Co-Authors:
Alsharafa, K., Biochemistry and Physiology of Plants, Bielefeld University, Bielefeld 33501, Germany, Biological Sciences Department, Mu'tah University, PO Box 7, 61710, Mu'tah/Al-Karak, Jordan
Vogel, M.O., Biochemistry and Physiology of Plants, Bielefeld University, Bielefeld 33501, Germany, Proteome and Metabolome Research, Bielefeld University, 33501 Bielefeld, Germany
Oelze, M.-L., Biochemistry and Physiology of Plants, Bielefeld University, Bielefeld 33501, Germany
Moore, M., Biochemistry and Physiology of Plants, Bielefeld University, Bielefeld 33501, Germany
Stingl, N., Pharmaceutical Biology, Julius-von-Sachs-Institute for Biosciences, University of Wuerzburg, Wuerzburg, Germany
König, K., Biochemistry and Physiology of Plants, Bielefeld University, Bielefeld 33501, Germany
Friedman, H., Postharvest Science of Fresh Produce, ARO, The Volcani Center, Bet Dagan 50250, Israel
Mueller, M.J., Pharmaceutical Biology, Julius-von-Sachs-Institute for Biosciences, University of Wuerzburg, Wuerzburg, Germany
Dietz, K.-J., Biochemistry and Physiology of Plants, Bielefeld University, Bielefeld 33501, Germany
Abstract:
High light acclimation depends on retrograde control of nuclear gene expression. Retrograde regulation uses multiple signalling pathways and thus exploits signal patterns. To maximally challenge the acclimation system,Arabidopsis thaliana plants were either adapted to 8 (low light (L-light)) or 80 μmol quanta m-2 s-1 (normal light (N-light)) and subsequently exposed to a 100- and 10-fold light intensity increase, respectively, to high light (H-light, 800 μmol quanta m-2 s-1), for up to 6 h. Both L → H- and N → H-light plants efficiently regulated CO2 assimilation to a constant level without apparent damage and inhibition. This experimental set-up was scrutinized for time-dependent regulation and efficiency of adjustment. Transcriptome profiles revealed that N-light and L-light plants differentially accumulated 2119 transcripts. After 6 h in H-light, only 205 remained differently regulated between the L → H- and N → H-light plants, indicating efficient regulation allowing the plants to reach a similar transcriptome state. Time-dependent analysis of transcripts as markers for signalling pathways, and of metabolites and hormones as possibly involved transmitters, suggests that oxylipins such as oxophytodienoic acid and jasmonic acid, metabolites and redox cues predominantly control the acclimation response, whereas abscisic acid, salicylic acid and auxins play an insignificant or minor role. © 2014 The Author(s) Published by the Royal Society. All rights reserved.
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