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Pàgina inicial > Articles > Articles publicats > A Sizer model for cell differentiation in Arabidopsis thaliana root growth |
Data: | 2018 |
Resum: | Plant roots grow due to cell division in the meristem and subsequent cell elongation and differentiation, a tightly coordinated process that ensures growth and adaptation to the changing environment. How the newly formed cells decide to stop elongating becoming fully differentiated is not yet understood. To address this question, we established a novel approach that combines the quantitative phenotypic variability of wild-type Arabidopsis roots with computational data from mathematical models. Our analyses reveal that primary root growth is consistent with a Sizer mechanism, in which cells sense their length and stop elongating when reaching a threshold value. The local expression of brassinosteroid receptors only in the meristem is sufficient to set this value. Analysis of roots insensitive to signaling and of roots with gibberellin biosynthesis inhibited suggests distinct roles of these hormones on cell expansion termination. Overall, our study underscores the value of using computational modeling together with quantitative data to understand root growth. |
Ajuts: | European Commission 683163 European Commission 612583 Ministerio de Economía y Competitividad BIO2016-78955 Ministerio de Economía y Competitividad SEV-2015-0533 Ministerio de Economía y Competitividad FIS2015-66503-C3-3-P Ministerio de Economía y Competitividad BIO2013-43873 Ministerio de Economía y Competitividad FIS2012-37655-C02-02 Ministerio de Economía y Competitividad FIS2009-13360-C03-01 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-878 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Arabidopsis root zonation ; Brassinosteroids ; Cell differentiation ; Computational analysis ; Phenotypic variability ; Development & Differentiation ; Plant Biology ; Quantitative Biology & Dynamical Systems |
Publicat a: | Molecular systems biology, Vol. 14, issue 1 (Jan. 2018) , e7687, ISSN 1744-4292 |
18 p, 3.7 MB |