Endosperm Persistence in Arabidopsis Results in Seed Coat Fractures and Loss of Seed Longevity

[EN] Seeds are specialized plant organs that carry, nurture, and protect plant offspring. Developmental coordination between the three genetically distinct seed tissues (the embryo, endosperm, and seed coat) is crucial for seed viability. In this study, we explore the relationship between the TFs At...

ver descrição completa

Detalhes bibliográficos
Autores: Renard, Joan|||0000-0003-1797-1578, Bissoli, Gaetano|||0000-0002-5069-1212, Planes Ferrer, Mª Dolores|||0000-0002-5347-8660, Gadea Vacas, José|||0000-0002-3612-7914, Serrano Salom, Ramón, Bueso Rodenas, Eduardo|||0000-0002-0828-121X, Naranjo, Miguel Angel, Ingram, Gwineth
Tipo de documento: artigo
Data de publicação:2023
País:España
Recursos:Universitat Politècnica de València (UPV)
Repositório:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglês
OAI Identifier:oai:riunet.upv.es:10251/210281
Acesso em linha:https://riunet.upv.es/handle/10251/210281
Access Level:Acceso aberto
Palavra-chave:Seed longevity
Seed coat
Endosperm
Fissures
AtHB25
ICE1
Lignin
Arabidopsis
BIOQUIMICA Y BIOLOGIA MOLECULAR
Descrição
Resumo:[EN] Seeds are specialized plant organs that carry, nurture, and protect plant offspring. Developmental coordination between the three genetically distinct seed tissues (the embryo, endosperm, and seed coat) is crucial for seed viability. In this study, we explore the relationship between the TFs AtHB25 and ICE1. Previous results identified ICE1 as a target gene of AtHB25. In seeds, a lack of ICE1 (ice1-2) suppresses the enhanced seed longevity and impermeability of the overexpressing mutant athb25-1D, but surprisingly, seed coat lipid polyester deposition is not affected, as shown by the double-mutant athb25-1D ice1-2 seeds. zou-4, another mutant lacking the transcriptional program for proper endosperm maturation and for which the endosperm persists, also presents a high sensitivity to seed aging. Analysis of gso1, gso2, and tws1-4 mutants revealed that a loss of embryo cuticle integrity does not underlie the seed-aging sensitivity of ice1-2 and zou-4. However, scanning electron microscopy revealed the presence of multiple fractures in the seed coats of the ice1 and zou mutants. Thus, this study highlights the importance of both seed coat composition and integrity in ensuring longevity and demonstrates that these parameters depend on multiple factors.

Registros relacionados