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UV-B exposure, ROS, and stress: inseparable companions or loosely linked associates?

Trends in plant science, 2013-02, Vol.18 (2), p.107 [Peer Reviewed Journal]

Copyright © 2012 Elsevier Ltd. All rights reserved. ;ISSN: 1878-4372 ;ISSN: 1360-1385 ;EISSN: 1878-4372 ;DOI: 10.1016/j.tplants.2012.09.003 ;PMID: 23084465

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Title:
UV-B exposure, ROS, and stress: inseparable companions or loosely linked associates?
Author: Hideg, Eva ; Jansen, Marcel A K ; Strid, Ake
Subjects: acclimation ; antioxidant ; Antioxidants - analysis ; Antioxidants - metabolism ; Antioxidants - radiation effects ; Biochemistry ; Biokemi ; Environment ; Plants - metabolism ; Plants - radiation effects ; Reactive Oxygen Species - analysis ; Reactive Oxygen Species - metabolism ; Reactive Oxygen Species - radiation effects ; ROS ; Signal Transduction - radiation effects ; signaling ; Stress, Physiological - radiation effects ; Ultraviolet Rays
Is Part Of: Trends in plant science, 2013-02, Vol.18 (2), p.107
Description: 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 UV-B doses cause 'eustress' (good stress) and that stimuli-specific signaling pathways pre-dispose plants to a state of low alert that includes activation of antioxidant defenses.
Publisher: England
Language: English
Identifier: ISSN: 1878-4372
ISSN: 1360-1385
EISSN: 1878-4372
DOI: 10.1016/j.tplants.2012.09.003
PMID: 23084465
Source: SWEPUB Freely available online

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UV-B exposure, ROS, and stress: inseparable companions or loosely linked associates?

Copyright © 2012 Elsevier Ltd. All rights reserved. ;ISSN: 1878-4372 ;ISSN: 1360-1385 ;EISSN: 1878-4372 ;DOI: 10.1016/j.tplants.2012.09.003 ;PMID: 23084465

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