Biodiversity of phosphate solubilizing bacteria in rhizosphere of chickpea,mustard and wheat grown in different regions of Haryana |
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Authors: | B S Kundu Kiran Nehra R Yadav M Tomar |
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Institution: | (1) Department of Microbiology, CCS HAU, Hisar, 125 004, India;(2) Department of Biotechnology, CDLU, Sirsa, 125 055, India |
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Abstract: | The native population of phosphate solubilizing bacteria (PSB) was studied in the rhizosphere of chickpea, mustard and wheat
grown in different regions of Haryana. A total of 193 PSB were isolated from 245 rhizospheric samples collected from south-west
and north-east zones. The PSB count showed large variations (3−67 × 105cfu/g) and biodiversity within the crop and place of sampling. Using biochemical analysis, the isolates were tentatively identified
as belonging to four genera, Pseudomonas, Aeromonas, Klebsiella and Enterobacter. Phosphate solubilization of these isolates varied from 5.9 to 123.8% and 2.2 to 227.2 μg/ml in solid and liquid Pikovskaya’s
medium, respectively. Based on their morphological traits, all the isolates were placed into 20 groups, majority of them falling
in the group having white, round and gummy colonies, irrespective of the crop or the region. The intrinsic antibiotic resistance
pattern showed large variations among the isolates and most of the isolates were resistant to streptomycin, ampicillin and
penicillin. The highest PSB number and greatest variability were found in the rhizosphere of chickpea, followed by wheat and
then mustard. |
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Keywords: | Phosphate-solubilizing bacteria Mustard Wheat Chickpea Biodiversity Rhizosphere |
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