Nucleo-cytoplasmic partitioning of the plant photoreceptors phytochromes

Semin Cell Dev Biol. 2000 Dec;11(6):505-10. doi: 10.1006/scdb.2000.0202.


Phytochromes in harmony with blue light photoreceptors play a major role in controlling plant growth and development from germination to seed maturation. Light absorption by phytochromes triggers a signaling cascade, phototransduction, which culminates in regulated gene expression. A major regulatory step at the cellular level, which affects specificities of light-induced physiological responses, seems to be the light-quality and light-quantity dependent nuclear import of the phytochromes themselves. The correlations found between the nuclear import of phytochromes (phyA and phyB) and various physiological responses regulated by these photoreceptors provides strong support for this hypothesis.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Active Transport, Cell Nucleus
  • Cell Nucleus / metabolism*
  • Cytoplasm / metabolism*
  • Darkness
  • Light
  • Photoreceptor Cells*
  • Phytochrome / metabolism*
  • Phytochrome A
  • Phytochrome B
  • Plant Cells
  • Plants / enzymology
  • Plants / metabolism*
  • Protein Kinases / metabolism
  • Signal Transduction
  • Transcription Factors*


  • Phytochrome A
  • Transcription Factors
  • Phytochrome
  • Phytochrome B
  • Protein Kinases