Abstract
The use of photoconversion coatings is a promising approach to improving the quality of light when growing plants in greenhouses in low light conditions. In this work, we studied the effect of fluoropolymer coatings, which produce photoconversion of UV-A radiation and violet light into blue and red light, on the growth and resistance to heat stress of tomato plants (Solanum lycopersicum L.). The stimulating effect of the spectrum obtained as a result of photoconversion on plant growth and the activity of the photosynthesis process are shown. At the same time, the ability to withstand heat stress is reduced in plants grown under a photoconversion coating. Stress electrical signals, which normally increase resistance, in such plants have a much weaker protective effect on the photosynthetic apparatus. The observed effects are apparently explained by a decrease in the concentration of H2O2 in plants grown using photoconversion technologies, which leads to a shift in the development program towards increased productivity to the detriment of the protective function. Thus, when using photoconversion technologies in agricultural practice, it is necessary to pay increased attention to maintaining stable conditions during plant cultivation.
Highlights
Improving the efficiency of greenhouses is an urgent problem in agriculture
We studied the effect of fluoropolymer coatings, which produce photoconversion of UV-A radiation and violet light into blue and red light, on the growth and resistance to heat stress of tomato plants (Solanum lycopersicum L.)
In our previous works [10,14], we showed that fluoropolymer coatings, which produce photoconversion of UV-A radiation and violet light into blue and red light, stimulate the growth, development and yield of plants but inhibit heat-induced electrical signals
Summary
Improving the efficiency of greenhouses is an urgent problem in agriculture. In temperate and polar latitudes, one of the most serious problems is insufficient illumination, in particular at wavelengths used in the course of photosynthetic reactions. Research on photoactive coatings for greenhouses has focused mainly on three aspects: protection against near-infrared radiation, protection against UV radiation and the conversion of photons of photosynthetically inactive spectral ranges into blue and red light [8,9,10,11]. The latter approach seems especially promising, since it demonstrates a significant stimulating effect on morphometric parameters and the activity of physiological processes in various plant species [10,11,12,13,14,15]
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