Blue light responses

Hartmann U, Valentine WJ, Christie JM, Hays J, Jenkins GI, Weisshaar B. 1998. Identification of UV/blue light response elements in the Arabidopsis thaliana chalcone synthase promoter using a homologous protoplast transient expression system. Plant Mol Biol 36 741-754. 

Quinones MA, Lu Z and Zeiger E (1996) Close correspondence between the action spectra for the blue light responses of the guard cell and coleoptile chloroplasts, and the spectra for blue hght-dependent stomatal opening and coleoptile phototropism. Proc Natl Acad Sci USA 93 2224-2228... 

In recent years, a wealth of information on photolyase-mediated DNA repair and cryptochrome- and phototropin-mediated blue-light responses was obtained through the combined efforts of biologists, chemists, and physicists, from both experimental and theoretical studies. Here we have chosen recent examples of experimental work from our group to demonstrate the potential of modem EPR methods to answer mechanism-related questions and to study reactive intermediates in photo-induced electron transfer. Nevertheless, some key questions of these reactions remain to be solved. Important questions are as follows. What are the precise differences between CPD photolyase and (6 ) photolyase regarding... 

This brief chapter on action spectroscopy has given some practical methodology for obtaining action spectra from fluence-response data. Special mention was made of applications in the field of blue-Hght effects, in which action spectroscopy remains particularly active, mainly because, in most organisms with blue-light response, the responsible pigments remain to be isolated and identified. 

Galland, R, Action spectroscopy, in Blue Light Responses Phenomena and Occurrence in Plants and Microorganisms, Senger, H., CRC Press, Boca Raton, FL, 1987, p. 37. 

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