Cell size controlled in plants using DNA content as an internal scale

Author:

D’Ario Marco1ORCID,Tavares Rafael1ORCID,Schiessl Katharina1ORCID,Desvoyes Bénédicte2ORCID,Gutierrez Crisanto2ORCID,Howard Martin3ORCID,Sablowski Robert1ORCID

Affiliation:

1. Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, UK.

2. Centro de Biología Molecular Severo Ochoa, CSIC-UAM, Cantoblanco, 28049 Madrid, Spain.

3. Computational and Systems Biology, John Innes Centre, Norwich NR4 7UH, UK.

Abstract

Cell size set by cell cycle regulation In the Arabidopsis meristem, cell sizes are regularized despite asymmetric cell divisions. D'Ario et al. describe a balanced regulatory system that controls the duration of the growth phase of the cell cycle preceding DNA synthesis. KIP-related protein 4 (KRP4) inhibits progression to DNA synthesis. Because the amount of KRP4, which binds to mitotic chromosomes, is titrated to the amount of chromosomal DNA, daughter cells begin with similar amounts of KRP4 despite possible asymmetric cell divisions. Deviations are adjusted as excess KRP4 is degraded and the cell size is normalized. Science , abb4348, this issue p. 1176

Funder

Fundación Ramón Areces

Biotechnology and Biological Sciences Research Council

European Commission

John Innes Foundation

Ministerio de Ciencia e Innovación

Banco de Santander

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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