Additional file 4: of Structural variability and niche differentiation in the rhizosphere and endosphere bacterial microbiome of field-grown poplar trees

Plant compartment effect on the individual bacterial phyla. Values represent average number of reads (±standard error) and relative read abundances (%) based on 15 biological replicates (rhizosphere soil and root samples) and 11 replicates (stem and leaf samples) after normalization to 2000 sequences. Normal distributions of the data were checked with the Shapiro–Wilk test and homoscedasticity of variances was analyzed using either Bartlett’s or the Fligner–Killeens test. The ANOVA model was [OTU] ~ compartment and included all four plant compartments followed by Tukey’s honest significant differences post hoc tests. Plant compartment effects show the overall ANOVA results: F(DFn, DFd) and P value. Significant differences at the 95% confidence interval (P