Cell cycle status of male and female gametes during Arabidopsis reproduction

Fertilization in Arabidopsis (Arabidopsis thaliana) is a highly coordinated process that begins with a pollen tube delivering the 2 sperm cells into the embryo sac. Each sperm cell can then fertilize either the egg or the central cell to initiate embryo or endosperm development, respectively. The su...

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Detalles Bibliográficos
Autores: Voichek, Yoav, Hurieva, Bohdana, Michaud, Caroline, Schmücker, Anna, Vergara, Zaida, Desvoyes, Benedicte, Gutiérrez Armenta, Crisanto, Nizhynska, Viktoria, Jaegle, Benjamin, Borg, Michael, Berger, Frédéric, Nordborg, Magnus, Ingouff, Mathieu
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/366545
Acceso en línea:http://hdl.handle.net/10261/366545
Access Level:acceso abierto
Descripción
Sumario:Fertilization in Arabidopsis (Arabidopsis thaliana) is a highly coordinated process that begins with a pollen tube delivering the 2 sperm cells into the embryo sac. Each sperm cell can then fertilize either the egg or the central cell to initiate embryo or endosperm development, respectively. The success of this double fertilization process requires a tight cell cycle synchrony between the male and female gametes to allow karyogamy (nuclei fusion). However, the cell cycle status of the male and female gametes during fertilization remains elusive as DNA quantification and DNA replication assays have given conflicting results. Here, to reconcile these results, we quantified the DNA replication state by DNA sequencing and performed microscopic analyses of fluorescent markers covering all phases of the cell cycle. We show that male and female Arabidopsis gametes are both arrested prior to DNA replication at maturity and initiate their DNA replication only during fertilization.