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Identification of Early Nuclear Target Genes of Plastidial Redox Signals that Trigger the Long- Term Response of Arabidopsis to Light Quality Sh∽ts

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Molecular Plant 2015年第8期8卷 1237-1252页

作者： Lars Dietzel Christine Glaeer Monique Liebers Stefan Hiekel Florence Courtois olaf czarneckit Hagen Schlicke Yan Zubo Thomas Borner Klaus Mayer Bernhard Grimm Thomas Pfannschmidt Department of Plant Physiology Institute of General Botany and Plant Physiology Friedrich-Schiller-University of Jena Domburger Strasse 159 07743 JenaGermany MIPS/IBI Helmholtz Zentrum MGnchen German Research Center for Environmental Health (GmbH) Ingolst~dter Landstrasse 1 85764 Neuherberg Germany Institute of Biology/Plant Physiology Humboldt-University Berlin Philippstrasse 13 Building 12 10115 Berlin Germany Institute of Biology Genetics Humboldt-University Berlin Chausseestrasse 117 10115 Berlin Germany present address: Institut fer Molekulare Biowissenschaften Pflanzliche Zellphysiologie Max-von-Laue-Strasse 9 Biozentrum Goethe-Universit~t Frankfurt 60438Frankfurt am Main Germany Present address: Zentrum fur Molekulare Biologie an der Universitat zu Heidelberg (ZMBH) Im Neuenheimer Feld 282 69120 Heidelberg Germany present address: Universite Grenoble-Alpes F-38000 Grenoble France Present address: CNRS UMR5168 F-38054 Grenoble France present address: CEA iRTSV Laboratoire de Physiologie Cellulaire & Vgetale F-38054 Grenoble France Present address: INRA USC1359 F-38054 Grenoble France Present address: Plant Reproductive Biology Group Department of Physiology and Ceil-Biology Leibniz Institute of Rant Genetics and Crop Plant Research (IPK)OT Gatersleben Corrensstrasse 3 D-06466 Stadt Seeland Germany present address: KWS Saat AG Grimsehlstrasse 31 37555 Einbeck Germany present address: Dartmouth College Department of Biological Sciences Ufe Sciences Center 78 College Street Hanover NH 03755 USA

Natural illumination conditions are highly variable and because of their sessile life style, plants are forced to acclimate to them at the cellular and molecular level. Changes in light intensity or quality induce changes in the reduction/oxidation （redox） state of the photosynthetic electron chain that acts as a trigger for compen- satory acclimation responses comprising functional and structural adjustments of photosynthesis and metabolism. Such responses include redox-controlled changes in plant gene expression in the nucleus and organelles. Here we describe a strategy for the identification of early redox-regulated genes （ERGs） in the nucleus of the model organism Arabidopsis thaliana that respond significantly 30 or 60 min after the generation of a reduction signal in the photosynthetic electron transport chain. By comparing the response of wild-type plants with that of the acclimation mutant stn7, we could specifically identify ERGs. The results reveal a significant impact of chloroplast redox signals on distinct nuclear gene groups including genes for the mitochondrial electron transport chain, tetrapyrrole biosynthesis, carbohydrate metabolism, and signaling lipid synthesis. These expression profiles are clearly different from those observed in response to the reduction of photosynthetic electron transport by high light treatments. Thus, the ERGs identified are unique to redox imbalances in photosynthetic electron transport and were then used for analyzing potential redox-responsive cis-elements, trans-factors, and chromosomal regulatory hot spots. The data identify a novel redox-responsive element and indicate extensive redox control at transcriptional and chromosomal levels that point to an unprecedented impact of redox signals on epigenetic processes.

关键词： plastidial redox signaling,early redox-regulated gene Arabidopsis thaliana Molecular Plant

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