Figure 11From: Factors influencing the production of stilbenes by the knotweed, Reynoutria × bohemicaDiagram of relationships between root and rhizome Reynoutria × bohemica characteristics (resveratrol, stilbenes, emodin, phosphorus and nitrogen contents and biomass) measured in 2007, melilot biomass measured in preceding year and phosphorus and nitrogen contents in the substrate, all in the absence and presence of melilot, respectively. Correlation coefficients are shown in cases of relationships that were significant at P ≤ 0.05.Back to article page