Effects of temperature on UV-B-induced DNA damage and photorepair in Arabidopsis thaliana
Author
Summary, in English
DNA damage in the form of cyclobutane pyrimidine dimers(CPDs) and (6-4) photoproducts(6-4PPs) induced by UV-B radiation in Arabidopsis thaliana at different temperatures was investigated using ELISA with specific monoclonal antibodies. CPDs and 64PPs increased during 3 h UV-B exposure, but further exposure led to decreases. Contrary to the commonly accepted view that DNA damage induced by UV-B radiation is temperature-independent because of its photochemical nature, we found UV-B-induction of CPDs and 64PPs in Arabidopsis to be slower at a low than at a high temperature. Photorepair of CPDs at 24degreesC was much faster than that at 0degreesC and 12degreesC with 50% CPDs removal during 1 h exposure to white light. Photorepair of 6-4PPs at 12degreesC was very slow as compared with that at 24degreesC and almost no removal of 6-4PPs was detected after 4 h exposure to white light at 0degreesC. There was evidence to suggest that temperature-dependent DNA damage and photorepair could have important ecological implications.
Department/s
Publishing year
2004
Language
English
Pages
173-176
Publication/Series
Journal of Environmental Sciences(China)
Volume
16
Issue
1
Links
Document type
Journal article
Publisher
Science China Press
Topic
- Biological Sciences
Status
Published
Project
- Photobiology
Research group
- Photobiology
ISBN/ISSN/Other
- ISSN: 1001-0742