Dynamic LED lighting in greenhouse horticulture:  controlling and monitoring photosynthesis, morphology and growth

From autumn to spring, greenhouse horticulture makes extensive use of artificial lighting to provide extra assimilation light for plant growth. Light-emitting diodes (LEDs) are excellent light sources of assimilation light and expected to be a more energy-efficient alternative to traditional high-pressure sodium lamps. In addition to providing an irradiance required by photosynthesis, LEDs can also be used to control the spectrum (color composition) of assimilation light, which is impossible with the traditional light sources and which allows manipulation of the plants photomorphogenetic responses.
This adds a new and challenging control factor to further optimize plant production and save energy. Light spectrum and intensity influence plant biomass production at several levels: via direct effects on leaf photosynthesis, but also via effects on plant morphogenesis and developmental processes, which interrelate with photosynthesis on plant and crop scale.

This research project aims to produce an integrated description of the effects of LED lighting on the plant photosynthesis and growth in the short and long time frames with the aim of optimizing the use of LED lighting for plant productivity. The programme therefore investigates not only the effects of the spectrum and intensity of LED lighting on leaf photosynthesis and its acclimation but also how spectrum and intensity of LED lighting affects plant photomorphogenesis, growth and development in the longer term. 

This project is done under the supervisoion of the Horticultural Supply Chains group, which is part of the Plant Sciences Department of Wageningen. University


Sneller groeien met LED-verlichting

In samenwerking met Philips is het praktijkcentrum van Wageningen UR Glastuinbouw in Bleiswijk verschillende proeven gestart met LED-verlichting. Dit kan mogelijk de fotosynthese vergroten. Drie promovendi nemen deel aan het onderzoek in het kader van BioSolar Cells. Lees meer hierover in de Resource van 30 mei 2013.

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