Chemotaxis away from 4-Chloro-2-nitrophenol,4-Nitrophenol,and 2,6-dichloro-4-nitrophenol by bacillus subtilis PA-2

Bacterial strain pa-2 exhibits chemotaxis away from 4-chloro-2-nitrophenol,4-nitrophenol,and 2,6-dichloro-4-nitrophenol. this strain was identified as bacillus subtilis on the basis of the 16s rrna gene sequencing. the drop plate assay and the chemical-in-plug method were used to demonstrate negative chemotactic behavior of strain pa-2. the growth studies showed that strain pa-2 did not utilize 4-chloro-2-nitrophenol,4-nitrophenol,and 2,6-dichloro-4-nitrophenol as its sole sources of carbon and energy. this is the first report of negative chemotaxis of 4-chloro-2-nitrophenol,4-nitrophenol,and 2,6-dichloro-4-nitrophenol by any bacterium. © 2015 pankaj kumar arora et al.