Key words: supercritical fluid extraction, Reynoutria sachalinensis, slow fluorescence induction, thermoluminescence
The effect of supercritical fluid (SF) extracts of giant knotweed Reynoutria sachalinensis on photosynthetic activity of Vicia faba L. bean leaves was studied by slow fluorescence induction (SFI) and thermoluminescence (TL) methods. The treatment of plants with extracts led to the enhancement of their photosynthetic activity. The maximum stimulating effect was observed for extract obtained using carbon dioxide with 2% of ethanol as co-solvent. The observed stimulating effect is assumed to be bound with increasing of carries pool of the photosynthetic electron transport chain of plant leaves by quinonic compounds flux into plant cells.