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.