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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...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2019
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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 |
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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 |
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