Fig 2.

Role of exopolysaccharides EPS I and EPS II in motility of S. meliloti. (A) Swimming test in Bromfield medium (0.3% agar). (B) Surface motility on semisolid Bromfield medium (0.6% agar). (C) Surface motility on semisolid MM (0.6% agar). The relevant genotype is indicated under the name of each strain. Pictures were taken 2 days (A), 3 days (B), or 20 h (C) after inoculation. Under each image, the mean and standard deviation of the migration zones (given in millimeters and measured as described in the text) obtained from at least nine measurements are indicated.