Control of Arabidopsis lateral root primordium boundaries by MYB36
| Autor: | Philip N. Benfey, Bénédicte Desvoyes, Juan Carlos del Pozo, Louisa M. Liberman, Concepción Manzano, María Fernández-Marcos, Crisanto Gutierrez |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Cell division Physiology MYB36 Arabidopsis Lateral root Plant Science Genes Plant Plant Roots Article 03 medical and health sciences Gene Expression Regulation Plant Casparian strip Botany Arabidopsis thaliana Homeostasis Primordium Cell Proliferation Peroxidase biology Arabidopsis Proteins Plant Meristem biology.organism_classification Cell biology 030104 developmental biology lipids (amino acids peptides and proteins) Endodermis Transcription factor Reactive Oxygen Species Transcription Factors |
| Zdroj: | Repositorio de Resultados de Investigación del INIA Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria INIA INIA: Repositorio de Resultados de Investigación del INIA |
| Popis: | Root branching in plants relies on the de novo formation of lateral roots. These are initiated from founder cells, triggering new formative divisions that generate lateral root primordia (LRP). The LRP size and shape depends on the balance between positive and negative signals that control cell proliferation. The mechanisms controlling proliferation potential of LRP cells remains poorly understood. We found that Arabidopsis thaliana MYB36, which have been previously shown to regulate genes required for Casparian strip formation and the transition from proliferation to differentiation in the primary root, plays a new role in controlling LRP development at later stages. We found that MYB36 is a novel component of LR development at later stages. MYB36 was expressed in the cells surrounding LRP where it controls a set of peroxidase genes, which maintain reactive oxygen species (ROS) balance. This was required to define the transition between proliferating and arrested cells inside the LRP, coinciding with the change from flat to dome-shaped primordia. Reducing the levels of hydrogen peroxide (H2O2) in myb36-5 significantly rescues the mutant phenotype. Our results uncover a role for MYB36 outside the endodermis during LRP development through a mechanism analogous to regulating the proliferation/differentiation transition in the root meristem. © 2016 The Authors. New Phytologist © 2016 New Phytologist Trust |
| Databáze: | OpenAIRE |
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