Luminescent and physiological indices of bean plants under the treatment of seeds with epibrassinolide

The treatment of bean seeds with epibrassinolide (the preparation “Epin-Extra”) resulted in the increase in fluorescent parameter (FM−FT)/FT of plants grown from these seeds, indicating the increase in the photosynthetic activity of the plants. The treatment of bean seeds with epin led to the increase in chlorophyll content and also in the acceleration of plant growth. Fluorescence quenching after switching on the actinic light in experimental plants was faster than in control ones which may indicate increased adaptive capabilities of the photosynthetic apparatus.