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Organ geometry channels reproductive cell fate in the Arabidopsis ovule primordium

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Hernandez-Lagana Elvira, Mosca Gabriella, Mendocilla-Sato Ethel, Pires Nuno, Frey Anja, Giraldo-Fonseca Alejandro, Michaud Caroline, Grossniklaus Ueli, Hamant Olivier, Godin Christophe, Boudaoud Arezki, Grimanelli Daniel, Autran Daphné, Baroux Célia,
Project IMAGO : Imaging and Modeling Growth and plasticity in plant Ovules
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Original article (peer-reviewed)

Journal eLife
Volume (Issue) 10
Page(s) 1
Title of proceedings eLife
DOI 10.7554/elife.66031

Open Access

URL http://doi.org/10.7554/eLife.66031
Type of Open Access Publisher (Gold Open Access)

Abstract

In multicellular organisms, sexual reproduction requires the separation of the germline from the soma. In flowering plants, the female germline precursor differentiates as a single spore mother cell (SMC) as the ovule primordium forms. Here, we explored how organ growth contributes to SMC differentiation. We generated 92 annotated 3D images at cellular resolution in Arabidopsis. We identified the spatio-temporal pattern of cell division that acts in a domain-specific manner as the primordium forms. Tissue growth models uncovered plausible morphogenetic principles involving a spatially confined growth signal, differential mechanical properties, and cell growth anisotropy. Our analysis revealed that SMC characteristics first arise in more than one cell but SMC fate becomes progressively restricted to a single cell during organ growth. Altered primordium geometry coincided with a delay in the fate restriction process in katanin mutants. Altogether, our study suggests that tissue geometry channels reproductive cell fate in the Arabidopsis ovule primordium.
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