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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Danon, Antoine Coll, Núria Sánchez Apel, Klaus |
| Description | Author Affiliation: Danon A ( Institute of Plant Sciences, Plant Genetics, Swiss Federal Institute of Technology, CH-8092 Zürich, Switzerland.); |
| Abstract | Programmed cell death (PCD) plays an important role during the life cycle of higher organisms. Although several regulatory mechanisms governing PCD are thought to be conserved in animals and plants, light-dependent cell death represents a form of PCD that is unique to plants. The light requirement of PCD has often been associated with the production of reactive oxygen species during photosynthesis. In support of this hypothesis, hydrogen peroxide and superoxide have been shown to be involved in triggering a PCD response. In the present work, we have used the conditional flu mutant of Arabidopsis to analyze the impact of another reactive oxygen species, singlet oxygen, on cell death. Unexpectedly, the light-dependent release of singlet oxygen alone is not sufficient to induce PCD of flu seedlings but has to act together with a second concurrent blue light reaction. This blue-light-specific trigger of PCD could not be attributed to a photosynthetic reaction or redox change within the chloroplast but to the activation of the blue light/UVA-specific photoreceptor cryptochrome. The singlet oxygen-mediated and cryptochrome-dependent cell death response differs in several ways from PCD triggered by hydrogen peroxide/superoxide. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 45 |
| Volume Number | 103 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2006-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Apoptosis Physiology Arabidopsis Proteins Metabolism Arabidopsis Cytology Flavoproteins Singlet Oxygen Radiation Effects Genetics Cryptochromes DNA, Plant Genes, Plant Mutation Photobiology Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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