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Molecular events following perception of ultraviolet-B radiation by plants
Örebro universitet, Institutionen för naturvetenskap. (Molekylär biokemi)ORCID-id: 0000-0003-3315-8835
2003 (engelsk)Inngår i: Physiologia Plantarum: An International Journal for Plant Biology, ISSN 0031-9317, E-ISSN 1399-3054, Vol. 117, nr 1, s. 1-10Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Exposure of plants to UV-B radiation (280–320 nm) results in changes in expression of a large number of genes. Before UV-B radiation or light of other wavelengths can give rise to a cellular response, it has to be perceived by some kind of receptor, and the information transduced via a signalling pathway to the target molecules, be it proteins in the cytoplasm

or the genetic material in the nucleus. The perception of low levels of UV-B probably occurs via a UV-B photoreceptor followed by several different signalling pathways. These pathways include second messengers such as calcium, kinases and the catalytic formation of reactive oxygen species. High levels of UV-B, on the other hand, probably cause cellular damage

and oxidative stress, thus activating a general stress signal transduction pathway which leads to a response similar to that which occurs after pathogen attack and other stresses. Some of the genes identified so far as being regulated by UV-B encode proteins involved in the biosynthesis of protective pigments, DNA repair and antioxidative enzymes, photosynthetic genes, cell cycle genes, and stress genes induced by other types of stimuli (i.e. pathogenesis-related proteins and senescence-induced genes). In the light of the information obtained on components necessary for UV-B-induced changes in gene expression, we propose in this mini-review a working model for UV-B perception and signal transduction. This model also takes into account dosage differences for the observations, which imply a separation into UV-B-specific and more general stress signal transduction.

sted, utgiver, år, opplag, sider
2003. Vol. 117, nr 1, s. 1-10
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Biokemi
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URN: urn:nbn:se:oru:diva-4143DOI: 10.1034/j.1399-3054.2003.1170101.xOAI: oai:DiVA.org:oru-4143DiVA, id: diva2:138442
Tilgjengelig fra: 2007-11-06 Laget: 2007-11-06 Sist oppdatert: 2017-12-14bibliografisk kontrollert

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