The photoreceptor UVR8 mediates the perception of both UV-B and UV-A wavelengths up to 350 nm of sunlight with responsivity moderated by cryptochromes

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Rai , N , O'Hara , A , Farkas , D , Safronov , O , Ratanasopa , K , Wang , F , Lindfors , A V , Jenkins , G I , Lehto , T , Salojärvi , J , Brosché , M , Strid , Å , Aphalo , P J & Morales , L O 2020 , ' The photoreceptor UVR8 mediates the perception of both UV-B and UV-A wavelengths up to 350 nm of sunlight with responsivity moderated by cryptochromes ' , Plant, Cell and Environment , vol. 43 , no. 6 , pp. 1513-1527 . https://doi.org/10.1111/pce.13752

Title: The photoreceptor UVR8 mediates the perception of both UV-B and UV-A wavelengths up to 350 nm of sunlight with responsivity moderated by cryptochromes
Author: Rai, Neha; O'Hara, Andrew; Farkas, Daniel; Safronov, Omid; Ratanasopa, Khuanpiroon; Wang, Fang; Lindfors, Anders V.; Jenkins, Gareth I.; Lehto, Tarja; Salojärvi, Jarkko; Brosché, Mikael; Strid, Åke; Aphalo, Pedro José; Morales, Luis Orlando
Contributor: University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Molecular and Integrative Biosciences Research Programme
University of Helsinki, Plant Biology
University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Plant Biology
Date: 2020-06
Language: eng
Number of pages: 15
Belongs to series: Plant, Cell and Environment
ISSN: 0140-7791
URI: http://hdl.handle.net/10138/317405
Abstract: ABSTRACT The photoreceptors UV RESISTANCE LOCUS 8 (UVR8) and CRYPTOCHROMES 1 and 2 (CRYs) play major roles in the perception of UV-B (280?315?nm) and UV-A/blue radiation (315?500?nm), respectively. However, it is poorly understood how they function in sunlight. The roles of UVR8 and CRYs were assessed in a factorial experiment with Arabidopsis thaliana wild-type and photoreceptor mutants exposed to sunlight for 6?h or 12?h under five types of filters with cut-offs in UV and blue-light regions. Transcriptome-wide responses triggered by UV-B and UV-A wavelengths shorter than 350?nm (UV-Asw) required UVR8 whereas those induced by blue and UV-A wavelengths longer than 350?nm (UV-Alw) required CRYs. UVR8 modulated gene expression in response to blue light while lack of CRYs drastically enhanced gene expression in response to UV-B and UV-Asw. These results agree with our estimates of photons absorbed by these photoreceptors in sunlight and with in vitro monomerization of UVR8 by wavelengths up to 335?nm. Motif enrichment analysis predicted complex signaling downstream of UVR8 and CRYs. Our results highlight that it is important to use UV waveband definitions specific to plants' photomorphogenesis as is routinely done in the visible region. This article is protected by copyright. All rights reserved.
Subject: 11831 Plant biology
Arabidopsis thaliana
blue light
cryptochrome
gene expression
photoreceptor interaction
solar radiation
ultraviolet radiation
UVR8
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