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Two separate UV-B radiation wavelength regions control expression of different molecular markers in Arabidopsis thaliana
Örebro University, Department of Natural Sciences.
Örebro University, Department of Natural Sciences.
Örebro University, Department of Natural Sciences.
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2008 (English)In: Functional Plant Biology, ISSN 1445-4408, E-ISSN 1445-4416, Vol. 35, no 3, p. 222-227Article in journal (Refereed) Published
Abstract [en]

Fluence-response curves were obtained at nine wavelengths in the interval 280-360 nm for mRNA transcripts of four molecular markers induced by ultraviolet-B (UV-B) radiation in Arabidopsis thaliana: CHS (encoding chalcone synthase), PDX1.3 (encoding an enzyme involved in formation of pyridoxine), MEB5.2 (encoding a protein with unknown function but which is strongly up-regulated by UV-B), and LHCB1*3 (encoding a chlorophyll a/b binding protein). Intact Arabidopsis plants were irradiated for 3h using a high intensity deuterium radiation source and narrow bandwith filters (Kalbin et al. 2005, J. Biochem. Biophys. Meth. 65, 1-12) without supplementary PAR. The results obtained suggest the existence of two distinct UV-B signal responses: one sensitive between 300 and 310 nm and the other sensitive around 280-290 nm. Among the investigated molecular markers, CHS and PDX1.3 were regulated through the chromophore absorbing around 300 nm, whereas MEB5.2 and LHCB1*3 were regulated through the chromophore absorbing at 280-290 nm. The results obtained show that at least two signal transduction pathways exist that regulate gene expression as a result of absorption of UV-B radiation in plants.

Place, publisher, year, edition, pages
Collinwood VIC: CSIRO , 2008. Vol. 35, no 3, p. 222-227
National Category
Biochemistry and Molecular Biology Natural Sciences Chemical Sciences
Research subject
Biochemistry
Identifiers
URN: urn:nbn:se:oru:diva-4629DOI: 10.1071/FP07197OAI: oai:DiVA.org:oru-4629DiVA, id: diva2:138928
Available from: 2008-10-14 Created: 2008-10-14 Last updated: 2017-12-14Bibliographically approved

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Kalbina, IrinaLi, ShaoshanKalbin, GeorgiStrid, Åke

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