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Genetic and molecular mechanisms of post-embryonic root radial patterning

Genetic and molecular mechanisms of post-embryonic root radial patterning Arabidopsis root with its simple, consistent and well-defined pattern of cell division and growth is a highly tractable system for studying cellular development. The root apical meristem (RAM) of Arabidopsis, established post-embryonically is the main source of root cells. Complex bidirectional signaling between stem cells and mature root cells is required to maintain RAM activity. The Arabidopsis RAM comprises of a quiescent center (QC) and a niche of self-renewing stem cells that perform asymmetric (formative) cell divisions to generate daughter cells. These daughter cells subsequently divide symmetrically within delineated longitudinal cell files. The cells in the QC coordinate with neighboring stem cells to establish the balance between proliferation and differentiation in the meristem niche. The Arabidopsis primary root is composed of concentric rings of tissues (namely, the epidermis, the cortex, the endodermis and the pericycle, from the outside inwards) arranged in a radial axis that surrounds a central cylinder of vascular and procambial cells. Overlaid upon the radial organization of the root are three longitudinal zones viz, the meristem, the elongation zone and the differentiation zone, that describe cellular behavior. The boundaries of these domains are plastic and are largely regulated by antagonistic interactions between different phyto-hormones, which regulate the expression of key TFs. In this paper, we review the process of radial patterning in Arabidopsis thaliana post-embryonic root with an emphasis on genetic and molecular networks that determine the fate of each domain in the root. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Indian Journal of Plant Physiology Springer Journals

Genetic and molecular mechanisms of post-embryonic root radial patterning

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References (167)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Indian Society for Plant Physiology
Subject
Life Sciences; Plant Sciences; Plant Physiology; Plant Ecology; Plant Biochemistry; Cell Biology; Plant Genetics & Genomics
ISSN
0019-5502
eISSN
0974-0252
DOI
10.1007/s40502-016-0259-7
Publisher site
See Article on Publisher Site

Abstract

Arabidopsis root with its simple, consistent and well-defined pattern of cell division and growth is a highly tractable system for studying cellular development. The root apical meristem (RAM) of Arabidopsis, established post-embryonically is the main source of root cells. Complex bidirectional signaling between stem cells and mature root cells is required to maintain RAM activity. The Arabidopsis RAM comprises of a quiescent center (QC) and a niche of self-renewing stem cells that perform asymmetric (formative) cell divisions to generate daughter cells. These daughter cells subsequently divide symmetrically within delineated longitudinal cell files. The cells in the QC coordinate with neighboring stem cells to establish the balance between proliferation and differentiation in the meristem niche. The Arabidopsis primary root is composed of concentric rings of tissues (namely, the epidermis, the cortex, the endodermis and the pericycle, from the outside inwards) arranged in a radial axis that surrounds a central cylinder of vascular and procambial cells. Overlaid upon the radial organization of the root are three longitudinal zones viz, the meristem, the elongation zone and the differentiation zone, that describe cellular behavior. The boundaries of these domains are plastic and are largely regulated by antagonistic interactions between different phyto-hormones, which regulate the expression of key TFs. In this paper, we review the process of radial patterning in Arabidopsis thaliana post-embryonic root with an emphasis on genetic and molecular networks that determine the fate of each domain in the root.

Journal

Indian Journal of Plant PhysiologySpringer Journals

Published: Nov 17, 2016

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