High distribution of arsenic (As) in plants especially in rice causes havoc in West Bengal and Bangladesh. In the present study, rhizospheric microbes grown in As contaminated soil of West Bengal, India were isolated and characterized for their As resistant potential and bioremediation potential. Out of three selected bacteria from different site, bacterial isolates (BBAU/CH) showed good growth, high tolerance and resistant to the level of 100mM of As (III). Further, As (III) treated rice plant inoculated with isolated bacterial strain (BBAU/CH) showed increased growth of the rice plant in term of root length, shoot length, fresh weight and chlorophyll content. In addition, rice inoculated with bacterial strain exhibited reduced lipid peroxidation, H2O2 production, induces antioxidants (cysteine, GSH, and GSSG) and enzymatic activities (SOD, CAT, and GR) were also observed in rice root and shoot. Reduced translocation and accumulation root (2 fold) and shoot (1.5 fold) of As in rice inoculated with bacterial strain was also observed. Thus, bacterial strain BBAU/CH could be used as potential organism in as bioremediation and growth enhancer of paddy plant.
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