Abstract:The effect of upconverting luminescent nanoparticles coated on glass on the productivity of Solanum lycopersicum was studied. The cultivation of tomatoes under photoconversion glass led to an increase in plant productivity and an acceleration of plant adaptation to ultraviolet radiation. An increase in the total leaf area and chlorophyll content in the leaves was revealed in plants growing under the photoconversion glass. Plants growing under the photoconversion glass were able to more effectively utilize the … Show more
“…On the one hand, an increase in respiration intensity may indicate an increase in growth processes associated with the accumulation of biomass; on the other hand, increased respiration activity is a sign of stress in plants. Previously, in a series of works by different scientific groups, it was shown that relatively small changes in the lighting spectrum of plants caused by photoconversion covers have a significant effect on both the productivity of plants and the intensity of physiological processes in them [26][27][28][29][30]33,35,36,55,[89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105], which correlates with our data.…”
Section: Supplementary Materialssupporting
confidence: 91%
“…Currently, special photoconversion covers are being actively developed that absorb light of certain wavelengths and convert it into light of another wavelength. Typically, PCCs absorb light beyond photosynthetically active radiation (PAR, 400-700 nm) [26][27][28][29][30][31][32], as well as green photons [33][34][35][36], due to the relatively low plant requirement for them. These covers re-emit in the PAR region, increasing its intensity as well as changing the ratio of spectral bands, triggering the plants' regulatory mechanisms.…”
In this work, we investigated the effect of photoconversion covers based on ruby (chromium-doped alumina (Al2O3:Cr3+)) particles (PCC-R) on the growth and development of lettuce (Lactuca sativa) plants. Ruby particles (from 100 nm to 2 μm) were obtained by the sequential application of spall laser ablation and further laser fragmentation. The content of chromium ions relative to aluminum ions in the nanoparticles was 3.3 × 10−3. The covers with different densities of applied ruby particles (2 × 107 m−2 (PCC-R7), 2 × 108 m−2 (PCC-R8), 2 × 109 m−2 (PCC-R9)) were studied in the present work. The PCC-Rs had two wide bands of luminescence excitation. The first one was from 350 nm to 450 nm with a maximum at 405 nm, and the second one was from 500 nm to 600 nm with a peak at 550 nm. Synthesized covers emitted in the range of 650 nm to 750 nm, with a peak at 695 nm. It has been shown that PCC-R8, in contrast to PCC-R7 and PCC-R9, provided an increase in yield by 40% and was characterized by increased water use efficiency during dark respiration and assimilation of carbon dioxide in plants. It is assumed that the observed positive effect of PCC-R8 photoconversion covers is associated with the activation of regulatory mechanisms due to a qualitative change in the light spectrum.
“…On the one hand, an increase in respiration intensity may indicate an increase in growth processes associated with the accumulation of biomass; on the other hand, increased respiration activity is a sign of stress in plants. Previously, in a series of works by different scientific groups, it was shown that relatively small changes in the lighting spectrum of plants caused by photoconversion covers have a significant effect on both the productivity of plants and the intensity of physiological processes in them [26][27][28][29][30]33,35,36,55,[89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105], which correlates with our data.…”
Section: Supplementary Materialssupporting
confidence: 91%
“…Currently, special photoconversion covers are being actively developed that absorb light of certain wavelengths and convert it into light of another wavelength. Typically, PCCs absorb light beyond photosynthetically active radiation (PAR, 400-700 nm) [26][27][28][29][30][31][32], as well as green photons [33][34][35][36], due to the relatively low plant requirement for them. These covers re-emit in the PAR region, increasing its intensity as well as changing the ratio of spectral bands, triggering the plants' regulatory mechanisms.…”
In this work, we investigated the effect of photoconversion covers based on ruby (chromium-doped alumina (Al2O3:Cr3+)) particles (PCC-R) on the growth and development of lettuce (Lactuca sativa) plants. Ruby particles (from 100 nm to 2 μm) were obtained by the sequential application of spall laser ablation and further laser fragmentation. The content of chromium ions relative to aluminum ions in the nanoparticles was 3.3 × 10−3. The covers with different densities of applied ruby particles (2 × 107 m−2 (PCC-R7), 2 × 108 m−2 (PCC-R8), 2 × 109 m−2 (PCC-R9)) were studied in the present work. The PCC-Rs had two wide bands of luminescence excitation. The first one was from 350 nm to 450 nm with a maximum at 405 nm, and the second one was from 500 nm to 600 nm with a peak at 550 nm. Synthesized covers emitted in the range of 650 nm to 750 nm, with a peak at 695 nm. It has been shown that PCC-R8, in contrast to PCC-R7 and PCC-R9, provided an increase in yield by 40% and was characterized by increased water use efficiency during dark respiration and assimilation of carbon dioxide in plants. It is assumed that the observed positive effect of PCC-R8 photoconversion covers is associated with the activation of regulatory mechanisms due to a qualitative change in the light spectrum.
“…Excitation of Sr0.76Ba0.20Yb0.02Er0.02F2.04 nanoparticles by IR radiation at a wavelength of 975 nm induced photoluminescence with characteristic Er 3+ /Yb 3+ emission bands in the red (about 660 nm) and green (545 nm and 525 nm) regions of the spectrum (data not shown), which corresponds to the luminescence spectra of SrF2 single crystals doped with Er 3+ and Yb 3+ [17,[21][22][23][24].…”
The effect of coatings containing upconversion luminescent nanoparticles on the cultivation of Solanum lycopersicum has been studied. Sr0.76Ba0.20Yb0.02Er0.02F2.04 particles capable of converting infrared radiation into visible light (λem = 660 nm, 545 nm, and 525 nm) were used as the phosphor. It was shown that the cultivation of tomatoes under photoconversion coatings accelerated the adaptation of plants to ultraviolet radiation. A more efficient distribution of the energy of absorbed light between the processes of photosynthesis and thermal dissipation under upconversion coatings was revealed. As a result, plants grown under photoconversion coatings increased the number and total leaf area, stem length, and leaf chlorophyll content.
“…The other important photoconversion process involves the conversion from the non-PAR to PAR, which leads to an increase in the photosynthetic photon flux density (PPFD) and thus potentially augments photosynthesis. Some representative examples include the downconversion of UV radiation to blue [ 75 ] or red [ 76 , 77 ] radiation, and the upconversion of far-red radiation to red [ 78 ] or blue radiation [ 79 ]. UV radiation usually produces photochemical damage to the cell, reduces photosynthesis, and lowers biomass accumulation of plants [ 80 ].…”
Section: Spectral Conversion Materials In Agriculturementioning
confidence: 99%
“…Strawberry fruit qualities of such as fruit weight, sweetness, sweet/acid ratio, and firmness were promoted under the spectral conversion film. To date, numerous spectral conversion materials have been explored and investigated for plant growth, depending on the luminescent properties of materials and the plant species, such as Eu 3+ -modified cellulose acetate film [ 88 ], CdZnSe QDs-based fluoropolymer film [ 89 , 90 ], Sr 2 Si 5 N 8 :Eu 2 t-based cellulose film [ 91 ], upconversion nanoparticles-based polymer film [ 78 ], organic dye-containing polyethylene/ polymethylmethacrylate (PMMA) film [ 92 , 93 ], and so forth. Fig.…”
Section: Spectral Conversion Materials In Agriculturementioning
Photosynthesis is the most important biological process on Earth that converts solar energy to chemical energy (biomass) using sunlight as the sole energy source. The yield of photosynthesis is highly sensitive to the intensity and spectral components of light received by the photosynthetic organisms. Therefore, photon engineering has the potential to increase photosynthesis. Spectral conversion materials have been proposed for solar spectral management and widely investigated for photosynthesis by modifying the quality of light reaching the organisms since the 1990s. Such spectral conversion materials manage the photon spectrum of light by a photoconversion process, and a primary challenge faced by these materials is increasing their efficiencies. This review focuses on emerging spectral conversion materials for augmenting the photosynthesis of plants and microalgae, with a special emphasis on their fundamental design and potential applications in both greenhouse settings and microalgae cultivation systems. Finally, a discussion about the future perspectives in this field is made to overcome the remaining challenges.
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