Perception of solar UV radiation by plants : photoreceptors and mechanisms

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dc.contributor.author Rai, Neha
dc.contributor.author Morales, Luis Orlando
dc.contributor.author Aphalo, Pedro Jose
dc.date.accessioned 2021-08-17T05:39:01Z
dc.date.available 2021-08-17T05:39:01Z
dc.date.issued 2021-07
dc.identifier.citation Rai , N , Morales , L O & Aphalo , P J 2021 , ' Perception of solar UV radiation by plants : photoreceptors and mechanisms ' , Plant Physiology , vol. 186 , pp. 1382-1396 . https://doi.org/10.1093/plphys/kiab162
dc.identifier.other PURE: 167651810
dc.identifier.other PURE UUID: 7af77f31-168e-4cba-933e-48dfb1722e83
dc.identifier.other WOS: 000674744100011
dc.identifier.other ORCID: /0000-0002-4972-9332/work/98610653
dc.identifier.uri http://hdl.handle.net/10138/333224
dc.description.abstract About 95% of the ultraviolet (UV) photons reaching the Earth's surface are UV-A (315-400 nm) photons. Plant responses to UV-A radiation have been less frequently studied than those to UV-B (280-315 nm) radiation. Most previous studies on UV-A radiation have used an unrealistic balance between UV-A, UV-B, and photosynthetically active radiation (PAR). Consequently, results from these studies are difficult to interpret from an ecological perspective, leaving an important gap in our understanding of the perception of solar UV radiation by plants. Previously, it was assumed UV-A/blue photoreceptors, cryptochromes and phototropins mediated photomorphogenic responses to UV-A radiation and "UV-B photoreceptor" UV RESISTANCE LOCUS 8 (UVR8) to UV-B radiation. However, our understanding of how UV-A radiation is perceived by plants has recently improved. Experiments using a realistic balance between UV-B, UV-A, and PAR have demonstrated that UVR8 can play a major role in the perception of both UV-B and short-wavelength UV-A (UV-A(sw), 315 to similar to 350 nm) radiation. These experiments also showed that UVR8 and cryptochromes jointly regulate gene expression through interactions that alter the relative sensitivity to UV-B, UV-A, and blue wavelengths. Negative feedback loops on the action of these photoreceptors can arise from gene expression, signaling crosstalk, and absorption of UV photons by phenolic metabolites. These interactions explain why exposure to blue light modulates photomorphogenic responses to UV-B and UV-A(sw) radiation. Future studies will need to distinguish between short and long wavelengths of UV-A radiation and to consider UVR8's role as a UV-B/UV-A(sw) photoreceptor in sunlight. en
dc.format.extent 15
dc.language.iso eng
dc.relation.ispartof Plant Physiology
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject PHOTOSYNTHETICALLY ACTIVE RADIATION
dc.subject B-INDUCED PHOTOMORPHOGENESIS
dc.subject BLUE-LIGHT PHOTORECEPTORS
dc.subject GENE-EXPRESSION
dc.subject METABOLITE ACCUMULATION
dc.subject SIGNAL-TRANSDUCTION
dc.subject STRESS ACCLIMATION
dc.subject RESISTANCE LOCUS8
dc.subject LONG-TERM
dc.subject ARABIDOPSIS
dc.subject 11831 Plant biology
dc.title Perception of solar UV radiation by plants : photoreceptors and mechanisms en
dc.type Article
dc.contributor.organization Organismal and Evolutionary Biology Research Programme
dc.contributor.organization Plant Biology
dc.contributor.organization Viikki Plant Science Centre (ViPS)
dc.contributor.organization Sensory and Physiological Ecology of Plants (SenPEP)
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1093/plphys/kiab162
dc.relation.issn 0032-0889
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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