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Open Access Gold möglich sobald Verlagsversion bei der ZB eingereicht worden ist.
Interaction of COP1 and UVR8 regulates UV-B-induced photomorphogenesis and stress acclimation in Arabidopsis.
EMBO J. 28, 591-601 (2009)
The ultraviolet-B (UV-B) portion of the solar radiation functions as an environmental signal for which plants have evolved specific and sensitive UV-B perception systems. The UV-B-specific UV RESPONSE LOCUS 8 (UVR8) and the multifunctional E3 ubiquitin ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) are key regulators of the UV-B response. We show here that uvr8-null mutants are deficient in UV-B-induced photomorphogenesis and hypersensitive to UV-B stress, whereas overexpression of UVR8 results in enhanced UV-B photomorphogenesis, acclimation and tolerance to UV-B stress. By using sun simulators, we provide evidence at the physiological level that UV-B acclimation mediated by the UV-B-specific photoregulatory pathway is indeed required for survival in sunlight. At the molecular level, we demonstrate that the wild type but not themutant UVR8 and COP1 proteins directly interact in a UVB-dependent, rapid manner in planta. These data collectively suggest that UV-B-specific interaction of COP1 and UVR8 in the nucleus is a very early step in signalling and responsible for the plant's coordinated response to UV-B ensuring UV-B acclimation and protection in the natural environment.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Arabidopsis; photomorphogenesis; plant environment interaction; stress acclimation; UV-B; bimolecular fluorescence complementation; signaling component uvr8; protein interactions; c-jun; light; hy5; transcription; plants; transduction; radiation
ISSN (print) / ISBN
0261-4189
e-ISSN
1460-2075
Zeitschrift
EMBO Journal, The
Quellenangaben
Band: 28,
Heft: 5,
Seiten: 591-601
Verlag
Wiley
Verlagsort
Heidelberg, Germany
Begutachtungsstatus
Peer reviewed
Institut(e)
Research Unit Environmental Simulation (EUS)