Colonization densities of Bacillus amyloliquefaciens FZB42-Rif on lettuce root in pot experiments in respect to applied spore numbers.

Three-way ANOVA according to Tukey HSD test revealed that the time (P = 1.28 10−6) and the applied spore numbers (P = 8.18 10−9) significantly affected the total density (CFU) of FZB42-Rif in the rhizosphere of lettuce. Time had a significant influence on the density of cells (P = 0.001025). Different capital letters denote significant differences between total densities (CFU) of FZB42-Rif depending on applied spore numbers (106, 107, 108 spores/ml) per column and different small letters between densities of spores and vegetative cells per column (at the same time point). The asterisk denote significant differences in density of FZB42-Rif compared to density at planting (CFU) or to density 2 weeks after planting (spores, vegetative cells).