Journal article

WOX5–IAA17 feedback circuit-mediated cellular auxin response is crucial for the patterning of root stem cell niches in Arabidopsis

  • Tian, Huiyu The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, China
  • Wabnik, Krzysztof Department of Plant Systems Biology, VIB and Department of Plant Biotechnology and Bio-informatics, Ghent University, Belgium
  • Niu, Tiantian The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, China
  • Li, Hanbing Department of Biochemistry, University of Missouri, Columbia, USA
  • Yu, Qianqian The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, China
  • Pollmann, Stephan Ruhr-Universität Bochum, Lehrstuhl für Pflanzenphysiologie, Germany - Centro de Biotecnología y Genómica de Plantas (UPM–INIA), Madrid, Spain
  • Vanneste, Steffen Department of Plant Systems Biology, VIB and Department of Plant Biotechnology and Bio-informatics, Ghent University, Belgium
  • Govaerts, Willy Department of Applied Mathematics and Computer Science, Ghent University, Belgium
  • Rolčík, Jakub Laboratory of Growth Regulators, Faculty of Science, Palacký University, Olomouc, Czech Republic
  • Geisler, Markus Department of Biology, Plant Biology, University of Fribourg, Switzerland
  • Friml, Jiří Department of Plant Systems Biology, VIB and Department of Plant Biotechnology and Bio-informatics, Ghent University, Belgium - Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
  • Ding, Zhaojun The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, China - Department of Plant Systems Biology, VIB and Department of Plant Biotechnology and Bio-informatics, Ghent University, Belgium
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    02.01.2014
Published in:
  • Molecular Plant. - 2014, vol. 7, no. 2, p. 277–289
English In plants, the patterning of stem cell-enriched meristems requires a graded auxin response maximum that emerges from the concerted action of polar auxin transport, auxin biosynthesis, auxin metabolism, and cellular auxin response machinery. However, mechanisms underlying this auxin response maximum-mediated root stem cell maintenance are not fully understood. Here, we present unexpected evidence that WUSCHEL-RELATED HOMEOBOX 5 (WOX5) transcription factor modulates expression of auxin biosynthetic genes in the quiescent center (QC) of the root and thus provides a robust mechanism for the maintenance of auxin response maximum in the root tip. This WOX5 action is balanced through the activity of indole-3-acetic acid 17 (IAA17) auxin response repressor. Our combined genetic, cell biology, and computational modeling studies revealed a previously uncharacterized feedback loop linking WOX5-mediated auxin production to IAA17-dependent repression of auxin responses. This WOX5–IAA17 feedback circuit further assures the maintenance of auxin response maximum in the root tip and thereby contributes to the maintenance of distal stem cell (DSC) populations. Our experimental studies and in silico computer simulations both demonstrate that the WOX5–IAA17 feedback circuit is essential for the maintenance of auxin gradient in the root tip and the auxin-mediated root DSC differentiation.
Faculty
Faculté des sciences et de médecine
Department
Département de Biologie
Language
  • English
Classification
Biological sciences
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303546
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