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Are solar UV-B- and UV-A-dependent gene expression and metabolite accumulation in Arabidopsis mediated by the stress response regulator RADICAL-INDUCED CELL DEATH1?
Division of Plant Biology, Department of Biosciences, University of Helsinki, Helsinki, Finland; School of Chemical Technology, Department of Forest Products Technology, Aalto University, Espo, Finland .ORCID-id: 0000-0002-9233-7254
Division of Plant Biology, Department of Biosciences, University of Helsinki, Helsinki, Finland; Institute of Technology, University of Tartu, Tartu, Estonia .
Division of Plant Biology, Department of Biosciences, University of Helsinki, Helsinki, Finland .
Metabolomics Unit, Department of Biosciences, University of Helsinki, Helsinki, Finland .
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2015 (Engelska)Ingår i: Plant, Cell and Environment, ISSN 0140-7791, E-ISSN 1365-3040, Vol. 38, nr 5, s. 878-891Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Wavelengths in the ultraviolet (UV) region of the solar spectrum, UV-B (280-315nm) and UV-A (315-400nm), are key environmental signals modifying several aspects of plant physiology. Despite significant advances in the understanding of plant responses to UV-B and the identification of signalling components involved, there is limited information on the molecular mechanisms that control UV-B signalling in plants under natural sunlight. Here, we aimed to corroborate the previous suggested role for RADICAL-INDUCED CELL DEATH1 (RCD1) in UV-B signalling under full spectrum sunlight. Wild-type Arabidopsis thaliana and the rcd1-1 mutant were used in an experimental design outdoors where UV-B and UV-A irradiances were manipulated using plastic films, and gene expression, PYRIDOXINE BIOSYNTHESIS1 (PDX1) accumulation and metabolite profiles were analysed in the leaves. At the level of transcription, RCD1 was not directly involved in the solar UV-B regulation of genes with functions in UV acclimation, hormone signalling and stress-related markers. Furthermore, RCD1 had no role on PDX1 accumulation but modulated the UV-B induction of flavonoid accumulation in leaves of Arabidopsis exposed to solar UV. We conclude that RCD1 does not play an active role in UV-B signalling but rather modulates UV-B responses under full spectrum sunlight.

Ort, förlag, år, upplaga, sidor
2015. Vol. 38, nr 5, s. 878-891
Nyckelord [en]
Flavonoids; RCD1; Signalling; Solar UV; Stress; UV acclimation
Nationell ämneskategori
Botanik Biokemi och molekylärbiologi
Forskningsämne
Biokemi
Identifikatorer
URN: urn:nbn:se:oru:diva-34535DOI: 10.1111/pce.12341ISI: 000353898400004PubMedID: 24689869Scopus ID: 2-s2.0-84927723426OAI: oai:DiVA.org:oru-34535DiVA, id: diva2:709252
Anmärkning

Funding Agencies:

Academy of Finland 116775 135751 140981

Finnish Cultural Foundation

LignoCell - TEKES

LignoCell - Academy of Finland

Tillgänglig från: 2014-04-01 Skapad: 2014-04-01 Senast uppdaterad: 2019-03-26Bibliografiskt granskad

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Morales, Luis OrlandoStrid, Åke

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Morales, Luis OrlandoStrid, Åke
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Plant, Cell and Environment
BotanikBiokemi och molekylärbiologi

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