Article thumbnail
Location of Repository

A two-way molecular dialogue between embryo and endosperm required for seed development

By Nicolas Doll, S. Royek, S. Fujita, S. Okuda, A. Stintzi, Thomas Widiez, M. Hothorn, A. Schaller, N. Geldner and Gwyneth Ingram

Abstract

The plant embryonic cuticle is a hydrophobic barrier deposited de novo by the embryo during seed development. At germination it protects the seedling from water loss and is thus critical for survival. Embryonic cuticle formation is controlled by a signaling pathway involving the protease ALE1 and the receptor-like kinases GSO1 and GSO2. We show that a sulfated peptide, TWISTED SEED1 (TWS1) acts as a GSO1/GSO2 ligand. Cuticle surveillance depends on the action of ALE1 which, unlike TWS1 and GSO1/2, is not produced in the embryo but in the neighboring endosperm. Cleavage of an embryo-derived TWS1 precursor by ALE1 releases the active peptide, triggering GSO1/2-dependent cuticle reinforcement in the embryo. A bidirectional molecular dialogue between embryo and endosperm thus safeguards cuticle integrity prior to germination

Topics: seed, arabidopsis, embryo, seed albumins, development, arabidopsis, embryon, semence, endosperme, développement, [SDV]Life Sciences [q-bio]
Publisher: HAL CCSD
Year: 2019
DOI identifier: 10.1101/809368
OAI identifier: oai:HAL:hal-02423303v1
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://hal.archives-ouvertes.... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.