Journal of Plant Research

, Volume 129, Issue 2, pp 137–148 | Cite as

Signaling mechanisms of plant cryptochromes in Arabidopsis thaliana

  • Bobin Liu
  • Zhaohe Yang
  • Adam Gomez
  • Bin Liu
  • Chentao Lin
  • Yoshito Oka
JPR Symposium The Cutting Edge of Photoresponse Mechanisms: Photoreceptor and Signaling Mechanism


Cryptochromes (CRY) are flavoproteins that direct a diverse array of developmental processes in response to blue light in plants. Conformational changes in CRY are induced by the absorption of photons and result in the propagation of light signals to downstream components. In Arabidopsis, CRY1 and CRY2 serve both distinct and partially overlapping functions in regulating photomorphogenic responses and photoperiodic flowering. For example, both CRY1 and CRY2 regulate the abundance of transcription factors by directly reversing the activity of E3 ubiquitin ligase on CONSTITUTIVE PHOTOMORPHOGENIC 1 and SUPPRESSOR OF PHYA-105 1 complexes in a blue light-dependent manner. CRY2 also specifically governs a photoperiodic flowering mechanism by directly interacting with a transcription factor called CRYPTOCHROME-INTERACTING BASIC-HELIX-LOOP-HELIX. Recently, structure/function analysis of CRY1 revealed that the CONSTITUTIVE PHOTOMORPHOGENIC 1 independent pathway is also involved in CRY1-mediated inhibition of hypocotyl elongation. CRY1 and CRY2 thus not only share a common pathway but also relay light signals through distinct pathways, which may lead to altered developmental programs in plants.


Cryptochrome De-etiolation Flowering Photomorphogenesis Transcription 



This work was supported by the Program for New Century Excellent Talents in Fujian Province University and the School Special Development program of Fujian Agriculture and Forestry University (6112C035001).


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Copyright information

© The Botanical Society of Japan and Springer Japan 2016

Authors and Affiliations

  • Bobin Liu
    • 1
    • 2
  • Zhaohe Yang
    • 1
  • Adam Gomez
    • 3
  • Bin Liu
    • 4
  • Chentao Lin
    • 5
  • Yoshito Oka
    • 1
  1. 1.Basic Forestry and Proteomics Center, Haixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhouChina
  2. 2.College of ForestryFujian Agriculture and Forestry UniversityFuzhouChina
  3. 3.Molecular, Cellular and Integrative PhysiologyUniversity of CaliforniaLos AngelesUSA
  4. 4.Institute of Crop SciencesChinese Academy of Agriculture SciencesBeijingPeople’s Republic of China
  5. 5.Department of Molecular, Cell and Developmental BiologyUniversity of CaliforniaLos AngelesUSA

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