Green light control of plant form and function

Folta, Kevin M.; Maruhnich, Stefanie A.; Dhingra, Anuradha; Kumar, Deepesh

doi:10.1016/j.cbpa.2007.01.501

Cited by 1 publication

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“…Contrary to conventional fluorescent tubes which are used as universal light source, the LEDs can be fine tuned for specific purpose (eg optimized for particular plant species, induction of flowering, change of morphology). Since it has been shown many times that light of various wavelengths acts not only as the energy source for photosynthesis but also as an effective growth regulator [ 2 , 21 , 25 ], we wanted to see whether two light sources with principally different spectral qualities could both be used in growth chambers to grow healthy experimental plants and what would be the impact of different light spectra on various physiological experiments. In some settings it might be important to compare the older experimental data gained using fluorescent tubes with newer datasets obtained from plants grown under LED illumination.…”

Section: Discussionmentioning

confidence: 99%

Growth and stress response in Arabidopsis thaliana, Nicotiana benthamiana, Glycine max, Solanum tuberosum and Brassica napus cultivated under polychromatic LEDs

et al. 2015

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BackgroundThe use of light emitting diodes (LEDs) brings several key advantages over existing illumination technologies for indoor plant cultivation. Among these are that LEDs have predicted lifetimes from 50–100.000 hours without significant drops in efficiency and energy consumption is much lower compared to traditional fluorescent tubes. Recent advances allow LEDs to be used with customized wavelengths for plant growth. However, most of these LED growth systems use mixtures of chips emitting in several narrow wavelengths and frequently they are not compatible with existing infrastructures. This study tested the growth of five different plant species under phosphor coated LED-chips fitted into a tube with a standard G13 base that provide continuous visible light illumination with enhanced blue and red light.ResultsThe LED system was characterized and compared with standard fluorescence tubes in the same cultivation room. Significant differences in heat generation between LEDs and fluorescent tubes were clearly demonstrated. Also, LED lights allowed for better control and stability of preset conditions. Physiological properties such as growth characteristics, biomass, and chlorophyll content were measured and the responses to pathogen assessed for five plant species (both the model plants Arabidopsis thaliana, Nicotiana bentamiana and crop species potato, oilseed rape and soybean) under the different illumination sources.ConclusionsWe showed that polychromatic LEDs provide light of sufficient quality and intensity for plant growth using less than 40% of the electricity required by the standard fluorescent lighting under test. The tested type of LED installation provides a simple upgrade pathway for existing infrastructure for indoor plant growth. Interestingly, individual plant species responded differently to the LED lights so it would be reasonable to test their utility to any particular application.Electronic supplementary materialThe online version of this article (doi:10.1186/s13007-015-0076-4) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%