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Sagar S.,Chhatrapati Sahuji Maharaj University | Dwivedi A.,Chhatrapati Sahuji Maharaj University | Yadav S.,Chhatrapati Sahuji Maharaj University | Tripathi M.,Chhatrapati Sahuji Maharaj University | Kaistha S.D.,Chhatrapati Sahuji Maharaj University
Chemosphere | Year: 2012

Cr(VI), a mutagenic and carcinogenic pollutant in industrial effluents, was effectively reduced by an indigenous tannery effluent isolate Staphylococcus arlettae strain Cr11 under aerobic conditions. The isolate could tolerate Cr(VI) up to 2000 and 5000mgL -1 in liquid and solid media respectively. S. arlettae Cr11 effectively reduced 98% of 100mgL -1 Cr(VI) in 24h. Reduction for initial Cr(VI) concentrations of 500 and 1000mgL -1 was 98% and 75%, respectively in 120h. The isolate was also positive for siderophore, indole acetic acid, ammonia and catalase production, phosphate solubilization and biofilm formation in the presence and absence of Cr(VI). The isolate showed halotolerance (10% NaCl) and cross tolerance to other toxic heavy metals such as Hg 2+, Ni 2+, Cd 2+ and Pb 2+. Bacterial inoculation of Triticum aestivum in controlled petri dish and soil environment showed significant increase in percent germination, root and shoot length as well as dry and wet weight in Cr(VI) treated and untreated samples. This is the first report of simultaneous Cr(VI) reduction and plant growth promotion for a S. arlettae strain. © 2011 Elsevier Ltd. Source

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