Abstract
The effect of supercritical fluid (SCF) extracts of giant knotweed (Reynoutria sachalinensis) on the photosynthetic activity of Vicia faba L. bean leaves was studied by the slow fluorescence induction (SFI) and thermoluminescence (TL) methods. The treatment of plants enhanced their photosynthetic activity. The maximum stimulating effect was observed for an extract prepared using carbon dioxide containing 2% ethanol as a cosolvent. The observed stimulating effect is believed to be associated with an increase in the number of electron carries in the photosynthetic electron transport chain of plant leaves due to the flux of quinonic compounds into plant cells.
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