Figure 7.

Colonisation of Kalanchoe roots by bacterial strains DD6 and EC9. (a) Representative pictures of roots of plants treated under axenic conditions with equal concentrations of the bacterial strains, first in MS medium containing 1% sucrose for 1 day (upper panel) and then for 6 days in MS medium without sucrose (lower panel). The bacterial cells were stained with Syto-13 and visualised by confocal microscopy. The scale bars represent 100 μm. (b) Quantification of colonisation persistence by CFU counting at different time points after treatment. All the roots from individual plants were used. Error bars represent standard error of the mean, n = 3. Within each time point, different letters indicate significant differences at p ≤ 0.05.