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  • Title: Isolation and characterization of plant growth-promoting strain Pantoea NII-186. From Western Ghat forest soil, India.
    Author: Dastager SG, Deepa CK, Puneet SC, Nautiyal CS, Pandey A.
    Journal: Lett Appl Microbiol; 2009 Jul; 49(1):20-5. PubMed ID: 19413772.
    Abstract:
    AIMS: To isolate plant growth-promoting bacterium from Western Ghat forests in India. METHODS AND RESULTS: A Gram-negative, rod shaped, cream white coloured strain Pantoea NII-186 isolated from Western Ghat soil sample. The taxonomic position of the bacterium was confirmed by sequencing of 16S rRNA and phylogenetic analysis. A strain grew at a wide range of temperature ranging from 5-40 degrees C, but optimum growth was observed at 28-30 degrees C. It showed multiple plant growth-promoting attributes such as phosphate solubilization activity, indole acetic acid (IAA) production, siderophore production and HCN production. It was able to solubilize (28 microg of Ca(3)PO(4) ml(-1) day(-1)), and produce IAA (59 microg) at 28 degrees C. The solubilization of insoluble phosphate was associates with a drop in the pH of the culture medium. Pantoea sp. NII-186 tolerate to different environmental stresses like 5-40 degrees C, 0-7% salt concentration and 4-12 pH range. CONCLUSIONS: The 16S rRNA gene sequence confirmed that the isolate NII-186 was belongs to Pantoea genus and showed considerable differences in physiological properties with previously reported species of this genus. Isolate NII-186 possessed multiple attributes of plant growth-promoting activity. SIGNIFICANCE AND IMPACT OF THE STUDY: Hence in the context it is proposed that Pantoea sp. NII-186, could be deployed as an inoculant to attain the desired plant growth-promoting activity in agricultural environment.
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