Fig. 5.—

Percentage of motility and biofilm formation in various mutants as compared with Rhizobium sp. NT-26 wild-type strain. The left and the right panels show the results obtained in mutants affected in motility and As(III) oxidation, respectively. (A) % of swarming motility measured after 24 h. Results are the mean values calculated from the % of three independent experiments. In each experiment, mutant and wild-type strains were tested in triplicates. (B) % of biofilm formation visualized by crystal violet coloration. Results are the % calculated from the mean values of six replicates for each strain.