Research Abstract
Three phosphate solubilizing bacteria (PSB) were isolated from contaminated soil and putatively identified as Bacillus sp., Azotobacter sp. and Pseudomonas sp. The maximum amount of P solubilized (3.11 mg/ml) was recorded for Bacillus sp. which also recorded the highest phosphate solubilization index (2.72). Bacterial isolates produced a substantial amount of IAA both in the absence and presence of heavy metals concentrations. A greenhouse pot experiment was conducted to study the effect of isolated (PSB) on the uptake of heavy metals by corn grown on a contaminated soil. The results showed that inoculation of corn plants with PSB isolates caused significantly (p= 0.05) decreases in the uptake of heavy metals by corn plants. The percent decreases in heavy metals uptake induced by Bacillus sp. were 69 %, 70.5 %, 80.7 % and 62.9 % for Zn, Cu, Pb and Cd respectively, compared with control. These results suggested that the PSB inoculant due to its intrinsic abilities of growth promotion and increase the solubility of P in soil could be exploited for phytostabilization of heavy metals contaminated site.
Research Department
Research Journal
International Journal of Environmental Science and Development
Research Member
Research Pages
366-371
Research Publisher
NULL
Research Rank
1
Research Vol
, Vol. 8, No. 5
Research Website
NULL
Research Year
2017
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