Table 2. Up- and down-regulated metabolites tentatively
assigned in leaves and roots of Geranium pratense ,Leucanthemum vulgare , and Ranunculus acris . We assigned
the molecular formula and the putative compound name based on the
high-resolution mass-to-charge values generated by liquid chromatography
quadrupole time-of-flight mass spectrometry. Abbreviations: Rt =
Retention time in liquid chromatography in seconds; eV = Fragmentation
energy in electron volt; MS = mass spectrometry; PPI = plant-plant
interaction; PSI = plant-soil interaction.