Cargando…

Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway

The majority of land plants have two suberized root barriers: the endodermis and the hypodermis (exodermis). Both barriers bear non-suberized passage cells that are thought to regulate water and nutrient exchange between the root and the soil. We learned a lot about endodermal passage cells, whereas...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, Guowei, Stirnemann, Marina, Gübeli, Christian, Egloff, Susanne, Courty, Pierre-Emmanuel, Aubry, Sylvain, Vandenbussche, Michiel, Morel, Patrice, Reinhardt, Didier, Martinoia, Enrico, Borghi, Lorenzo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611997/
https://www.ncbi.nlm.nih.gov/pubmed/31276958
http://dx.doi.org/10.1016/j.isci.2019.06.024
_version_ 1783432803659022336
author Liu, Guowei
Stirnemann, Marina
Gübeli, Christian
Egloff, Susanne
Courty, Pierre-Emmanuel
Aubry, Sylvain
Vandenbussche, Michiel
Morel, Patrice
Reinhardt, Didier
Martinoia, Enrico
Borghi, Lorenzo
author_facet Liu, Guowei
Stirnemann, Marina
Gübeli, Christian
Egloff, Susanne
Courty, Pierre-Emmanuel
Aubry, Sylvain
Vandenbussche, Michiel
Morel, Patrice
Reinhardt, Didier
Martinoia, Enrico
Borghi, Lorenzo
author_sort Liu, Guowei
collection PubMed
description The majority of land plants have two suberized root barriers: the endodermis and the hypodermis (exodermis). Both barriers bear non-suberized passage cells that are thought to regulate water and nutrient exchange between the root and the soil. We learned a lot about endodermal passage cells, whereas our knowledge on hypodermal passage cells (HPCs) is still very scarce. Here we report on factors regulating the HPC number in Petunia roots. Strigolactones exhibit a positive effect, whereas supply of abscisic acid (ABA), ethylene, and auxin result in a strong reduction of the HPC number. Unexpectedly the strigolactone signaling mutant d14/dad2 showed significantly higher HPC numbers than the wild-type. In contrast, its mutant counterpart max2 of the heterodimeric receptor DAD2/MAX2 displayed a significant decrease in HPC number. A mutation in the Petunia karrikin sensor KAI2 exhibits drastically decreased HPC amounts, supporting the hypothesis that the dimeric KAI2/MAX2 receptor is central in determining the HPC number.
format Online
Article
Text
id pubmed-6611997
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher Elsevier
record_format MEDLINE/PubMed
spelling pubmed-66119972019-07-17 Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway Liu, Guowei Stirnemann, Marina Gübeli, Christian Egloff, Susanne Courty, Pierre-Emmanuel Aubry, Sylvain Vandenbussche, Michiel Morel, Patrice Reinhardt, Didier Martinoia, Enrico Borghi, Lorenzo iScience Article The majority of land plants have two suberized root barriers: the endodermis and the hypodermis (exodermis). Both barriers bear non-suberized passage cells that are thought to regulate water and nutrient exchange between the root and the soil. We learned a lot about endodermal passage cells, whereas our knowledge on hypodermal passage cells (HPCs) is still very scarce. Here we report on factors regulating the HPC number in Petunia roots. Strigolactones exhibit a positive effect, whereas supply of abscisic acid (ABA), ethylene, and auxin result in a strong reduction of the HPC number. Unexpectedly the strigolactone signaling mutant d14/dad2 showed significantly higher HPC numbers than the wild-type. In contrast, its mutant counterpart max2 of the heterodimeric receptor DAD2/MAX2 displayed a significant decrease in HPC number. A mutation in the Petunia karrikin sensor KAI2 exhibits drastically decreased HPC amounts, supporting the hypothesis that the dimeric KAI2/MAX2 receptor is central in determining the HPC number. Elsevier 2019-06-20 /pmc/articles/PMC6611997/ /pubmed/31276958 http://dx.doi.org/10.1016/j.isci.2019.06.024 Text en © 2019 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Liu, Guowei
Stirnemann, Marina
Gübeli, Christian
Egloff, Susanne
Courty, Pierre-Emmanuel
Aubry, Sylvain
Vandenbussche, Michiel
Morel, Patrice
Reinhardt, Didier
Martinoia, Enrico
Borghi, Lorenzo
Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway
title Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway
title_full Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway
title_fullStr Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway
title_full_unstemmed Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway
title_short Strigolactones Play an Important Role in Shaping Exodermal Morphology via a KAI2-Dependent Pathway
title_sort strigolactones play an important role in shaping exodermal morphology via a kai2-dependent pathway
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611997/
https://www.ncbi.nlm.nih.gov/pubmed/31276958
http://dx.doi.org/10.1016/j.isci.2019.06.024
work_keys_str_mv AT liuguowei strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT stirnemannmarina strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT gubelichristian strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT egloffsusanne strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT courtypierreemmanuel strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT aubrysylvain strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT vandenbusschemichiel strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT morelpatrice strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT reinhardtdidier strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT martinoiaenrico strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway
AT borghilorenzo strigolactonesplayanimportantroleinshapingexodermalmorphologyviaakai2dependentpathway