Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 508044
Title Quiescent center initiation in the Arabidopsis lateral root primordia is dependent on the SCARECROW transcription factor
Author(s) Goh, Tatsuaki; Toyokura, Koichi; Wells, Darren M.; Swarup, Kamal; Yamamoto, Mayuko; Mimura, Tetsuro; Weijers, Dolf; Fukaki, Hidehiro; Laplaze, Laurent; Bennett, Malcolm J.; Guyomarc’h, Soazig
Source Development 143 (2016)18. - ISSN 0950-1991 - p. 3363 - 3371.
DOI http://dx.doi.org/10.1242/dev.135319
Department(s) Biochemistry
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) 3D live imaging - Arabidopsis thaliana - Lateral root organogenesis - Quiescent center - SCARECROW
Abstract

Lateral root formation is an important determinant of root system architecture. In Arabidopsis, lateral roots originate from pericycle cells, which undergo a program of morphogenesis to generate a new lateral root meristem. Despite its importance for root meristem organization, the onset of quiescent center (QC) formation during lateral root morphogenesis remains unclear. Here, we used live 3D confocal imaging to monitor cell organization and identity acquisition during lateral root development. Our dynamic observations revealed an early morphogenesis phase and a late meristem formation phase as proposed in the bi-phasic growth model. Establishment of lateral root QCs coincided with this developmental phase transition. QC precursor cells originated from the outer layer of stage II lateral root primordia, within which the SCARECROW (SCR) transcription factor was specifically expressed. Disrupting SCR function abolished periclinal divisions in this lateral root primordia cell layer and perturbed the formation of QC precursor cells. We conclude that de novo QC establishment in lateral root primordia operates via SCR-mediated formative cell division and coincides with the developmental phase transition.

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