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Pak. J. Bot., 45(S1): 535-544, 2013. |
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Updated: 01-02-13 | ||||
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PHOSPHATE SOLUBILIZING BACTERIA ASSOCIATED WITH VEGETABLES ROOTS IN DIFFERENT ECOLOGIES
ALIA1, AFTAB AFZAL1* SHAHIDA N. KHOKHAR3, BUSHRA JABEEN2, AND SAEED A. ASAD4
Abstract: Forty two isolates were recovered as phosphorus solubilizing bacteria (PSB) from rhizosphere of healthy plants of pea, spinach, lady’s finger, French bean, kulfa, cauliflower, turnip, brassica, cucumber, coriander, onion, potato, capsicum, salad, eggplant and field mint from 25 locations in Mansehra district, Taxila area and Islamabad. PSB population ranged from 1.95x107 in lady’s finger to 5.33x109 in turnip in Mansehra area. It ranged from 1.9x106 in spinach to 1.3x109 in field mint in Taxila area while in Islamabad up to 8x105 in spinach. Highest Solublization Index (4.25) was found in one isolate from spinach in Mansehra while 10 isolates from 10 vegetables had PSB of Solublization Index in the range of 3.5-4.4 from Taxila area. Solubilization capacity ranged from 5.32-151 μgmL-1. Among the tested isolates, SAFA-2 was found as the best in solubilizing phosphate 151 μgmL-1 with the drop in pH from 7.02-3.55. Population in Taxila area was found negatively correlated with clay, phosphorus and organic matter while, positively correlated with soil pH, EC and soil nitrate. The results indicated that soils of the study area inhabit PSB with great potential to be used as bio inoculants.
1Department of Botany Hazara University, Mansehra, Pakistan 2Department of Biosciences University of Wah, Wah Cantt. Pakistan 3LRRI, NARC, Islamabad, Pakistan 4Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan *Corresponding author’s e-mail: aftabafzalkiani@yahoo.com |
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