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Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation

Controlling the production of diverse cell/tissue types is essential for the development of multicellular organisms such as animals and plants. The Arabidopsis thaliana root, which contains distinct cells/tissues along longitudinal and radial axes, has served as an elegant model to investigate how g...

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Autores principales: Choi, Ji Won, Lim, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Korean Society for Molecular and Cellular Biology 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4959016/
https://www.ncbi.nlm.nih.gov/pubmed/27306644
http://dx.doi.org/10.14348/molcells.2016.0105
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author Choi, Ji Won
Lim, Jun
author_facet Choi, Ji Won
Lim, Jun
author_sort Choi, Ji Won
collection PubMed
description Controlling the production of diverse cell/tissue types is essential for the development of multicellular organisms such as animals and plants. The Arabidopsis thaliana root, which contains distinct cells/tissues along longitudinal and radial axes, has served as an elegant model to investigate how genetic programs and environmental signals interact to produce different cell/tissue types. In the root, a series of asymmetric cell divisions (ACDs) give rise to three ground tissue layers at maturity (endodermis, middle cortex, and cortex). Because the middle cortex is formed by a periclinal (parallel to the axis) ACD of the endodermis around 7 to 14 days post-germination, middle cortex formation is used as a parameter to assess maturation of the root ground tissue. Molecular, genetic, and physiological studies have revealed that the control of the timing and extent of middle cortex formation during root maturation relies on the interaction of plant hormones and transcription factors. In particular, abscisic acid and gibberellin act synergistically to regulate the timing and extent of middle cortex formation, unlike their typical antagonism. The SHORT-ROOT, SCARECROW, SCARECROW-LIKE 3, and DELLA transcription factors, all of which belong to the plant-specific GRAS family, play key roles in the regulation of middle cortex formation. Recently, two additional transcription factors, SEUSS and GA- AND ABA-RESPONSIVE ZINC FINGER, have also been characterized during ground tissue maturation. In this review, we provide a detailed account of the regulatory networks that control the timing and extent of middle cortex formation during post-embryonic root development.
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spelling pubmed-49590162016-08-08 Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation Choi, Ji Won Lim, Jun Mol Cells Minireview Controlling the production of diverse cell/tissue types is essential for the development of multicellular organisms such as animals and plants. The Arabidopsis thaliana root, which contains distinct cells/tissues along longitudinal and radial axes, has served as an elegant model to investigate how genetic programs and environmental signals interact to produce different cell/tissue types. In the root, a series of asymmetric cell divisions (ACDs) give rise to three ground tissue layers at maturity (endodermis, middle cortex, and cortex). Because the middle cortex is formed by a periclinal (parallel to the axis) ACD of the endodermis around 7 to 14 days post-germination, middle cortex formation is used as a parameter to assess maturation of the root ground tissue. Molecular, genetic, and physiological studies have revealed that the control of the timing and extent of middle cortex formation during root maturation relies on the interaction of plant hormones and transcription factors. In particular, abscisic acid and gibberellin act synergistically to regulate the timing and extent of middle cortex formation, unlike their typical antagonism. The SHORT-ROOT, SCARECROW, SCARECROW-LIKE 3, and DELLA transcription factors, all of which belong to the plant-specific GRAS family, play key roles in the regulation of middle cortex formation. Recently, two additional transcription factors, SEUSS and GA- AND ABA-RESPONSIVE ZINC FINGER, have also been characterized during ground tissue maturation. In this review, we provide a detailed account of the regulatory networks that control the timing and extent of middle cortex formation during post-embryonic root development. Korean Society for Molecular and Cellular Biology 2016-07 2016-06-16 /pmc/articles/PMC4959016/ /pubmed/27306644 http://dx.doi.org/10.14348/molcells.2016.0105 Text en © The Korean Society for Molecular and Cellular Biology. All rights reserved. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/.
spellingShingle Minireview
Choi, Ji Won
Lim, Jun
Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation
title Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation
title_full Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation
title_fullStr Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation
title_full_unstemmed Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation
title_short Control of Asymmetric Cell Divisions during Root Ground Tissue Maturation
title_sort control of asymmetric cell divisions during root ground tissue maturation
topic Minireview
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4959016/
https://www.ncbi.nlm.nih.gov/pubmed/27306644
http://dx.doi.org/10.14348/molcells.2016.0105
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