FIG. 3.

Colonization of bean by X. fuscans subsp. fuscans strain CFBP4834-R and strains with mutations in hrp genes. Bacterial population densities were determined on bean leaves sampled at 3 h and 1, 4, and 11 days after spray inoculation (1 × 10⁶ CFU ml⁻¹). Means and SEMs were calculated for five leaves per sampling date. Mean population densities followed by different letters are significantly (P < 0.05) different on the basis of the Mann-Whitney test.