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Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects
Leaf venation patterns vary considerably between species and between leaves within a species. A mechanism based on canalization of auxin transport has been suggested as the means by which plastic yet organized venation patterns are generated. This study assessed the plasticity of Arabidopsis thalian...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3431004/ https://www.ncbi.nlm.nih.gov/pubmed/22936832 http://dx.doi.org/10.1093/jxb/ers196 |
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author | Wenzel, C. L. Marrison, J. Mattsson, J. Haseloff, J. Bougourd, S. M. |
author_facet | Wenzel, C. L. Marrison, J. Mattsson, J. Haseloff, J. Bougourd, S. M. |
author_sort | Wenzel, C. L. |
collection | PubMed |
description | Leaf venation patterns vary considerably between species and between leaves within a species. A mechanism based on canalization of auxin transport has been suggested as the means by which plastic yet organized venation patterns are generated. This study assessed the plasticity of Arabidopsis thaliana leaf venation in response to ectopic ground or procambial cell divisions and auxin transport inhibition (ATI). Ectopic ground cell divisions resulted in vascular fragments between major veins, whereas ectopic procambial cell divisions resulted in additional, abnormal vessels along major veins, with more severely perturbed lines forming incomplete secondary and higher-order venation. These responses imply limited vascular plasticity in response to unscheduled cell divisions. Surprisingly, a combination of ectopic ground cell divisions and ATI resulted in massive vascular overgrowth. It is hypothesized that the vascular overproduction in auxin transport-inhibited wild-type leaves is limited by simultaneous differentiation of ground cells into mesophyll cells. Ectopic ground cell divisions may negate this effect by providing undifferentiated ground cells that respond to accumulated auxin by differentiation into vascular cells. |
format | Online Article Text |
id | pubmed-3431004 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-34310042012-08-30 Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects Wenzel, C. L. Marrison, J. Mattsson, J. Haseloff, J. Bougourd, S. M. J Exp Bot Research Paper Leaf venation patterns vary considerably between species and between leaves within a species. A mechanism based on canalization of auxin transport has been suggested as the means by which plastic yet organized venation patterns are generated. This study assessed the plasticity of Arabidopsis thaliana leaf venation in response to ectopic ground or procambial cell divisions and auxin transport inhibition (ATI). Ectopic ground cell divisions resulted in vascular fragments between major veins, whereas ectopic procambial cell divisions resulted in additional, abnormal vessels along major veins, with more severely perturbed lines forming incomplete secondary and higher-order venation. These responses imply limited vascular plasticity in response to unscheduled cell divisions. Surprisingly, a combination of ectopic ground cell divisions and ATI resulted in massive vascular overgrowth. It is hypothesized that the vascular overproduction in auxin transport-inhibited wild-type leaves is limited by simultaneous differentiation of ground cells into mesophyll cells. Ectopic ground cell divisions may negate this effect by providing undifferentiated ground cells that respond to accumulated auxin by differentiation into vascular cells. Oxford University Press 2012-09 2012-08-29 /pmc/articles/PMC3431004/ /pubmed/22936832 http://dx.doi.org/10.1093/jxb/ers196 Text en © The Author [2012]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0/uk/) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Paper Wenzel, C. L. Marrison, J. Mattsson, J. Haseloff, J. Bougourd, S. M. Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects |
title | Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects |
title_full | Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects |
title_fullStr | Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects |
title_full_unstemmed | Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects |
title_short | Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects |
title_sort | ectopic divisions in vascular and ground tissues of arabidopsis thaliana result in distinct leaf venation defects |
topic | Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3431004/ https://www.ncbi.nlm.nih.gov/pubmed/22936832 http://dx.doi.org/10.1093/jxb/ers196 |
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