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Development of a Variable-Spectra LED Array for Optimized Plant Development

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dc.contributor.advisor Dixon, Mike
dc.contributor.author Hawley, David
dc.date.accessioned 2013-12-18T21:03:07Z
dc.date.available 2013-12-18T21:03:07Z
dc.date.copyright 2013-12
dc.date.created 2013-12-02
dc.date.issued 2013-12-18
dc.identifier.uri http://hdl.handle.net/10214/7718
dc.description.abstract Plant development can be dramatically influenced by the quality of light present in its environment. Conventional plant lighting systems do not allow for fine control of light quality, which may not be optimal for all species. To address this problem, a novel lighting system was developed using narrow-bandwidth, multi-coloured LEDs. This system was used to test the effects of different light qualities on germination rate, photosynthesis during vegetative growth, and the photosynthetically adaptive nature of several species. It was found that far red light and blue light can significantly inhibit germination in some species. Red and deep red light was generally most effective at driving photosynthesis during vegetative growth. Plants were shown to have an impaired photosynthetic capacity when abruptly switched to a new light quality. Optimizing germination and photosynthesis are the first steps in designing optimal light “recipes” for plant production. en_US
dc.description.sponsorship NSERC, Canadian Space Agency, COM DEV International en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-NoDerivs 2.5 Canada *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ *
dc.subject LED en_US
dc.subject plant en_US
dc.subject royal blue en_US
dc.subject blue en_US
dc.subject cyan en_US
dc.subject green en_US
dc.subject amber en_US
dc.subject red en_US
dc.subject deep red en_US
dc.subject far red en_US
dc.subject photosynthesis en_US
dc.subject carbon fixation en_US
dc.subject PAR en_US
dc.subject tomato en_US
dc.subject lettuce en_US
dc.subject pepper en_US
dc.subject germination en_US
dc.subject photoblastic en_US
dc.subject adaptation en_US
dc.subject light quality en_US
dc.title Development of a Variable-Spectra LED Array for Optimized Plant Development en_US
dc.type Thesis en_US
dc.degree.programme Environmental Sciences en_US
dc.degree.name Master of Science en_US
dc.degree.department School of Environmental Sciences en_US
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Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada