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REGULATION OF ROOT APICAL MERISTEM DEVELOPMENT

REGULATION OF ROOT APICAL MERISTEM DEVELOPMENT Abstract The establishment of the Angiosperm root apical meristem is dependent on the specification of a stem cell niche and the subsequent development of the quiescent center at the presumptive root pole. Distribution of auxin and the establishment of auxin maxima are early formative steps in niche specification that depend on the expression and distribution of auxin carriers. Auxin specifies stem cell niche formation by directly and indirectly affecting gene activities. Part of the indirect regulation by auxin may involve changes in redox, favoring local, oxidized microenvironments. Formation of a QC is required for root meristem development and elaboration. Many signals likely pass between the QC and the adjacent root meristem tissues. Disappearance of the QC is associated with roots becoming determinate. Given the many auxin feedback loops, we hypothesize that roots evolved as part of an auxin homeostasis mechanism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Cell and Developmental Biology Annual Reviews

REGULATION OF ROOT APICAL MERISTEM DEVELOPMENT

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Publisher
Annual Reviews
Copyright
Copyright © 2005 by Annual Reviews. All rights reserved
ISSN
1081-0706
eISSN
1530-8995
DOI
10.1146/annurev.cellbio.21.122303.114753
pmid
16212504
Publisher site
See Article on Publisher Site

Abstract

Abstract The establishment of the Angiosperm root apical meristem is dependent on the specification of a stem cell niche and the subsequent development of the quiescent center at the presumptive root pole. Distribution of auxin and the establishment of auxin maxima are early formative steps in niche specification that depend on the expression and distribution of auxin carriers. Auxin specifies stem cell niche formation by directly and indirectly affecting gene activities. Part of the indirect regulation by auxin may involve changes in redox, favoring local, oxidized microenvironments. Formation of a QC is required for root meristem development and elaboration. Many signals likely pass between the QC and the adjacent root meristem tissues. Disappearance of the QC is associated with roots becoming determinate. Given the many auxin feedback loops, we hypothesize that roots evolved as part of an auxin homeostasis mechanism.

Journal

Annual Review of Cell and Developmental BiologyAnnual Reviews

Published: Nov 10, 2005

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