Additional file 1: of Structural variability and niche differentiation in the rhizosphere and endosphere bacterial microbiome of field-grown poplar trees

Community estimators. Values represent averages (±standard deviation) of 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. Significant differences in the variance of parameters were evaluated with ANOVA, and post hoc comparisons were conducted by the Tukey’s honest significant differences tests. Plant compartment effects show the overall ANOVA results: F(DFn, DFd) and P value. Significant differences at the 95% confidence interval (P

群落估计量。数值表示经2000条序列标准化后，15次生物学重复（根际土壤与根系样本）及11次重复（茎秆与叶片样本）的平均值（±标准差）。采用Shapiro-Wilk检验（Shapiro–Wilk test）验证数据的正态分布性，并使用Bartlett检验（Bartlett’s test）或Fligner-Killeen检验（Fligner-Killeens test）分析方差同质性。采用方差分析（ANOVA）评估参数方差的显著性差异，并通过Tukey真实显著差异检验进行事后多重比较。植物微区室效应展示了方差分析的整体结果：F(DFn, DFd)及P值。95%置信区间下的显著性差异（P