Let there be light in the nucleus!

Curr Opin Plant Biol. 2006 Oct;9(5):509-14. doi: 10.1016/j.pbi.2006.07.013.


Ambient light conditions trigger both developmental transitions, such as the induction of flowering, and a suite of adaptive responses, exemplified by the shade-avoidance syndrome. These responses are initiated by three families of photoreceptors that are conserved in all higher plants: the phototropins, cryptochromes and phytochromes (phyA--phyE, cry1--cry3, phot1 and phot2 in Arabidopsis). Molecular genetic studies performed mainly in Arabidopsis indicate that photon capture by these light sensors usually initiates rapid changes in the gene expression profile, leading to plant adaptation to their environment. Interestingly, numerous transcription factors are early targets of light regulation, both at the transcriptional and post-transcriptional levels.

Publication types

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

MeSH terms

  • Arabidopsis / growth & development
  • Arabidopsis / radiation effects*
  • Cell Nucleus / physiology*
  • Gene Expression Profiling
  • Gene Expression Regulation, Plant / radiation effects
  • Light*
  • Oligonucleotide Array Sequence Analysis
  • Phototropism / physiology
  • Phytochrome / metabolism
  • Seedlings / growth & development
  • Seedlings / radiation effects*


  • Phytochrome