Fig. 3.

Detection of volatile rhizosphere chemicals collected in different compartments of the novel rhizosphere mesocosm (a) with substrate and Taraxacum sect. ruderalia plants and (b) without plants, but with substrate (= control); example TIC (total ion chromatograms) of volatiles. The percentage of dandelion compound peak areas of all detected compounds (unlabeled peaks were also found in plant-free controls) was highest in the central compartment (Mean ± SD: 23.5 ± 8.7 %) compared to substrate and drainage compartments (Mean ± SD: 5.1 ± 10.4 % and 19.6 ± 8.9 %)