1. Diversity of aromatic ring-hydroxylating dioxygenase gene in Citrobacter
- Author
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Selvakumaran, S., Kapley, Atya, Kashyap, Sanjay M., Daginawala, Hatim F., Kalia, Vipin C., and Purohit, Hemant J.
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CITROBACTER , *BIODEGRADATION , *AROMATIC compounds , *MIXED culture (Microbiology) , *BIOREMEDIATION , *SEWAGE disposal plants , *CHLOROPHENOLS , *BIOTRANSFORMATION (Metabolism) - Abstract
Abstract: Genetic and functional diversity of Citrobacter spp. for their abilities to degrade aromatic compounds was evaluated to develop mixed cultures or a consortium for bioremediation technology. Thirty Citrobacter strains isolated from various effluent treatment plants were found to degrade a range of aromatic compounds: phenol, benzoate, hydroxy benzoic acid and biotransform mono-chlorophenols and di-chlorophenol within 24 to 48h of incubation at 30°C. Sequence similarity and phylogeny of the ARHD gene transcripts (730 nucleotides) depicted their diversity within 9 Citrobacter strains: HPC255, HPC369, HPC560, HPC570, HPC784, HPC1196, HPC1216, HPC1276 and HPC1299. Here, the degree of associations varied up to 84% with (i) ARHD α-sub unit (SU), (ii) LSU of Phenylpropionate dioxygenase (PDO), (iii) Phenol hydroxylase α-SU, (iv) Benzoate 1,2-dioxygenase, α-SU, (v) Naphthalene dioxygenase LSU, etc. This study has provided basic information, which can be used to develop a consortium of bacteria with mutually beneficial characteristics. [Copyright &y& Elsevier]
- Published
- 2011
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