Figure 12.

Relationship between the ratio of resveratrol contained in its aglycons (resveratrol and piceatannol) to its glucosides (astringines, piceid, resveratrolosid), and differences in nitrogen concentration in belowground biomass of Reynoutria × bohemica grown with Melilotus alba (measured values) and without melilot (average per substrate). ClayC = clay enriched with slow-release biofertilizer Conavit; ClayCS = clay enriched with Conavit and arbuscular-mycorrhizal product Symbivit, both produced by Symbiom Ltd.