Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Subscribe

Logo for

PLANT CELL 18 (8): 1975-1990

Copyright © 2006 by the American Society of Plant Physiologists.

CONSTITUTIVELY PHOTOMORPHOGENIC1 Is Required for the UV-B Response in Arabidopsis[W]

Attila Oravecza,b,1, Alexander Baumanna,1, Zoltán Mátéb, Agnieszka Brzezinskaa, Jean Molinierc, Edward J. Oakeleyc, Éva Ádámd, Eberhard Schäfera, Ferenc Nagyb,d, and Roman Ulma,2

a Institute of Biology II/Botany, University of Freiburg, D-79104 Freiburg, Germany
b Institute of Plant Biology, Agricultural Biotechnological Center, Szent-Györgyi A 4, H-2101 Gödöllo, Hungary
c Friedrich Miescher Institute for Biomedical Research, CH-4058 Basel, Switzerland
d Institute of Plant Biology, Biological Research Center, H-6726 Szeged, Hungary

2 To whom correspondence should be addressed. E-mail roman.ulm{at}biologie.uni-freiburg.de; fax 49-761-203-2612.

Abstract: CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1) is a negative regulator of photomorphogenesis in Arabidopsis thaliana. COP1 functions as an E3 ubiquitin ligase, targeting select proteins for proteasomal degradation in plants as well as in mammals. Among its substrates is the basic domain/leucine zipper (bZIP) transcription factor ELONGATED HYPOCOTYL5 (HY5), one of the key regulators of photomorphogenesis under all light qualities, including UV-B responses required for tolerance to this environmental threat. Here, we report that, in contrast with the situation in visible light, COP1 is a critical positive regulator of responses to low levels of UV-B. We show that in the cop1-4 mutant, flavonoid accumulation and genome-wide expression changes in response to UV-B are blocked to a large extent. COP1 is required for HY5 gene activation, and both COP1 and HY5 proteins accumulate in the nucleus under supplementary UV-B. SUPPRESSOR OF PHYTOCHROME A-105 family proteins (SPA1 to SPA4) that are required for COP1 function in dark and visible light are not essential in the response to UV-B. We conclude that COP1 performs a specific and novel role in the plants' photomorphogenic response to UV-B, coordinating HY5-dependent and -independent pathways, which eventually results in UV-B tolerance.

THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Multiple Roles for UV RESISTANCE LOCUS8 in Regulating Gene Expression and Metabolite Accumulation in Arabidopsis under Solar Ultraviolet Radiation.
L. O. Morales, M. Brosche, J. Vainonen, G. I. Jenkins, J. J. Wargent, N. Sipari, A. Strid, A. V. Lindfors, R. Tegelberg, and P. J. Aphalo (2013)
Plant Physiology 161, 744-759
   Abstract »    Full Text »    PDF »
Reversion of the Arabidopsis UV-B photoreceptor UVR8 to the homodimeric ground state.
M. Heijde and R. Ulm (2013)
PNAS 110, 1113-1118
   Abstract »    Full Text »    PDF »
Rapid Reversion from Monomer to Dimer Regenerates the Ultraviolet-B Photoreceptor UV RESISTANCE LOCUS8 in Intact Arabidopsis Plants.
M. Heilmann and G. I. Jenkins (2013)
Plant Physiology 161, 547-555
   Abstract »    Full Text »    PDF »
Arabidopsis FHY3 and HY5 Positively Mediate Induction of COP1 Transcription in Response to Photomorphogenic UV-B Light.
X. Huang, X. Ouyang, P. Yang, O. S. Lau, G. Li, J. Li, H. Chen, and X. W. Deng (2012)
PLANT CELL 24, 4590-4606
   Abstract »    Full Text »    PDF »
C-terminal region of the UV-B photoreceptor UVR8 initiates signaling through interaction with the COP1 protein.
C. Cloix, E. Kaiserli, M. Heilmann, K. J. Baxter, B. A. Brown, A. O'Hara, B. O. Smith, J. M. Christie, and G. I. Jenkins (2012)
PNAS 109, 16366-16370
   Abstract »    Full Text »    PDF »
In Vivo Function of Tryptophans in the Arabidopsis UV-B Photoreceptor UVR8.
A. O'Hara and G. I. Jenkins (2012)
PLANT CELL 24, 3755-3766
   Abstract »    Full Text »    PDF »
The COP9 Signalosome: Its Regulation of Cullin-Based E3 Ubiquitin Ligases and Role in Photomorphogenesis.
C. D. Nezames and X. W. Deng (2012)
Plant Physiology 160, 38-46
   Full Text »    PDF »
Canopy Light and Plant Health.
C. L. Ballare, C. A. Mazza, A. T. Austin, and R. Pierik (2012)
Plant Physiology 160, 145-155
   Full Text »    PDF »
Mutation of Arabidopsis HY1 causes UV-C hypersensitivity by impairing carotenoid and flavonoid biosynthesis and the down-regulation of antioxidant defence.
Y. Xie, D. Xu, W. Cui, and W. Shen (2012)
J. Exp. Bot. 63, 3869-3883
   Abstract »    Full Text »    PDF »
UVR8 Mediates UV-B-Induced Arabidopsis Defense Responses against Botrytis cinerea by Controlling Sinapate Accumulation.
P. V. Demkura and C. L. Ballare (2012)
Mol Plant 5, 642-652
   Abstract »    Full Text »    PDF »
Plant UVR8 Photoreceptor Senses UV-B by Tryptophan-Mediated Disruption of Cross-Dimer Salt Bridges.
J. M. Christie, A. S. Arvai, K. J. Baxter, M. Heilmann, A. J. Pratt, A. O'Hara, S. M. Kelly, M. Hothorn, B. O. Smith, K. Hitomi, et al. (2012)
Science 335, 1492-1496
   Abstract »    Full Text »    PDF »
Regulation of Root Greening by Light and Auxin/Cytokinin Signaling in Arabidopsis.
K. Kobayashi, S. Baba, T. Obayashi, M. Sato, K. Toyooka, M. Keranen, E.-M. Aro, H. Fukaki, H. Ohta, K. Sugimoto, et al. (2012)
PLANT CELL 24, 1081-1095
   Abstract »    Full Text »    PDF »
Integration of low temperature and light signaling during cold acclimation response in Arabidopsis.
R. Catala, J. Medina, and J. Salinas (2011)
PNAS 108, 16475-16480
   Abstract »    Full Text »    PDF »
The GreenCut2 Resource, a Phylogenomically Derived Inventory of Proteins Specific to the Plant Lineage.
S. J. Karpowicz, S. E. Prochnik, A. R. Grossman, and S. S. Merchant (2011)
J. Biol. Chem. 286, 21427-21439
   Abstract »    Full Text »    PDF »
Perception of UV-B by the Arabidopsis UVR8 Protein.
L. Rizzini, J.-J. Favory, C. Cloix, D. Faggionato, A. O'Hara, E. Kaiserli, R. Baumeister, E. Schafer, F. Nagy, G. I. Jenkins, et al. (2011)
Science 332, 103-106
   Abstract »    Full Text »    PDF »
Genome-Wide Analysis of Light-Dependent Transcript Accumulation Patterns during Early Stages of Arabidopsis Seedling Deetiolation.
F. Peschke and T. Kretsch (2011)
Plant Physiology 155, 1353-1366
   Abstract »    Full Text »    PDF »
EFO1 and EFO2, encoding putative WD-domain proteins, have overlapping and distinct roles in the regulation of vegetative development and flowering of Arabidopsis.
W. Wang, D. Yang, and K. A. Feldmann (2011)
J. Exp. Bot. 62, 1077-1088
   Abstract »    Full Text »    PDF »
Negative feedback regulation of UV-B-induced photomorphogenesis and stress acclimation in Arabidopsis.
H. Gruber, M. Heijde, W. Heller, A. Albert, H. K. Seidlitz, and R. Ulm (2010)
PNAS 107, 20132-20137
   Abstract »    Full Text »    PDF »
Plant L10 Ribosomal Proteins Have Different Roles during Development and Translation under Ultraviolet-B Stress.
M. L. F. Ferreyra, A. Pezza, J. Biarc, A. L. Burlingame, and P. Casati (2010)
Plant Physiology 153, 1878-1894
   Abstract »    Full Text »    PDF »
Arabidopsis Cockayne Syndrome A-Like Proteins 1A and 1B Form a Complex with CULLIN4 and Damage DNA Binding Protein 1A and Regulate the Response to UV Irradiation.
C. Zhang, H. Guo, J. Zhang, G. Guo, K. S. Schumaker, and Y. Guo (2010)
PLANT CELL 22, 2353-2369
   Abstract »    Full Text »    PDF »
The Molecular and Physiological Responses of Physcomitrella patens to Ultraviolet-B Radiation.
L. Wolf, L. Rizzini, R. Stracke, R. Ulm, and S. A. Rensing (2010)
Plant Physiology 153, 1123-1134
   Abstract »    Full Text »    PDF »
Karrikins enhance light responses during germination and seedling development in Arabidopsis thaliana.
D. C. Nelson, G. R. Flematti, J.-A. Riseborough, E. L. Ghisalberti, K. W. Dixon, and S. M. Smith (2010)
PNAS 107, 7095-7100
   Abstract »    Full Text »    PDF »
ROOT UV-B SENSITIVE2 Acts with ROOT UV-B SENSITIVE1 in a Root Ultraviolet B-Sensing Pathway.
C. D. Leasure, H. Tong, G. Yuen, X. Hou, X. Sun, and Z.-H. He (2009)
Plant Physiology 150, 1902-1915
   Abstract »    Full Text »    PDF »
Role of root UV-B sensing in Arabidopsis early seedling development.
H. Tong, C. D. Leasure, X. Hou, G. Yuen, W. Briggs, and Z.-H. He (2008)
PNAS 105, 21039-21044
   Abstract »    Full Text »    PDF »
Hormone- and light-regulated nucleocytoplasmic transport in plants: current status.
Y. Lee, H.-S. Lee, J.-S. Lee, S.-K. Kim, and S.-H. Kim (2008)
J. Exp. Bot. 59, 3229-3245
   Abstract »    Full Text »    PDF »
Biochemical Characterization of Arabidopsis Complexes Containing CONSTITUTIVELY PHOTOMORPHOGENIC1 and SUPPRESSOR OF PHYA Proteins in Light Control of Plant Development.
D. Zhu, A. Maier, J.-H. Lee, S. Laubinger, Y. Saijo, H. Wang, L.-J. Qu, U. Hoecker, and X. W. Deng (2008)
PLANT CELL 20, 2307-2323
   Abstract »    Full Text »    PDF »
UV-B Signaling Pathways with Different Fluence-Rate Response Profiles Are Distinguished in Mature Arabidopsis Leaf Tissue by Requirement for UVR8, HY5, and HYH.
B. A. Brown and G. I. Jenkins (2008)
Plant Physiology 146, 576-588
   Abstract »    Full Text »    PDF »
Interaction of the Arabidopsis UV-B-Specific Signaling Component UVR8 with Chromatin.
C. Cloix and G. I. Jenkins (2008)
Mol Plant 1, 118-128
   Abstract »    Full Text »    PDF »
UV-B Promotes Rapid Nuclear Translocation of the Arabidopsis UV-B Specific Signaling Component UVR8 and Activates Its Function in the Nucleus.
E. Kaiserli and G. I. Jenkins (2007)
PLANT CELL 19, 2662-2673
   Abstract »    Full Text »    PDF »
Genome-Wide Gene Expression Analysis Reveals a Critical Role for CRYPTOCHROME1 in the Response of Arabidopsis to High Irradiance.
T. Kleine, P. Kindgren, C. Benedict, L. Hendrickson, and A. Strand (2007)
Plant Physiology 144, 1391-1406
   Abstract »    Full Text »    PDF »
PlanTAPDB, a Phylogeny-Based Resource of Plant Transcription-Associated Proteins.
S. Richardt, D. Lang, R. Reski, W. Frank, and S. A. Rensing (2007)
Plant Physiology 143, 1452-1466
   Abstract »    Full Text »    PDF »

To Advertise     Find Products

Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882