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    Isolation and characterization of novel plant growth promoting Micrococcus sp NII-0909 and its interaction with cowpea

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    Plant_Physiol_Biochem_48_987a.pdf (739.4Kb)
    Date
    2010
    Author
    Dastager, S.G.
    Deepa, C.K.
    Pandey, A.
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    Abstract
    A phosphate-solubilizing bacterial strain NII-0909 isolated from the Western ghat forest soil in India was identified as Micrococcus sp on the basis of phenotypic characteristics, carbon source utilization pattern, fatty acid methyl esters analysis, and 16S rRNA gene sequence. The strain exhibited the plant growthpromoting attributes of phosphate solubilization, auxin production, 1-aminocyclopropane-1-carboxylate deaminase activity, and siderophore production. It was able to solubilize (122.4 mg of Ca sub(3)PO sub(4) ml sup(-1), and produce IAA (109 mu g ml sup(-1)) at 30 degrees C. P-solubilizing activity of the strain NII-0909 was associated with the release of organic acids and a drop in the pH of the NBRIP medium. HPLC analysis detected two organic acids in the course of P-solubilization. A significant increase in the growth of cow pea was recorded for inoculations under controlled conditions. Scanning electron microscopic study revealed the root colonization of strain on cow pea seedlings. These results demonstrate that isolates NII-0909 has the promising PGPR attributes to be develop as a biofertilizer to enhance soil fertility and promote the plant growth.
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    http://drs.nio.org/drs/handle/2264/3742
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