NDLI: UV-B Perceived by the UVR8 Photoreceptor Inhibits Plant Thermomorphogenesis

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UV-B Perceived by the UVR8 Photoreceptor Inhibits Plant Thermomorphogenesis

Content Provider	Semantic Scholar
Author	Hayes, Scott Sharma, Ashutosh Fraser, Donald P. Trevisan, Martine Cragg-Barber, C. Kester Tavridou, Eleni Fankhauser, Christian Jenkins, Gareth I. Franklin, Keara A.
Copyright Year	2017
Abstract	Small increases in ambient temperature can elicit striking effects on plant architecture, collectively termed thermomorphogenesis [1]. In Arabidopsis thaliana, these include marked stem elongation and leaf elevation, responses that have been predicted to enhance leaf cooling [2-5]. Thermomorphogenesis requires increased auxin biosynthesis, mediated by the bHLH transcription factor PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) [6-8], and enhanced stability of the auxin co-receptor TIR1, involving HEAT SHOCK PROTEIN 90 (HSP90) [9]. High-temperature-mediated hypocotyl elongation additionally involves localized changes in auxin metabolism, mediated by the indole-3-acetic acid (IAA)-amido synthetase Gretchen Hagen 3 (GH3).17 [10]. Here we show that ultraviolet-B light (UV-B) perceived by the photoreceptor UV RESISTANCE LOCUS 8 (UVR8) [11] strongly attenuates thermomorphogenesis via multiple mechanisms inhibiting PIF4 activity. Suppression of thermomorphogenesis involves UVR8 and CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1)-mediated repression of PIF4 transcript accumulation, reducing PIF4 abundance. UV-B also stabilizes the bHLH protein LONG HYPOCOTYL IN FAR RED (HFR1), which can bind to and inhibit PIF4 function. Collectively, our results demonstrate complex crosstalk between UV-B and high-temperature signaling. As plants grown in sunlight would most likely experience concomitant elevations in UV-B and ambient temperature, elucidating how these pathways are integrated is of key importance to the understanding of plant development in natural environments.
Starting Page	120
Ending Page	127
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1016/j.cub.2016.11.004
Alternate Webpage(s)	https://www.ris.uu.nl/ws/files/26710033/Hayes_et_al_2017_Curr_Biol.pdf
Alternate Webpage(s)	http://eprints.gla.ac.uk/133366/1/133366.pdf
Alternate Webpage(s)	https://research-information.bristol.ac.uk/files/95968380/mmc2.pdf
Alternate Webpage(s)	https://research-information.bris.ac.uk/files/95968380/mmc2.pdf
Alternate Webpage(s)	https://api.elsevier.com/content/article/pii/S096098221631329X
Alternate Webpage(s)	https://www.sciencedirect.com/science/article/pii/S096098221631329X
PubMed reference number	27989670
Alternate Webpage(s)	https://doi.org/10.1016/j.cub.2016.11.004
Journal	Medline
Volume Number	27
Journal	Current Biology
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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Title : UV-B Perceived by the UVR 8 Photoreceptor Inhibits Plant Thermomorphogenesis

Revisiting chromatin binding of the Arabidopsis UV-B photoreceptor UVR8

UV-B detected by the UVR8 photoreceptor antagonizes auxin signaling and plant shade avoidance.

Cysteines have a role in conformation of the UVR8 photoreceptor.

A Comprehensive Phylogeny Reveals Functional Conservation of the UV-B Photoreceptor UVR8 from Green Algae to Higher Plants

The UV-B photoreceptor UVR8 promotes photosynthetic efficiency in Arabidopsis thaliana exposed to elevated levels of UV-B

UV-B detected by the UVR8 photoreceptor antagonizes auxin signaling and plant shade avoidance

Flashes of UV-C light are perceived by UVR8, the photoreceptor of UV-B light

Arabidopsis B-box transcription factors BBX20-22 promote UVR8 photoreceptor-mediated UV-B responses.

UV-B Perceived by the UVR8 Photoreceptor Inhibits Plant Thermomorphogenesis

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Title : UV-B Perceived by the UVR 8 Photoreceptor Inhibits Plant Thermomorphogenesis

Revisiting chromatin binding of the Arabidopsis UV-B photoreceptor UVR8

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UV-B Perceived by the UVR8 Photoreceptor Inhibits Plant Thermomorphogenesis