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).采用图基HSD检验（Tukey HSD test）开展的三因素方差分析（Three-way ANOVA）结果显示：接种时间（P=1.28×10⁻⁶）与施加的孢子浓度（P=8.18×10⁻⁹）均对生菜根际中FZB42-Rif的总菌落形成单位（CFU, Colony-Forming Units）密度产生了显著影响。接种时间对菌体密度亦具有显著影响（P=0.001025）。不同大写字母表示：在同一柱状分组内，依据施加的孢子浓度（10⁶、10⁷、10⁸ spores/ml）划分的FZB42-Rif总CFU密度间存在显著差异；不同小写字母则表示：在同一时间点的同一柱状分组内，孢子与营养体细胞的密度间存在显著差异。星号表示：FZB42-Rif的密度与播种时的CFU密度，或播种后2周时的孢子、营养体细胞密度相比，存在显著差异。