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Phytochromes and cryptochromes in the entrainment of the Arabidopsis circadian clock

Academic Article
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Overview

authors

  • Somers, D. E.
  • Devlin, P. F.
  • Kay, Steve A.

publication date

  • November 1998

journal

  • Science  Journal

abstract

  • Circadian clocks are synchronized by environmental cues such as light. Photoreceptor-deficient Arabidopsis thaliana mutants were used to measure the effect of light fluence rate on circadian period in plants. Phytochrome B is the primary high-intensity red light photoreceptor for circadian control, and phytochrome A acts under low-intensity red light. Cryptochrome 1 and phytochrome A both act to transmit low-fluence blue light to the clock. Cryptochrome 1 mediates high-intensity blue light signals for period length control. The presence of cryptochromes in both plants and animals suggests that circadian input pathways have been conserved throughout evolution.

subject areas

  • Arabidopsis
  • Arabidopsis Proteins
  • Biological Clocks
  • Circadian Rhythm
  • Cryptochromes
  • Drosophila Proteins
  • Eye Proteins
  • Flavoproteins
  • Light
  • Mutation
  • Photoreceptor Cells
  • Photoreceptor Cells, Invertebrate
  • Phytochrome
  • Phytochrome A
  • Phytochrome B
  • Plants, Genetically Modified
  • Receptors, G-Protein-Coupled
  • Signal Transduction
  • Transcription Factors
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Identity

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.282.5393.1488

PubMed ID

  • 9822379
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Additional Document Info

start page

  • 1488

end page

  • 1490

volume

  • 282

issue

  • 5393

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