Phytochrome-mediated light signalling in Arabidopsis

Curr Opin Plant Biol. 2004 Oct;7(5):564-9. doi: 10.1016/j.pbi.2004.07.004.


The phytochrome photoreceptors regulate all major transitions during the life cycle of plants. The role of each member of the phytochrome family in Arabidopsis is starting to be understood, and a molecular description of phytochrome-regulated flowering time and shade avoidance is emerging. Recent publications have challenged some areas of well-accepted models concerning phytochrome signalling. Moreover, the importance of proteolysis during phytochrome signalling is becoming very apparent.

Publication types

  • Review

MeSH terms

  • Arabidopsis / metabolism*
  • Arabidopsis Proteins
  • Down-Regulation
  • Flowers / growth & development
  • Flowers / metabolism
  • Gene Expression Regulation, Plant
  • Light*
  • Photoreceptor Cells / metabolism*
  • Phytochrome / metabolism*
  • Phytochrome A
  • Phytochrome B
  • Signal Transduction*
  • Time Factors
  • Transcription Factors / metabolism*


  • Arabidopsis Proteins
  • PHYA protein, Arabidopsis
  • PHYB protein, Arabidopsis
  • Phytochrome A
  • Transcription Factors
  • Phytochrome
  • Phytochrome B