Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Developmental patterning of sub-epidermal cells in the outer integument of Arabidopsis seeds

Abstract : The seed, the reproductive unit of angiosperms, is generally protected by the seed coat. The seed coat is made of one or two integuments, each comprising two epidermal cells layers and, in some cases, extra sub-epidermal cell layers. The thickness of the seed-coat affects several aspects of seed biology such as dormancy, germination and mortality. In Arabidopsis, the inner integument displays one or two sub-epidermal cell layers that originate from periclinal cell divisions of the innermost epidermal cell layer. By contrast, the outer integument was considered to be two-cell layered. Here, we show that sub-epidermal chalazal cells grow in between the epidermal outer integument cell layers to create an incomplete three-cell layered outer integument. We found that the MADS box transcription factor TRANSPARENT TESTA 16 represses growth of the chalaza and formation of sub-epidermal outer integument cells. Finally, we demonstrate that sub-epidermal cells of the outer and inner integument respond differently to the repressive mechanism mediated by FERTILIZATION INDEPENDENT SEED Polycomb group proteins and to fertilization signals. Our data suggest that integument cell origin rather than sub-epidermal cell position underlies different responses to fertilization.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [27 références]  Voir  Masquer  Télécharger

https://hal.inrae.fr/hal-02628553
Déposant : Migration Prodinra <>
Soumis le : mardi 26 mai 2020 - 23:23:10
Dernière modification le : mercredi 14 octobre 2020 - 03:58:32

Fichier

2017_Fiume_Plos One_1.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Licence


Distributed under a Creative Commons Paternité 4.0 International License

Identifiants

Collections

Citation

Elisa Fiume, Olivier Coen, Wenjia Xu, Loic Lepiniec, Enrico Magnani. Developmental patterning of sub-epidermal cells in the outer integument of Arabidopsis seeds. PLoS ONE, Public Library of Science, 2017, 12 (11), pp.1-10. ⟨10.1371/journal.pone.0188148⟩. ⟨hal-02628553⟩

Partager

Métriques

Consultations de la notice

19

Téléchargements de fichiers

28