Effect of Up-Converting Luminescent Nanoparticles with Increased Quantum Yield Incorporated into the Fluoropolymer Matrix on <i>Solanum lycopersicum</i> Growth
Denis V. Yanykin | Dmitriy E. Burmistrov | Alexander V. Simakin | Julia A. Ermakova | Sergey V. Gudkov
The influence of light conversion induced by glasses coated with up-converting luminescent nanoparticles on <i>Solanum lycopersicum</i> cultivation was studied. Nanoparticles of Sr<sub>0.46</sub>Ba<sub>0.50</sub>Yb<sub>0.02</sub>Er<sub>0.02</sub>F<sub>2.04</sub> solid solution were used as the up-converting luminophore. These nanoparticles were able to transform IR radiation into visible light (λ<sub>em</sub> = 660 nm with minor peaks at 545 nm and 525 nm). By applying the “variable” chlorophyll fluorescence (ΔF), it was shown that the cultivation of tomatoes under the photoconversion glasses stimulated changes in the rate of plant adaptation to ultraviolet radiation. The restoration time of values of effective quantum yield of photosystem II photochemical reactions and photochemical quenching of chlorophyll fluorescence (reflecting disappearance of imbalance between photosynthetic electron transport and the utilization of NADPH) was reduced from three weeks to three days in the case of control and photoconversion films, respectively. As a result, plants grown under photoconversion glass had an increased leaf number (12.5%), total leaf area (33%), stem length (35%) and chlorophyll content in the leaves (two-fold). It is assumed that an increase in the proportion of red light in the growing spectrum has a positive effect on photosynthetic activity and plant growth.
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