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Indian Journal of Experimental Biology (IJEB) >
IJEB Vol.48 [2010] >
IJEB Vol.48(06) [June 2010] >
| Title: | Evaluation of multiple plant growth promoting traits of an isolate of Pseudomonas fluorescens strain Psd |
| Authors: | Upadhyay, Ashutosh
Srivastava, Sheela |
| Keywords: | Antibiotics
Antimicrobial property
Biocontrol
Biosynthesis gene
IAA biosynthesis
Phosphate solubilization |
| Issue Date: | Jun-2010 |
| Publisher: | CSIR |
| Abstract: | P.
fluorescens strain Psd was isolated from the rhizosphere of Vigna mungo and evaluated for its
multiple plant growth promoting and biocontrol properties against F. oxysporum. Interestingly, this strain
not only produces a range of antimicrobial compounds but also solubilizes
complexed phosphates and synthesizes phytohormone (IAA). These properties can
be assessed to elucidate the agronomic significance and rhizospheric competence
of this soil isolate. Biocontrol action has been demonstrated in vitro against some other rhizospheric
bacteria, and a phytopathogenic fungus along with wild type E. coli K-12. Genetic evidence for the
antimicrobial status of strain Psd has been derived in terms of elucidating a
unique combination of phenazine and pyrrolnitrin biosynthesis genes, not
reported for any other P. fluorescens
strain. The conserved part of antibiotics biosynthesis operon has been PCR
amplified, cloned, sequenced and phylogenetic relationship based on similar
genes from a few known Pseudomonads has been derived. The properties possessed
by strain Psd may enable the bacterium to establish itself successfully in the
rhizosphere. |
| Page(s): | 601-609 |
| ISSN: | 0975-1009 (Online); 0019-5189 (Print) |
| Source: | IJEB Vol.48(06) [June 2010]
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