Figure 2. The total number of metabolites in (a – c) leaves or (d – f) roots that were uniquely up- and down-regulated in plants grown in microcosms with different neighbors (PPI) or different soil legacies (PSI). Metabolites uniquely regulated in the plant-plant interaction (PPI) experiment are depicted in orange. Metabolites uniquely regulated in plant-soil interaction (PSI) experiment are depicted in violet. Overlapping areas indicate the number of up- and down-regulated metabolites in both experiments. The number depicted is in comparison to the monoculture diversity/soil legacy level.