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Circadian Clock in Arabidopsis

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Photoreceptors and circadian clocks are universal mechanisms for sensing and responding to the light environment. In addition to regulating daily activities, photoreceptors and circadian clocks are also involved in the seasonal regulation of processes such as flowering. Circadian rhythms govern many plant processes, including movements of organs such as leaves and petals, stomata opening, stem elongation, sensitivity to light of floral induction, metabolic processes such as respiration and photosynthesis and expression of a large number of different genes. In plants, phototransduction not only sets the phase, but also affects the amplitude and period of circadian rhythms. Members of the phytochrome family of plant photoreceptors, which can exist in two photochemically interconversible forms: the inactive Pr form (red light absorbing) that [...]


1.The phytochromes, a family of red/far-red absorbing photoreceptors
Fankhauser C
J Biol Chem. 2001 Apr 13; 276(15): 11453-6. Epub 2001 Feb 16. Review. No abstract available
2.CONSTANS mediates between the circadian clock and the control of flowering in Arabidopsis
Suarez-Lopez P, Wheatley K, Robson F, Onouchi H, Valverde F, Coupland G
Nature. 2001 Apr 26; 410(6832): 1116-20
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