Spectrum Conversion Film for Regulation of Plant Growth

Cultivation of Solanum lycopersicum under Glass Coated with Nanosized Upconversion Luminophore

“…Before making assumptions about the reasons for the positive effect of the PCF, it should be noted that the passing of light through glass coated with luminescent nanopar-ticles was not accompanied by a noticeable increase in the intensity of the visible range. However, in the present work, as well as in a number of other works, an increase in plant productivity was demonstrated [25][26][27][28][29][30][31][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Nanosized particles can act as a protectant against UV owing to their capability to absorb and scatter ultraviolet radiation.…”

Plant Responses to UV Blocking Greenhouse Covering Materials: A Review

“…Cucumber leaf area and dry matter were affected by UV blocking material, showing an increase when they were grown under UV exclusion conditions [52,60]. The same positive reaction was also evident in tomato [25], guar, urad and mung beans [36], eggplant [27], radish and welsh onion [44], broccoli and turnip (Brassica rapa L.) seedlings [47], soybean [49] and roses [54]. Lastly, a neutral reaction of plant leaf growth under UV blocking materials was only found in some wheat varieties [34], rapeseed [38], and pea (Pisum sativum) [45], while a negative response was stated for strawberry plants; but this parameter was not affected by the different UV blocking materials [43].…”

“…In Japan, it was found that radish and welsh onion (Allium fistulosum L.) germination failure was higher under UV low conditions. It was also found that there was a negative effect on the germination and hypocotyl length of sunflower and blue star (Isotoma axillaris L.) under the UV blocking film [44].…”

“…Welsh onion and radish shoot fresh weight under photoselective red and blue films (low UV levels) was found to be greater than in UV open films. Shoot dry weight was higher under red films followed by blue (UV blocking) and clear film, respectively [44].…”

“…• PE films, tested in Finland [17], Israel [18], Spain [19][20][21][22], UK [10,[23][24][25], Greece [26][27][28], Serbia [29], Germany [30], USA [31] and Australia [32]; • Polyester tested in USA [33], Finland [17], India [34][35][36], Italy [37] and China [38]; • PVC films tested in Japan [39]; • Plexiglas tested in Belgium [40] and Germany [41]; • Ethylene-tetrafluorethylene (ETFE) films tested in Germany [42,43]; • EVA films tested in Japan [44] and in Ethiopia [45]; • Cellulose diacetate tested in USA [33], China [38], in Japan [46], and Bangladesh [47,48]; • Teflon and polycarbonate (PC) films tested in USA [49].…”