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*[[Zeitlupe]]: blue light entrainment of the [[circadian clock]]
*[[Phytochrome]]: red and far-red light reception
All the photoreceptors listed above allow plants to sense light with wavelengths range from 280nm (UV-B) to 750nm (far-red light). Plants can use light with different wavelengths as their environment cue for the initiation of important developmental transitions.<ref>{{Cite journal|last=Galvão|first=Vinicius Costa|last2=Fankhauser|first2=Christian|date=2015-10|title=Sensing the light environment in plants: photoreceptors and early signaling steps|url=https://linkinghub.elsevier.com/retrieve/pii/S0959438815000227|journal=Current Opinion in Neurobiology|language=en|volume=34|pages=46–53|doi=10.1016/j.conb.2015.01.013}}</ref>
In plant seeds, the photoreceptor phytochrome is responsible for the process termed [[photomorphogenesis]]. This occurs when a seed initially situated in an environment of complete darkness is exposed to light. A brief exposure to electromagnetic radiation, particularly that whose wavelength is within the red and far-red lights, results in the activation of the photorecepter phytochrome within the seed. This in turn sends a signal through the signal transduction pathway into the nucleus, and triggers hundreds of genes responsible for growth and development.<ref>Winslow R. Briggs, Margaret A. Olney, Photoreceptors in Plant Photomorphogenesis to Date. Five Phytochromes, Two Cryptochromes, One Phototropin, and One Superchrome, 2003 <http://www.plantphysiol.org/content/125/1/85.full></ref>
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