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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
PUCHI represses early meristem formation in developing lateral roots of Arabidopsis thaliana
Journal of Experimental Botany, Volume 73, No. 11, Year 2022
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Description
Lateral root organogenesis is a key process in the development of a plant's root system and its adaptation to the environment. During lateral root formation, an early phase of cell proliferation first produces a four-cell-layered primordium, and only from this stage onwards is a root meristem-like structure, expressing root stem cell niche marker genes, being established in the developing organ. Previous studies reported that the gene regulatory network controlling lateral root formation is organized into two subnetworks whose mutual inhibition may contribute to organ patterning. PUCHI encodes an AP2/ERF transcription factor expressed early during lateral root primordium development and required for correct lateral root formation. To dissect the molecular events occurring during this early phase, we generated time-series transcriptomic datasets profiling lateral root development in puchi-1 mutants and wild types. Transcriptomic and reporter analyses revealed that meristem-related genes were expressed ectopically at early stages of lateral root formation in puchi-1 mutants. We conclude that, consistent with the inhibition of genetic modules contributing to lateral root development, PUCHI represses ectopic establishment of meristematic cell identities at early stages of organ development. These findings shed light on gene network properties that orchestrate correct timing and patterning during lateral root formation. © 2022 The Author(s) 2022.
Authors & Co-Authors
Dubois, Emeric
France, Paris
Inserm
France, Montpellier
Montpellier Genomix
Petitot, Anne Sophie
France, Montpellier
Ird Centre de Montpellier
Lucas, Mikaël
France, Montpellier
Ird Centre de Montpellier
Champion, Antony
France, Montpellier
Ird Centre de Montpellier
Gantet, Pascal P.
France, Montpellier
Ird Centre de Montpellier
Laplaze, Laurent
France, Montpellier
Ird Centre de Montpellier
Guyomarc'H, Soazig
France, Montpellier
Ird Centre de Montpellier
Statistics
Citations: 6
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1093/jxb/erac079
ISSN:
00220957
Research Areas
Genetics And Genomics