A two-way molecular dialogue between embryo and endosperm is required for seed development.
Journal
Science (New York, N.Y.)
ISSN: 1095-9203
Titre abrégé: Science
Pays: United States
ID NLM: 0404511
Informations de publication
Date de publication:
24 01 2020
24 01 2020
Historique:
received:
06
09
2019
accepted:
18
12
2019
entrez:
25
1
2020
pubmed:
25
1
2020
medline:
22
4
2020
Statut:
ppublish
Résumé
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.
Identifiants
pubmed: 31974252
pii: 367/6476/431
doi: 10.1126/science.aaz4131
doi:
Substances chimiques
Ligands
0
Plant Proteins
0
Protein Kinases
EC 2.7.-
Serine Endopeptidases
EC 3.4.21.-
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
431-435Subventions
Organisme : Swiss National Science Foundation
Pays : Switzerland
Organisme : Howard Hughes Medical Institute
Pays : United States
Informations de copyright
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.