Kim, Yu Kwang .
Mechanisms of UV-B Perception in Arabidopsis thaliana.
UV-B can damage important macromolecules in living organisms. Therefore, plants have developed mechanisms to protect them from UV damage such as the increased accumulation of UV-B absorbing pigments (UVAPs) after UV-exposure. However, knowledge of how plants recognize UV-B light before triggering UV-responses is lacking. Two possible mechanisms of UV-B perception include the involvement of a specific UV-B photoreceptor and the detection of UV-induced DNA damage products. To distinguish between these two possibilities, I determined the action spectrum of UVAP induction by UV-B and found that there is a peak response at 285 nm supporting the involvement of a UV-B photoreceptor. In addition, using DNA repair mutants, I ruled out a possible involvement of DNA damage products on UV-B perception. Thus my work strongly supports UV perception via a photoreceptor.
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1 - California State University, Fullerton, Department of Biological Sciences, 800 N. State College Blvd., Fullerton, CA, 92831-3599, USA
Presentation Type: Plant Biology Abstract
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM