Seedling Quality and Photosynthetic Characteristic of Vegetables Grown Under a Spectrum Conversion Film

Abstract

This study aims to investigate the effect of spectrum conversion film on seedling quality and photosynthetic traits of leaf and fruit vegetables. Lettuce, Chinese cabbage, and cucumber seeds were sown in 50-cell plug trays filled with commercial seedling media and grown under a spectrum conversion film (SCF) and a poly-ethylene film as a control. The SCF decreased blue-green light and increased red light, and thereby increased the R/FR ratio and R/B ratio of solar spectrum, which was sufficient to affect the photosynthesis, growth, and morphogenesis of the seedlings. The photosynthetic rates of Chinese cabbage and cucumber were significantly increased under the SCF, and their maximum photosynthetic rates were 23% and 19%, respectively. However, the growth of lettuce was decreased under the SCF, and the plant height and leaf length became longer, resulting in a decrease in seedling quality. Although the morphology of Chinese cabbage grown under the SCF was not changed compared to the control, the leaf dry weight increased and its dwarf rate was 10%. The growth of cucumber under the SCF was similar to that of the control, but the plant height and petiole were significantly reduced, resulting in a high dwarf rate of 24%. It was concluded that the solar spectrum modified by the SCF increased the photosynthetic efficiency and improved the seedling quality of Chinese cabbage and cucumber.

Ruby Nanoparticles for Greenhouse Farming: Synthesis, Features and Application

“…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.…”

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.…”

Two Types of Europium-Based Photoconversion Covers for Greenhouse Farming with Different Effects on Plants

“…Several types of phosphors are used in such covers. The most widely used phosphors now are based on organic dyes [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Despite all their advantages, such phosphors have a significant drawback: they lose their effectiveness very quickly due to light burnout [37].…”