Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
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Response of Growth and Development of Young Tomato Plants to End-of-day Monochromatic Light from Various LEDs

  • Khoshimkhujaev, Bekhzod (Protected Horticulture Research Institute, National Institute of Horticultural & Herbal Science) ;
  • Kwon, Joon Kook (Protected Horticulture Research Institute, National Institute of Horticultural & Herbal Science) ;
  • Lee, Jae Han (Protected Horticulture Research Institute, National Institute of Horticultural & Herbal Science) ;
  • Choi, Hyo Gil (Protected Horticulture Research Institute, National Institute of Horticultural & Herbal Science) ;
  • Park, Kyoung Sub (Protected Horticulture Research Institute, National Institute of Horticultural & Herbal Science) ;
  • Kang, Nam Jun (Institute of Agriculture and Life Science, Gyeongsang National University)
  • Received : 2015.08.31
  • Accepted : 2016.08.02
  • Published : 2016.10.31
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Abstract

Plant growth and development strongly influenced by light quantity and its spectral composition. Young tomato plants were cultivated in growth cabinets under artificial light provided by red and blue light emitting diodes(LEDs) during 12 hours, then plants were exposed to monochromatic ultraviolet, blue, green and red lights as an end-of-day(EOD) treatment during 4 hours to study their effect on plant growth parameters. EOD lighting from various LEDs increased total fresh and dry weights as well as assimilation area compared to those in control. Blue light increased stem height, internode length and stem diameter. Monochromatic UV-A light reduced stem elongation, highly increased stomatal conductance. Compactness and health index of young tomato plants were increased in UV-A and red light treatments.

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