Figure 4 . Taxa barplots for Samples from root and rhizosphere soil. Relative abundances of bacterial taxa identified based on reference to SILVA database v138. Prior to plotting abundance tables were filtered for rare ASVs and outlier samples were removed. A) Phylum level barplot shows relative abundances of identified taxa aggregated on phylum level for root (top) and soil (bottom) compartments for each replicate grouped by treatment. The bacterial microbiota was dominated by Proteobacteria. B) Relative abundances of only Proteobacteria, colored by order level for a detailed resolution of Proteobacteria taxa composition.