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Pakistan Journal of Biological Sciences
  Year: 2012 | Volume: 15 | Issue: 6 | Page No.: 267-276
DOI: 10.3923/pjbs.2012.267.276
Isolation and Characterization of Plant Growth Promoting Traits of a Rhizobacteria: Pantoea agglomerans lma2
H. Silini-Cherif, A. Silini, M. Ghoul and S. Yadav

Abstract:
The use of microbial technology in agriculture is expanding quickly with the identification of new bacterial strains which are more effective in promoting the growth of plants. The rhizobacteria that promote the growth of plants can have a positive effect on the productivity of crops especially when subjected to salt stress. A nitrogen-fixing bacterium was isolated from the wheat rhizosphere of an arid region. The strain was identified on the basis of tests API20E and 16S rRNA sequencing, as Pantoea agglomerans lma2. This strain degraded several carbon sources: sugars (fructose, ribose, dextrin, salicin…), lipids (lecithin, tributyrin and tween 80), proteins (gelatin, casein), grew on KCN and could grow from pH 4 to 8 and had an optimum at pH 7. The growth temperature showed a maximum at 30°C and the bacteria could tolerate from 4 to 41°C and the growth rate was higher when the NaCl concentration was between 100 and 300 mM. The performance of activities enhancing the growth of plants of P. agglomerans lma2 was significantly better in the presence of salt. Rates of Indole Acetic Acid (IAA), siderophores production and solubilization of phosphate increased between 100 and 400 mM NaCl compared to the control without salt. The maximum values were saved to 300 mM for the production of siderophores (18.32%) and solubilization of phosphate (1061.49 μg mL-1) and 100 mM for the production of IAA (161 μg mL-1). A significant correlation existed between these three activities. These results showed that P. agglomerans lma2 with its Plant Growth Promoting Rhizobacteria (PGPR) and halophilic properties could constitute a good fertilizer in arid and saline zone.
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How to cite this article:

H. Silini-Cherif, A. Silini, M. Ghoul and S. Yadav, 2012. Isolation and Characterization of Plant Growth Promoting Traits of a Rhizobacteria: Pantoea agglomerans lma2. Pakistan Journal of Biological Sciences, 15: 267-276.

DOI: 10.3923/pjbs.2012.267.276

URL: https://scialert.net/abstract/?doi=pjbs.2012.267.276

 
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