Figure 4

Stilbene content in knotweed rhizomes. Stilbene contents (± S.E) in the belowground biomass of the control plants of three clones at the two soil N levels in 2007, expressed as resveratrol including resveratrol contained in all its derivatives measured. FJ = Fallopia japonica, FBM = Fallopia xbohemica from Mošnov, FBP = Fallopia xbohemica from Průhonice. For both soil N levels, the same letters indicate non-significant differences, n = 6.