<p>A, Stomatal aperture in <i>V. faba</i> epidermal peels incubated with DH5α at the indicated concentrations; B, Stomatal aperture in <i>V. faba</i> epidermal peels incubated with mock or DH5α at 10<sup>8</sup> CFU/ml. Results represent means of three replicates ±SEM, (n = 120 stomata).</p