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UV-B exposure, ROS, and stress: inseparable companions or loosely linked associates?
Pécs University, Pécs, Hungary.
University College of Cork, Cork, Ireland.
Örebro University, School of Science and Technology. (Biokemi)ORCID iD: 0000-0003-3315-8835
2013 (English)In: Trends in Plant Science, ISSN 1360-1385, E-ISSN 1878-4372, Vol. 18, no 2, 107-115 p.Article in journal (Refereed) Published
Abstract [en]

Ultraviolet-B (UV-B) radiation has long been perceived as a stressor. However, a conceptual U-turn has taken place, and UV-B damage is now considered rare. We question whether UV-stress and UV-B-induced reactive oxygen species (ROS) are still relevant concepts, and if ROS-mediated signaling contributes to UV-B acclimation. Measurements of antioxidants and of antioxidant genes show that both low and high UV-B doses alter ROS metabolism. Yet, there is no evidence that ROS control gene expression under low UV-B. Instead, expression of antioxidant genes is linked to the UV RESISTANCE LOCUS 8 pathway. We hypothesize that low UVB doses cause ‘eustress’ (good stress) and that stimulispecific signaling pathways pre-dispose plants to a state of low alert that includes activation of antioxidant defenses.

Place, publisher, year, edition, pages
Cell Press , 2013. Vol. 18, no 2, 107-115 p.
Keyword [en]
UV-B; stress, ROS, antioxidant, acclimation, signaling
National Category
Botany Biochemistry and Molecular Biology
Research subject
Biochemistry
Identifiers
URN: urn:nbn:se:oru:diva-28491DOI: 10.1016/j.tplants.2012.09.003ISI: 000315426500007Scopus ID: 2-s2.0-84873104912OAI: oai:DiVA.org:oru-28491DiVA: diva2:613422
Projects
UV-B-fotobiologi: mekanismer för perception och cellulära responser
Note

Funding agencies are:

COST Action  FA0906

UV4Growth  

Faculty of Business, Science, and Technology at Örebro University  

Science Foundation Ireland (SFI)  11/RFP.1/EOB/3303 

Hungarian Scientific Research Fund  OTKA NN-85349 

Available from: 2013-03-27 Created: 2013-03-27 Last updated: 2017-12-06Bibliographically approved

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Publisher's full textScopushttp://www.cell.com/trends/plant-science/abstract/S1360-1385(12)00210-5

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