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Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process

Establishment of the root-nodule symbiosis in legumes involves rhizobial infection of nodule primordia in the root cortex that is dependent on rhizobia crossing the root epidermal barrier. Two mechanisms have been described: either through root hair infection threads or through the intercellular pas...

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Autores principales: Quilbé, Johan, Montiel, Jesús, Arrighi, Jean-François, Stougaard, Jens
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9260380/
https://www.ncbi.nlm.nih.gov/pubmed/35812902
http://dx.doi.org/10.3389/fpls.2022.922982
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author Quilbé, Johan
Montiel, Jesús
Arrighi, Jean-François
Stougaard, Jens
author_facet Quilbé, Johan
Montiel, Jesús
Arrighi, Jean-François
Stougaard, Jens
author_sort Quilbé, Johan
collection PubMed
description Establishment of the root-nodule symbiosis in legumes involves rhizobial infection of nodule primordia in the root cortex that is dependent on rhizobia crossing the root epidermal barrier. Two mechanisms have been described: either through root hair infection threads or through the intercellular passage of bacteria. Among the legume genera investigated, around 75% use root hair entry and around 25% the intercellular entry mode. Root-hair infection thread-mediated infection has been extensively studied in the model legumes Medicago truncatula and Lotus japonicus. In contrast, the molecular circuit recruited during intercellular infection, which is presumably an ancient and simpler pathway, remains poorly known. In recent years, important discoveries have been made to better understand the transcriptome response and the genetic components involved in legumes with obligate (Aeschynomene and Arachis spp.) and conditional (Lotus and Sesbania spp.) intercellular rhizobial infections. This review addresses these novel findings and briefly considers possible future research to shed light on the molecular players that orchestrate intercellular infection in legumes.
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spelling pubmed-92603802022-07-08 Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process Quilbé, Johan Montiel, Jesús Arrighi, Jean-François Stougaard, Jens Front Plant Sci Plant Science Establishment of the root-nodule symbiosis in legumes involves rhizobial infection of nodule primordia in the root cortex that is dependent on rhizobia crossing the root epidermal barrier. Two mechanisms have been described: either through root hair infection threads or through the intercellular passage of bacteria. Among the legume genera investigated, around 75% use root hair entry and around 25% the intercellular entry mode. Root-hair infection thread-mediated infection has been extensively studied in the model legumes Medicago truncatula and Lotus japonicus. In contrast, the molecular circuit recruited during intercellular infection, which is presumably an ancient and simpler pathway, remains poorly known. In recent years, important discoveries have been made to better understand the transcriptome response and the genetic components involved in legumes with obligate (Aeschynomene and Arachis spp.) and conditional (Lotus and Sesbania spp.) intercellular rhizobial infections. This review addresses these novel findings and briefly considers possible future research to shed light on the molecular players that orchestrate intercellular infection in legumes. Frontiers Media S.A. 2022-06-23 /pmc/articles/PMC9260380/ /pubmed/35812902 http://dx.doi.org/10.3389/fpls.2022.922982 Text en Copyright © 2022 Quilbé, Montiel, Arrighi and Stougaard. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Quilbé, Johan
Montiel, Jesús
Arrighi, Jean-François
Stougaard, Jens
Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process
title Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process
title_full Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process
title_fullStr Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process
title_full_unstemmed Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process
title_short Molecular Mechanisms of Intercellular Rhizobial Infection: Novel Findings of an Ancient Process
title_sort molecular mechanisms of intercellular rhizobial infection: novel findings of an ancient process
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9260380/
https://www.ncbi.nlm.nih.gov/pubmed/35812902
http://dx.doi.org/10.3389/fpls.2022.922982
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