Published

2014-05-01

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

Análisis del crecimiento en plantas de acelga (Beta vulgaris L. Cicla, cv. 'Pencas Blancas') expuestas a diferente calidad de luz

DOI:

https://doi.org/10.15446/agron.colomb.v32n2.42640

Keywords:

color, dry weight, leaf area, light quality, leafiness indices, growth rates (en)
color, peso seco, área foliar, calidad de luz, índices de foliación, tasas de crecimiento (es)

Authors

  • Fánor Casierra-Posada Universidad Pedagógica y Tecnológica de Colombia (UPTC). Tunja
  • Esteban Zapata-Casierra Universidad Tecnológica de Pereira (UTP). Pereira
  • Daniel A. Chaparro-Chaparro Universidad Pedagógica y Tecnológica de Colombia (UPTC). Tunja
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.
Para evaluar el efecto de la calidad de la luz sobre los índices de crecimiento en vegetales, plántulas de acelga, cultivar Pencas Blancas, crecieron durante 2 meses expuestas a cinco tratamientos diferentes de luz obtenidos mediante el filtrado de la luz solar a través de filtros de polietileno de diferentes colores. Los tratamientos comprendieron coberturas de colores rojo, azul, verde, amarillo y transparente. La cobertura transparente (luz blanca) se tomó como control. Las coberturas coloreadas afectaron el crecimiento vegetal. Las plantas que crecieron bajo la cobertura amarilla mostraron mejor comportamiento en relación con el crecimiento, tomado como el peso seco total de las plantas, el área foliar, el área específica de las hojas, la tasa de crecimiento absoluto, la tasa de crecimiento relativo, la masa seca cosechable y la relación raíz/parte aérea. La acumulación de masa seca en hojas y raíces fue afectada por la calidad de la luz, no así en los peciolos. Se encontró mayor acumulación de masa seca en hojas de plantas que crecieron bajo la cobertura amarilla. Como consecuencia del incremento en el área foliar en plantas que estaban bajo la cobertura amarilla, estas presentaron mayor volumen de agua consumida. Por otro lado, el mayor valor de la tasa de asimilación neta se encontró en plantas colocadas bajo la cobertura transparente. Estos resultados abren la posibilidad de utilizar la cobertura amarilla en hortalizas de hoja y especialmente en plantas de acelga cultivadas bajo condiciones controladas.

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Casierra-Posada, F., Zapata-Casierra, E., & Chaparro-Chaparro, D. A. (2014). Growth analysis in chard plants (Beta vulgaris L. Cicla, cv. ’Pencas Blancas’) exposed to different light quality. Agronomía Colombiana, 32(2), 205-212. https://doi.org/10.15446/agron.colomb.v32n2.42640