Journal Article

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

Widiez, Thomas, ANR-17-CE20-0027,MIND-THE-GAP,Etude des mécanismes et implications physiologiques d'une voie de surveillance de l'intégrité polyvalente des barrières apoplastiques., Stintzi, A, Okuda, S, Swiss National Science Foundation (SNSF) Estonian Research Council NSR 31003A_176237Howard Hughes Medical Institute Human Frontier Science Program Carl-Zeiss Foundation, Ingram, Gwyneth, Schaller, A, Hothorn, M, Geldner, N, Reproduction et développement des plantes (RDP) ; École normale supérieure de Lyon (ENS de Lyon) ; Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Royek, S, Fujita, S, Chamot, S, Doll, N

2020

Overview

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 ABNORMAL LEAF SHAPE1 subtilase and the two GASSHO receptor-like kinases. We show that a sulfated peptide, TWISTED SEED1 (TWS1), acts as a GASSHO ligand. Cuticle surveillance depends on the action of the subtilase, which, unlike the TWS1 precursor and the GASSHO receptors, is not produced in the embryo but in the neighboring endosperm. Subtilase-mediated processing of the embryo-derived TWS1 precursor releases the active peptide, triggering GASSHO-dependent cuticle reinforcement in the embryo. Thus, a bidirectional molecular dialogue between embryo and endosperm safeguards cuticle integrity before germination.

• Publisher: American Association for the Advancement of Science (AAAS),CCSD,American Association for the Advancement of Science,The American Association for the Advancement of Science
• Subject: Amino Acid Sequence / Embryology / Embryos / Endosperm / Endosperm - cytology / Endosperm - metabolism / Endosperm - physiology / Germination / Hydrophobicity / Kinases / Life Sciences / Ligands / Nicotiana - growth & development / Nicotiana - metabolism / Peptides / Plant Proteins - chemistry / Plant Proteins - metabolism / Precursors / Protein Kinases - chemistry / Protein Kinases - metabolism / Receptors / Seedlings / Seeds - cytology / Seeds - metabolism / Seeds - physiology / Serine Endopeptidases - chemistry / Serine Endopeptidases - metabolism / Signal Transduction / Signaling / Subtilase / Vegetal Biology / Water loss
• ISBN: 0005098102000