Plant Blue-Light Receptors

Trends Plant Sci. 2000 Aug;5(8):337-42. doi: 10.1016/s1360-1385(00)01687-3.


Plants have several blue-light receptors, which regulate different aspects of growth and development. Recent studies have identified three such receptors: cryptochrome 1, cryptochrome 2 and phototropin. Cryptochromes 1 and 2 are photolyase-like receptors that regulate hypocotyl growth and flowering time; phototropin mediates phototropism in response to blue light. In addition, phytochrome A has also been found to mediate various blue-light responses. Although the signal-transduction mechanisms of blue-light receptors remain largely unclear, phototropin is probably a protein kinase that regulates cytoplasmic calcium concentrations, whereas the cryptochromes might regulate anion-channel activity and changes in gene expression.

Publication types

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

MeSH terms

  • Arabidopsis / metabolism
  • Arabidopsis Proteins
  • Cryptochromes
  • Drosophila Proteins*
  • Eye Proteins*
  • Flavoproteins / metabolism*
  • Light*
  • Photoreceptor Cells, Invertebrate*
  • Plants / metabolism*
  • Receptors, G-Protein-Coupled
  • Signal Transduction


  • Arabidopsis Proteins
  • CRY1 protein, Arabidopsis
  • Cryptochromes
  • Drosophila Proteins
  • Eye Proteins
  • Flavoproteins
  • Receptors, G-Protein-Coupled
  • cry protein, Drosophila