Effects of Supplementary LED Lighting on Growth and Biochemical Parameters in Dieffenbachia amoena 'Camella' and Ficus elastica 'Melany'
2010
Heo, J.W., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, Y.B., Rural Development Administration, Suwon, Republic of Korea | Kim, D.E., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Chang, Y.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Chun, C.H., Seoul National University, Seoul, Republic of Korea
To verify the possibility of LEDs as supplementary lighting sources for greenhouse production of foliage plants, growth and development, sugar content, starch content, and chlorophyll and carotenoid contents of potted Dieffenbachia amoena 'Camella' and Ficus elastica 'Melany' plants were investigated. The plant response varied by monochromatic or mixture of blue and red LEDs and by species. In both species, monochromatic red and supplementation with blue plus red LEDs increased plant height and number of unfolded leaves, while the blue plus red LED treatment promoted the uptake and utilization of nitrogen in Ficus plant. Supplementation with any LEDs did not cause any changes in contents of chlorophyll a and b and total carotenoids. Dry weight and starch content of Dieffenbachia and Ficus and the number of branches in Dieffenbachia increased by supplementation with mixture of blue and red LEDs without any negative effects compared with the control treatment. Results indicate that supplementation with mixture of blue and red LEDs, compared to other light treatments, is beneficial for promotion of growth and development without any negative effects on biochemical characteristics in Dieffenbachia and Ficus.
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