were stable under non-selective pressure. In cases of nickel and cadmium, there were reductions of the siderophore levels. However, they were able to promote root and shoot elongation in soybeans (Glycine max PK 564) at a significant level (p < 0.05) in the presence of metals unfamiliar to the wild type. The persistence and stability of mutants were evident in rhizospheric soil, thus their exploitation for polluted/contaminated sites was supported.
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