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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Jenkins, Gareth I. Hayes, Scott Velanis, Christos N. Franklin, Keara A. |
| Description | Author Affiliation: Hayes S ( School of Biological Sciences, University of Bristol, Bristol BS8 1UG, United Kingdom and.); Velanis CN ( Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom.); Jenkins GI ( Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom.); Franklin KA ( School of Biological Sciences, University of Bristol, Bristol BS8 1UG, United Kingdom and kerry.franklin@bristol.ac.uk.); |
| Abstract | Plants detect different facets of their radiation environment via specific photoreceptors to modulate growth and development. UV-B is perceived by the photoreceptor UV RESISTANCE LOCUS 8 (UVR8). The molecular mechanisms linking UVR8 activation to plant growth are not fully understood, however. When grown in close proximity to neighboring vegetation, shade-intolerant plants initiate dramatic stem elongation to overtop competitors. Here we show that UV-B, detected by UVR8, provides an unambiguous sunlight signal that inhibits shade avoidance responses in Arabidopsis thaliana by antagonizing the phytohormones auxin and gibberellin. UV-B triggers degradation of the transcription factors PHYTOCHROME INTERACTING FACTOR 4 and PHYTOCHROME INTERACTING FACTOR 5 and stabilizes growth-repressing DELLA proteins, inhibiting auxin biosynthesis via a dual mechanism. Our findings show that UVR8 signaling is closely integrated with other photoreceptor pathways to regulate auxin signaling and plant growth in sunlight. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 32 |
| Volume Number | 111 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2014-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Arabidopsis Proteins Metabolism Radiation Effects Arabidopsis Chromosomal Proteins, Non-Histone Indoleacetic Acids Photoreceptors, Plant Genetics Basic Helix-Loop-Helix Transcription Factors Basic-Leucine Zipper Transcription Factors Carrier Proteins Genes, Plant Gibberellins Antagonists & Inhibitors Models, Biological Mutation Nuclear Proteins Plants, Genetically Modified Protein Stability Proteolysis Signal Transduction Ultraviolet Rays Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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