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Perturbations in plant energy homeostasis prime lateral root initiation via SnRK1-bZIP63-ARF19 signaling

Muralidhara, Prathibha (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
Weiste, Christoph (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
Collani, Silvio (författare)
Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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Krischke, Markus (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
Kreisz, Philipp (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
Draken, Jan (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
Feil, Regina (författare)
Department of Metabolic networks, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
Mair, Andrea (författare)
Department of Biology, Stanford University, CA, Stanford, United States
Teige, Markus (författare)
Department of Biochemistry and Cell Biology, University of Vienna, Vienna, Austria; Department of Molecular Systems Biology, University of Vienna, Vienna, Austria
Müller, Martin J. (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
Schmid, Markus (författare)
Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
Becker, Dirk (författare)
Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Würzburg, Germany
Lunn, John E. (författare)
Department of Metabolic networks, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
Rolland, Filip (författare)
Laboratory of Molecular Plant Biology, Department of Biology, Katholieke Universiteit Leuven, Leuven, Belgium; KU Leuven Plant Institute (LPI), Heverlee-Leuven, Belgium
Hanson, Johannes, 1969- (författare)
Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
Dröge-Laser, Wolfgang (författare)
Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter. Julius-Maximilians Universität Würzburg, Würzburg, Germany
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Department of Pharmaceutical Biology, Julius-von-Sachs-Institute, Biocenter Julius-Maximilians Universität Würzburg, Würzburg, Germany Institutionen för fysiologisk botanik (creator_code:org_t)
2021-09-09
2021
Engelska.
Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 118:37
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Plants adjust their energy metabolism to continuous environmental fluctuations, resulting in a tremendous plasticity in their architecture. The regulatory circuits involved, however, remain largely unresolved. In Arabidopsis, moderate perturbations in photosynthetic activity, administered by short-term low light exposure or unexpected darkness, lead to increased lateral root (LR) initiation. Consistent with expression of low-energy markers, these treatments alter energy homeostasis and reduce sugar availability in roots. Here, we demonstrate that the LR response requires the metabolic stress sensor kinase Snf1-RELATED-KINASE1 (SnRK1), which phosphorylates the transcription factor BASIC LEUCINE ZIPPER63 (bZIP63) that directly binds and activates the promoter of AUXIN RESPONSE FACTOR19 (ARF19), a key regulator of LR initiation. Consistently, starvation-induced ARF19 transcription is impaired in bzip63 mutants. This study highlights a positive developmental function of SnRK1. During energy limitation, LRs are initiated and primed for outgrowth upon recovery. Hence, this study provides mechanistic insights into how energy shapes the agronomically important root system.

Ämnesord

NATURVETENSKAP  -- Biologi -- Cellbiologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Cell Biology (hsv//eng)
NATURVETENSKAP  -- Biologi -- Genetik (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Genetics (hsv//eng)

Nyckelord

ARF19
BZIP63
Lateral root
Metabolic homeostasis
SnRK1

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