Figure 6.

Graphical representation of correlations between taxa (P<0.05) that change sign (positive to negative or vice versa) between unplanted controls and the rhizosphere of each willow cultivar. Nodes represent OTUs (90% nucleotide similarity), and nodes with four or more changed correlations are enlarged. The consensus taxonomy for each major node is provided in the legend. Node shapes indicate whether the OTU belongs to the Bacteria (circle) or Fungi (triangle). Node coloring indicates whether the OTU is more abundant in the unplanted control plots (gray) or the rhizosphere of the specified cultivar (black). Connecting lines indicate whether the correlation has switched to a positive correlation (solid blue) or a negative correlation (dashed red) in the presence of the cultivar. The legend for node labels is provided as Supplementary Table 1.