1. Neff, M. M., Fankhauser, C. & Chory, J. Light: an indicator of time and place. Genes Dev. 14, 257–271 ( 2000).
2. Ahmad, M. & Cashmore, A. R Seeing blue: The discovery of cryptochrome. Plant Mol. Biol. 30, 851– 861 (1996).
3. Christie, J. M. et al. Arabidopsis NPH1: A flavoprotein with the properties of a photoreceptor for phototropism. Science 282, 1698–1701 (1998).
4. Smith, H. Light quality, photoperception and plant strategy. Annu. Rev. Plant Physiol. 33, 481–518 ( 1982).
5. Ballare, C. L., Scope, A. L., Sanchez, R. A., Casal, J. J. & Ghersa, C. M. Early detection of neighbour plants by phytochrome perception of spectral changes in reflected sunlight. Plant Cell Env. 10, 551–557 (1987).