UV-B exposure, ROS, and stress: inseparable companions or loosely linked associates?
2013 (English)In: Trends in Plant Science, ISSN 1360-1385, Vol. 18, no 2, 107-115 p.Article in journal (Refereed) Published
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.
UV-B; stress, ROS, antioxidant, acclimation, signaling
Botany Biochemistry and Molecular Biology
Research subject Biochemistry
IdentifiersURN: urn:nbn:se:oru:diva-28491DOI: 10.1016/j.tplants.2012.09.003ISI: 000315426500007ScopusID: 2-s2.0-84873104912OAI: oai:DiVA.org:oru-28491DiVA: diva2:613422
ProjectsUV-B-fotobiologi: mekanismer för perception och cellulära responser
Funding agencies are:
COST Action FA0906
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 2013-03-272013-03-272016-08-10Bibliographically approved