Figure 6.

Colonization assays of PsJN and its derivatives in leaves of camelina (Camelina sativa cv. Suneson) (A–C) and pea (Pisum sativum) (D–F). (A,D), Leaves were infiltrated by bacterial suspension using a needleless syringe. The inoculation area was indicated by the dotted line. (B,E) Bacterial populations were recovered from leaves and enumerated on days 0 and 7 by serial dilution plating of the leaf extracts onto KB plates added with Rifampicin (100 μg/ml). (C,F) Relative bacterial population on day 7 under plant drought stress compared with their populations under normal growth conditions. The plant drought stress, indicated by wilting leaf symptoms, was induced by stopping watering for 7 days immediately after the bacterial inoculation. Data represent the mean values of at least three repeats. Error bars show standard deviations. The experiments were repeated two times. * Indicates significant difference, as determined by t-test (p < 0.05).