Cargando…
Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices
The bulk polar movement of the plant signaling molecule auxin through the stem is a long-recognized but poorly understood phenomenon. Here we show that the highly polar, high conductance polar auxin transport stream (PATS) is only part of a multimodal auxin transport network in the stem. The dynamic...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847802/ https://www.ncbi.nlm.nih.gov/pubmed/27119525 http://dx.doi.org/10.1371/journal.pbio.1002446 |
_version_ | 1782429262342520832 |
---|---|
author | Bennett, Tom Hines, Geneviève van Rongen, Martin Waldie, Tanya Sawchuk, Megan G. Scarpella, Enrico Ljung, Karin Leyser, Ottoline |
author_facet | Bennett, Tom Hines, Geneviève van Rongen, Martin Waldie, Tanya Sawchuk, Megan G. Scarpella, Enrico Ljung, Karin Leyser, Ottoline |
author_sort | Bennett, Tom |
collection | PubMed |
description | The bulk polar movement of the plant signaling molecule auxin through the stem is a long-recognized but poorly understood phenomenon. Here we show that the highly polar, high conductance polar auxin transport stream (PATS) is only part of a multimodal auxin transport network in the stem. The dynamics of auxin movement through stems are inconsistent with a single polar transport regime and instead suggest widespread low conductance, less polar auxin transport in the stem, which we term connective auxin transport (CAT). The bidirectional movement of auxin between the PATS and the surrounding tissues, mediated by CAT, can explain the complex auxin transport kinetics we observe. We show that the auxin efflux carriers PIN3, PIN4, and PIN7 are major contributors to this auxin transport connectivity and that their activity is important for communication between shoot apices in the regulation of shoot branching. We propose that the PATS provides a long-range, consolidated stream of information throughout the plant, while CAT acts locally, allowing tissues to modulate and be modulated by information in the PATS. |
format | Online Article Text |
id | pubmed-4847802 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-48478022016-05-07 Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices Bennett, Tom Hines, Geneviève van Rongen, Martin Waldie, Tanya Sawchuk, Megan G. Scarpella, Enrico Ljung, Karin Leyser, Ottoline PLoS Biol Research Article The bulk polar movement of the plant signaling molecule auxin through the stem is a long-recognized but poorly understood phenomenon. Here we show that the highly polar, high conductance polar auxin transport stream (PATS) is only part of a multimodal auxin transport network in the stem. The dynamics of auxin movement through stems are inconsistent with a single polar transport regime and instead suggest widespread low conductance, less polar auxin transport in the stem, which we term connective auxin transport (CAT). The bidirectional movement of auxin between the PATS and the surrounding tissues, mediated by CAT, can explain the complex auxin transport kinetics we observe. We show that the auxin efflux carriers PIN3, PIN4, and PIN7 are major contributors to this auxin transport connectivity and that their activity is important for communication between shoot apices in the regulation of shoot branching. We propose that the PATS provides a long-range, consolidated stream of information throughout the plant, while CAT acts locally, allowing tissues to modulate and be modulated by information in the PATS. Public Library of Science 2016-04-27 /pmc/articles/PMC4847802/ /pubmed/27119525 http://dx.doi.org/10.1371/journal.pbio.1002446 Text en © 2016 Bennett et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Bennett, Tom Hines, Geneviève van Rongen, Martin Waldie, Tanya Sawchuk, Megan G. Scarpella, Enrico Ljung, Karin Leyser, Ottoline Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices |
title | Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices |
title_full | Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices |
title_fullStr | Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices |
title_full_unstemmed | Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices |
title_short | Connective Auxin Transport in the Shoot Facilitates Communication between Shoot Apices |
title_sort | connective auxin transport in the shoot facilitates communication between shoot apices |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847802/ https://www.ncbi.nlm.nih.gov/pubmed/27119525 http://dx.doi.org/10.1371/journal.pbio.1002446 |
work_keys_str_mv | AT bennetttom connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT hinesgenevieve connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT vanrongenmartin connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT waldietanya connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT sawchukmegang connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT scarpellaenrico connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT ljungkarin connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices AT leyserottoline connectiveauxintransportintheshootfacilitatescommunicationbetweenshootapices |