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Microtubules and actin filaments direct nuclear movement during the polarisation of Marchantia spore cells.
Attrill, Sarah T; Mulvey, Hugh; Champion, Clément; Dolan, Liam.
Afiliación
  • Attrill ST; Gregor Mendel Institute, Dr Bohr-Gasse 3, Vienna 1030, Austria.
  • Mulvey H; Department of Biology, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
  • Champion C; Gregor Mendel Institute, Dr Bohr-Gasse 3, Vienna 1030, Austria.
  • Dolan L; Department of Biology, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
Development ; 151(20)2024 Oct 15.
Article en En | MEDLINE | ID: mdl-39041335
ABSTRACT
The multicellular haploid stage of land plants develops from a single haploid cell produced by meiosis - the spore. Starting from a non-polar state, these spores develop polarity, divide asymmetrically and establish the first axis of symmetry. Here, we show that the nucleus migrates from the cell centroid to the basal pole during polarisation of the Marchantia polymorpha spore cell. A microtubule organising centre on the leading edge of the nucleus initiates a microtubule array between the nuclear surface and the cortex at the basal pole. Simultaneously, cortical microtubules disappear from the apical hemisphere but persist in the basal hemisphere. This is accompanied by the formation a dense network of fine actin filaments between the nucleus and the basal pole cortex. Experimental depolymerisation of either microtubules or actin filaments disrupts cellular asymmetry. These data demonstrate that the cytoskeleton reorganises during spore polarisation and controls the directed migration of the nucleus to the basal pole. The presence of the nucleus at the basal pole provides the cellular asymmetry for the asymmetric cell division that establishes the apical-basal axis of the plant.
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Texto completo: 1 Base de datos: MEDLINE Asunto principal: Esporas / Citoesqueleto de Actina / Núcleo Celular / Polaridad Celular / Marchantia / Microtúbulos Idioma: En Revista: Development Asunto de la revista: BIOLOGIA / EMBRIOLOGIA Año: 2024 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Esporas / Citoesqueleto de Actina / Núcleo Celular / Polaridad Celular / Marchantia / Microtúbulos Idioma: En Revista: Development Asunto de la revista: BIOLOGIA / EMBRIOLOGIA Año: 2024 Tipo del documento: Article