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Research article - Peer-reviewed, 2021

Pickle Recruits Retinoblastoma Related 1 to Control Lateral Root Formation in Arabidopsis

Otvos, Krisztina; Miskolczi, Pal; Marhavy, Peter; Cruz-Ramirez, Alfredo; Benkova, Eva; Robert, Stephanie; Bako, Laszlo

Abstract

Lateral root (LR) formation is an example of a plant post-embryonic organogenesis event. LRs are issued from non-dividing cells entering consecutive steps of formative divisions, proliferation and elongation. The chromatin remodeling protein PICKLE (PKL) negatively regulates auxin-mediated LR formation through a mechanism that is not yet known. Here we show that PKL interacts with RETINOBLASTOMA-RELATED 1 (RBR1) to repress the LATERAL ORGAN BOUNDARIES-DOMAIN 16 (LBD16) promoter activity. Since LBD16 function is required for the formative division of LR founder cells, repression mediated by the PKL-RBR1 complex negatively regulates formative division and LR formation. Inhibition of LR formation by PKL-RBR1 is counteracted by auxin, indicating that, in addition to auxin-mediated transcriptional responses, the fine-tuned process of LR formation is also controlled at the chromatin level in an auxin-signaling dependent manner.

Keywords

chromatin remodeling; auxin signaling; de novo organogenesis

Published in

International Journal of Molecular Sciences
2021, volume: 22, number: 8, article number: 3862
Publisher: MDPI

Authors' information

Otvos, Krisztina
Umea University
Otvos, Krisztina
Institute of Science and Technology - Austria
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Marhavy, Peter
Institute of Science and Technology - Austria
Cruz-Ramirez, Alfredo
CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional
Benkova, Eva
Institute of Science and Technology - Austria
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Bako, Laszlo
Umea University

UKÄ Subject classification

Botany
Biochemistry and Molecular Biology

Publication Identifiers

DOI: https://doi.org/10.3390/ijms22083862

URI (permanent link to this page)

https://res.slu.se/id/publ/111948