Figure 8.

Hierarchical Clustering (HCL) of semi-polar metabolome of tomato leaves grown in the absence and in the presence of the aphid M. euphorbiae and the fungus T. harzianum, alone or in combination. Colored squares represent the values of log2-transformed fold changes of a metabolite with respect to the corresponding control (water control CTRL for Aph and T22 samples; T22 for T22Aph), according to the color scale shown (green: down-accumulated; red: up-accumulated). Gray squares indicate no detectable accumulation of the corresponding metabolite. Hierarchical clustering was calculated both on columns and rows, applying the One Minus Pearson correlation with the average linkage algorithm.