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Isolation and characterization of heavy metal resistant cellulosimicrobium sp. From paper mill polluted soil

Dhritiman Chanda*, Sharma G. D., Jha D. K., F. Al-Otaibi


A Gram-positive, rod-shaped, yellow-pigmented bacterium was isolated from the polluted soil of paper mill contaminated with various heavy metals. The strain was tested for its resistance to different heavy metals (Ni, Cu, Zn and Cd) by the growth in nutrient broth tubes containing various concentrations of (0.1, 0.5, 2.0, 4.0 mM). The relative growths (%) at 2mM concentration were observed as Ni (23.52%)>Zn (20.58%)>Cu (19.20%) > Cd (15.81 %). The heavy metal resistant in the isolated strain was found to be Ni>Zn>Cu>Cd at higher concentrations. The strain showed positive activity towards urease, nitrate, citrate utilization, methyl red, Malonate utilization, starch amylase and showed negative activity against ONPG, H2S production, phynylalanine, Lysine utilization, Voges Proskauer’s (VP) test, catalase and oxidase activity. The strain was found susceptible to various antibiotics Vancomycin, Streptomycin, Rifamycin Amikacin and Ciprofloxacin. In silico study was conducted to understand the major evolutionary relationship among the different strains of Cellulosimicrobium species of nucleotide sequence of 16s ribosomal RNA with the isolated strain (KC602297) of Cellulosimicrobium sp. obtained from Gene Bank.


Heavy metal; Gram (+) positive bacteria; In silico; 16SrRNA; Gene Bank.

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