Dynamic regulation of photosynthetic processes under variable spectral led irradiation of plants

In natural conditions of plant growth, along with changes in the intensity of light during different periods of time, there is a change in the spectral composition of the incident radiation. The ratio between the blue and red spectral regions changes from » 0.50 for direct radiation of the sun, to » 0.95 for diffuse solar radiation, depending on the height of the sun and the time of day. The work investigated the effect of light of different spectral composition on the functional characteristics of the photosynthetic apparatus of potato plants (Solanum tuberosum L.) of the Zhukovsky Early variety, grown by aeroponics in two vegetation chambers of a phytotron using LEDs sources with preferential irradiation of plants with blue light (LEDs BL, λmax = 470 nm) or red light (LEDs RL, λmax = 660 nm) of the spectral range of photosynthetically active radiation (PAR). With a total PAR intensity of 400±28 μmol · m-2 · s-1, the proportion of blue light was 293...