Various scenarios of the cell pattern formation in Arabidopsis lateral root

Jolanta Białek,Izabela Potocka,Joanna M Szymanowska-Pułka

doi:10.5586/asbp.2014.005

Jolanta Białek, Izabela Potocka + Show 1 more

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https://doi.org/10.5586/asbp.2014.005

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Abstract

During lateral root (LR) development a coordinate sequence of cell divisions, accompanied by a change of the organ form takes place. Both the order of anatomical events and morphological features may vary for individual primordia. At early stages of LR primordia development oblique division walls are inserted in cells that are symmetrically located on both sides of the axis of the developing LR primordium, and thereby allow for the protrusion of the LR. We hypothesize that both oblique cell wall insertion and continuous changes in primordium form could be a consequence of a local change in stress distribution in the region of the LR initiation.

Highlights

Material and methodsLateral roots (LRs) develop from the pericycle cells that locally acquire competence to form postembryonic meristems
The proposed [3] scenario of events occurring during primordium development serves as a point of reference in studies on the LR formation. Based on these results we report and consider new morphological features that have hitherto not been described, with an emphasis on the occurrence of obliquely-oriented cell walls, irregularities in the cell division order, and primordia shapes
In most primordia a stage of development could be identified and sequence of divisions followed after Malamy and Benfey [3], yet, in some cases a departure from this order was found

Summary

Introduction

Material and methodsLateral roots (LRs) develop from the pericycle cells that locally acquire competence to form postembryonic meristems. At the site of the LR initiation two founder cells are visible, separated by the wall perpendicular to the root axis, in some primordia this wall is oblique (Fig. 1a).

Results

Conclusion