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Trends Plant Sci. 2000 Aug;5(8):337-42.

Plant blue-light receptors.

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Dept of Molecular, Cell and Developmental Biology, University of California, Los Angeles, 621 C. Young Dr. South, Los Angeles, CA 90095-1606, USA.


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.

[Indexed for MEDLINE]

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