FIGURE 1.

Changes in the metabolic profiles of oak seedlings in response to (A) soil microbial communities and (B) attacker treatments, visualized in a score plot with the first two components of the PCA model, with the variation explained by the first component on the x-axis, and the variation explained by the second component on the y-axis. (A) Colors represent the different soil microbial communities, from forest and meadow, with 20 replicates per soil community (across attacker treatments). (B) Colors represent the different attacker treatments, including: (1) Healthy oak seedlings, (2) Seedlings attacked by mildew, (3) Seedlings attacked by aphids and (4) Seedlings attacked by mildew and aphids, with 8 replicates per treatment (across soil microbiomes) (for the loadings of these plots, see Supplementary Figure 6; for a visualization of the OPLS-DA model on attacker treatments, see Supplementary Figure 5).