AP2/ERF transcription factors orchestrate very long chain fatty acid biosynthesis during Arabidopsis lateral root development
2021
Guyomarc'H, Soazig | Boutté, Yohann | Laplaze, Laurent | Diversité, adaptation, développement des plantes (UMR DIADE) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie]) | Laboratoire de biogenèse membranaire (LBM) ; Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) | Plateforme Bordeaux Metabolome ; Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-MetaboHUB-Bordeaux ; MetaboHUB-MetaboHUB | ANR-17-CE13-0004,NewRoot,Propriétés du réseau de gènes contrôlant la formation des nouvelles racines latérales chez les plantes(2017) | ANR-18-CE13-0025,caLIPSO,Mécanismes du pattern lipidique du réseau trans-Golgien (trans-Golgi Network) et rôles dans le tri des protéines, la polarité cellulaire et le développement des plantes(2018)
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Show more [+] Less [-]English. One key factor defining root system architecture is root branching, i.e., the process of the formation of new root axes, called lateral roots (LRs), from an existing root. In the model plant Arabidopsis thaliana, LRs originate from preselected pericycle cells that divide to create an LR primordium (LRP) that grows and eventually forms a new root apical meristem (Banda et al., 2019). During this developmental process, cell-fate acquisition is very plastic and depends on positional information rather than on cell lineage (Banda et al., 2019). Importantly, LR formation occurs inside the parent root, and the LRP must grow through overlying tissues before emerging into the soil. This LR emergence process is controlled by dynamic intercellular signaling and involves a tight coordination of cellular responses in the LRP and surrounding tissues (Banda et al., 2019). In particular, the growing LRP rapidly pushes against the overlying endodermis, a layer of cells mechanically reinforced by the Casparian strip. The crossing of the endodermis by the LRP between stages IV and V has been proposed as an important developmental checkpoint during LR development (Banda et al., 2019)
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