PHOSPHATE SOLUBILIZING BACTERIA ASSOCIATED WITH VEGETABLES ROOTS IN DIFFERENT ECOLOGIES
2013; Pakistan Botanical Society; Volume: 45; Linguagem: Inglês
ISSN
2070-3368
AutoresAlia, Aftab Afzal, S. Khokhar, Bushra Jabeen, Saeed Ahmad Asad,
Tópico(s)Mycorrhizal Fungi and Plant Interactions
ResumoForty 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 1.95x10 7 in lady’s finger to 5.33x10 9 in turnip in Mansehra area. It ranged from 1.9x10 6 in spinach to 1.3x10 9 in field mint in Taxila area while in Islamabad up to 8x10 5 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.
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