Your browser doesn't support javascript.
loading
Female gametophytic cell specification and seed development require the function of the putative Arabidopsis INCENP ortholog WYRD.
Kirioukhova, Olga; Johnston, Amal J; Kleen, Daniela; Kägi, Christina; Baskar, Ramamurthy; Moore, James M; Bäumlein, Helmut; Gross-Hardt, Rita; Grossniklaus, Ueli.
Afiliação
  • Kirioukhova O; Institute of Plant Biology and Zürich-Basel Plant Science Center, University of Zürich, Zürich, Switzerland.
Development ; 138(16): 3409-20, 2011 Aug.
Article em En | MEDLINE | ID: mdl-21752930
In plants, gametes, along with accessory cells, are formed by the haploid gametophytes through a series of mitotic divisions, cell specification and differentiation events. How the cells in the female gametophyte of flowering plants differentiate into gametes (the egg and central cell) and accessory cells remains largely unknown. In a screen for mutations that affect egg cell differentiation in Arabidopsis, we identified the wyrd (wyr) mutant, which produces additional egg cells at the expense of the accessory synergids. WYR not only restricts gametic fate in the egg apparatus, but is also necessary for central cell differentiation. In addition, wyr mutants impair mitotic divisions in the male gametophyte and endosperm, and have a parental effect on embryo cytokinesis, consistent with a function of WYR in cell cycle regulation. WYR is upregulated in gametic cells and encodes a putative plant ortholog of the inner centromere protein (INCENP), which is implicated in the control of chromosome segregation and cytokinesis in yeast and animals. Our data reveal a novel developmental function of the conserved cell cycle-associated INCENP protein in plant reproduction, in particular in the regulation of egg and central cell fate and differentiation.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arabidopsis / Proteínas de Ciclo Celular / Proteínas de Arabidopsis / Óvulo Vegetal Idioma: En Ano de publicação: 2011 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arabidopsis / Proteínas de Ciclo Celular / Proteínas de Arabidopsis / Óvulo Vegetal Idioma: En Ano de publicação: 2011 Tipo de documento: Article