Growth analysis in chard plants (Beta vulgaris L. Cicla, cv. 'Pencas Blancas') exposed to different light quality

Abstract

To determine the effects of light quality on the growth indices of plants, Pencas Blancas cultivar chard plantlets were grown for 2 months under five different light treatments, obtained by filtering sunlight through colored polyethylene films. The treatments included: red, blue, green, yellow and transparent cover colors. A transparent cover (white light) was used as the control. The colored covers affected the plant growth. The plants grown under the yellow cover presented a better behavior with regards to growth, taken as: total dry weight per plant, leaf area, specific leaf area, absolute growth rate, relative growth rate, harvestable dry matter and root to shoot ratio. The dry matter partitioning in the leaves and roots was affected by the light quality, but not in the petioles, with a higher accumulation of dry mass in the leaves of plants grown under the yellow cover. As a consequence of the enhanced leaf area in the plants under the yellow cover, they also had the highest water uptake. On the other hand, the highest net assimilation rate value was found in plants grown under the transparent cover. These results open up the possibility of using yellow colored cover in leafy green vegetables, especially in chard plants grown under controlled conditions.

Regulations and Factors Affecting of Light Emitting Diodes Artificial Light in Crop Production under Soilless Culture

“…The red light (600–699 nm) and far-red light (700–780 nm), 16 h day photoperiod, 85 μmol m –2 s –1 photosynthetic photon flux density induced better growth in water melon . The combination of 630 nm red light + 660 nm red light + 450 nm blue light + 460 nm blue light improved morphological and physiological activities in melon with 12 h photoperiod under plastic house …”

“…42 The combination of 630 nm red light + 660 nm red light + 450 nm blue light + 460 nm blue light improved morphological and physiological activities in melon with 12 h photoperiod under plastic house. 43 Light Requirements in Ornamental Crops. The combination of red light + blue light (460−660 nm), blue light + white light (400−500 nm), 16 h/8 h day photoperiod, 50 μmol m −2 s −1 PPFD induced morphological growth in cuttings of chrysanthemum propagated under controlled environment growth room.…”

Influence of Regional Temperature Anomalies on Strawberry Yield: A Study Using Multivariate Copula Analysis

“…With an aim of explaining the influence of regional weather conditions on strawberries, several studies have been carried out [29][30][31]. Some of these studies have shown a critical correlation between strawberry yield and temperature changes [29,30,32].…”

Effect of titanium foliar applications on tomato fruits from plants grown under salt stress conditions

“…In the food industry, titratable acidity, colour, electrical conductivity, firmness, pH, and total soluble solids are considered key indicators defining the quality of tomato fruits. Tomato fruit quality tends to improve in protected agricultural systems as compared to open-air systems, hence various production systems in greenhouses have been implemented, including hydroponics and fertigation, chemical and organic fertilization, and biostimulation by using beneficial elements (Casierra-Posada and Aguilar-Avendaño, 2008;García-Sahagún et al, 2009). Although beneficial elements are not essential for plants, they can stimulate positive responses in certain metabolic processes when applied at low dosages (Trejo-Téllez et al, 2016).…”