Washed bacterial cells were added to the system in two
different concentrations, either log 7.5 cells or log 5.2 cells mL1
nutrient solution. A control treatment, with addition of log 7.5 cells
mL1 nutrient solution and no pathogen addition, was included
and confirmed that addition of high concentration of P. koreensis
2.74 did not affect the growth of the plant. For the infected treatment
receiving the higher concentration of cells no significant
differences in plant weight was observed compared with the
uninfected control. In the treatment receiving the lower concentration
of cells the root weight was affected and not significantly
higher than for the infected control. However, no significant
differencewas found when comparing the weight or leaf area of the
lettuce with the uninfected control for this treatment.