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Quilbé J, Nouwen N, Pervent M, Guyonnet R, Cullimore J, Gressent F, Araújo NH, Gully D, Klopp C, Giraud E, Arrighi JF. A mutant-based analysis of the establishment of Nod-independent symbiosis in the legume Aeschynomene evenia. Plant Physiol 2022; 190:1400-1417. [PMID: 35876558 PMCID: PMC9516736 DOI: 10.1093/plphys/kiac325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
Intensive research on nitrogen-fixing symbiosis in two model legumes has uncovered the molecular mechanisms, whereby rhizobial Nod factors activate a plant symbiotic signaling pathway that controls infection and nodule organogenesis. In contrast, the so-called Nod-independent symbiosis found between Aeschynomene evenia and photosynthetic bradyrhizobia, which does not involve Nod factor recognition nor infection thread formation, is less well known. To gain knowledge on how Nod-independent symbiosis is established, we conducted a phenotypic and molecular characterization of A. evenia lines carrying mutations in different nodulation genes. Besides investigating the effect of the mutations on rhizobial symbiosis, we examined their consequences on mycorrhizal symbiosis and in nonsymbiotic conditions. Analyzing allelic mutant series for AePOLLUX, Ca2+/calmodulin dependent kinase, AeCYCLOPS, nodulation signaling pathway 2 (AeNSP2), and nodule inception demonstrated that these genes intervene at several stages of intercellular infection and during bacterial accommodation. We provide evidence that AeNSP2 has an additional nitrogen-dependent regulatory function in the formation of axillary root hairs at lateral root bases, which are rhizobia-colonized infection sites. Our investigation of the recently discovered symbiotic actor cysteine-rich receptor-like kinase specified that it is not involved in mycorrhization; however, it is essential for both symbiotic signaling and early infection during nodulation. These findings provide important insights on the modus operandi of Nod-independent symbiosis and contribute to the general understanding of how rhizobial-legume symbioses are established by complementing the information acquired in model legumes.
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Affiliation(s)
| | | | | | - Rémi Guyonnet
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J-Campus de Baillarguet, Montpellier 34398, France
| | - Julie Cullimore
- Laboratory of Plant-Microbe Interactions and Environment (LIPME), University Toulouse III, INRAE, CNRS, Castanet-Tolosan, France
| | - Frédéric Gressent
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J-Campus de Baillarguet, Montpellier 34398, France
- IRD, Plant Health Institute of Montpellier (PHIM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J – Campus de Baillarguet, Montpellier 34398, France
| | - Natasha Horta Araújo
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J-Campus de Baillarguet, Montpellier 34398, France
- IRD, Plant Health Institute of Montpellier (PHIM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J – Campus de Baillarguet, Montpellier 34398, France
| | - Djamel Gully
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J-Campus de Baillarguet, Montpellier 34398, France
- IRD, Plant Health Institute of Montpellier (PHIM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J – Campus de Baillarguet, Montpellier 34398, France
| | - Christophe Klopp
- Plateforme Bioinformatique Genotoul, BioinfoMics, UR875 Biométrie et Intelligence Artificielle, INRAE, Castanet-Tolosan, France
| | - Eric Giraud
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J-Campus de Baillarguet, Montpellier 34398, France
- IRD, Plant Health Institute of Montpellier (PHIM), UMR IRD/SupAgro/INRAE/UM/CIRAD, TA-A82/J – Campus de Baillarguet, Montpellier 34398, France
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Quilbé J, Lamy L, Brottier L, Leleux P, Fardoux J, Rivallan R, Benichou T, Guyonnet R, Becana M, Villar I, Garsmeur O, Hufnagel B, Delteil A, Gully D, Chaintreuil C, Pervent M, Cartieaux F, Bourge M, Valentin N, Martin G, Fontaine L, Droc G, Dereeper A, Farmer A, Libourel C, Nouwen N, Gressent F, Mournet P, D'Hont A, Giraud E, Klopp C, Arrighi JF. Genetics of nodulation in Aeschynomene evenia uncovers mechanisms of the rhizobium-legume symbiosis. Nat Commun 2021; 12:829. [PMID: 33547303 PMCID: PMC7864950 DOI: 10.1038/s41467-021-21094-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 01/07/2021] [Indexed: 01/30/2023] Open
Abstract
Among legumes (Fabaceae) capable of nitrogen-fixing nodulation, several Aeschynomene spp. use a unique symbiotic process that is independent of Nod factors and infection threads. They are also distinctive in developing root and stem nodules with photosynthetic bradyrhizobia. Despite the significance of these symbiotic features, their understanding remains limited. To overcome such limitations, we conduct genetic studies of nodulation in Aeschynomene evenia, supported by the development of a genome sequence for A. evenia and transcriptomic resources for 10 additional Aeschynomene spp. Comparative analysis of symbiotic genes substantiates singular mechanisms in the early and late nodulation steps. A forward genetic screen also shows that AeCRK, coding a receptor-like kinase, and the symbiotic signaling genes AePOLLUX, AeCCamK, AeCYCLOPS, AeNSP2, and AeNIN are required to trigger both root and stem nodulation. This work demonstrates the utility of the A. evenia model and provides a cornerstone to unravel mechanisms underlying the rhizobium-legume symbiosis.
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Affiliation(s)
- Johan Quilbé
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Léo Lamy
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
- Plateforme Bioinformatique, Genotoul, BioinfoMics, UR875 Biométrie et Intelligence Artificielle, INRAE, Castanet-Tolosan, France
| | - Laurent Brottier
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Philippe Leleux
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
- Plateforme Bioinformatique, Genotoul, BioinfoMics, UR875 Biométrie et Intelligence Artificielle, INRAE, Castanet-Tolosan, France
| | - Joël Fardoux
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Ronan Rivallan
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | - Thomas Benichou
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Rémi Guyonnet
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Manuel Becana
- Departamento de Nutrición Vegetal, Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas, Apartado 13034, 50080, Zaragoza, Spain
| | - Irene Villar
- Departamento de Nutrición Vegetal, Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas, Apartado 13034, 50080, Zaragoza, Spain
| | - Olivier Garsmeur
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | - Bárbara Hufnagel
- BPMP, Université de Montpellier, CNRS, INRAE, SupAgro, Montpellier, France
| | - Amandine Delteil
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Djamel Gully
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Clémence Chaintreuil
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Marjorie Pervent
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Fabienne Cartieaux
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Mickaël Bourge
- Cytometry Facility, Imagerie-Gif, Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
| | - Nicolas Valentin
- Cytometry Facility, Imagerie-Gif, Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
| | - Guillaume Martin
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | - Loïc Fontaine
- BGPI, Université de Montpellier, CIRAD, INRA, Montpellier SupAgro, F-34398, Montpellier, France
| | - Gaëtan Droc
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | - Alexis Dereeper
- Institut de Recherche pour le Développement (IRD), University of Montpellier, DIADE, IPME, Montpellier, France
| | - Andrew Farmer
- National Center for Genome Resources, Santa Fe, NM, USA
| | - Cyril Libourel
- LRSV, Université de Toulouse, CNRS, UPS, Castanet-Tolosan, France
| | - Nico Nouwen
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Frédéric Gressent
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Pierre Mournet
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | - Angélique D'Hont
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | - Eric Giraud
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France
| | - Christophe Klopp
- Plateforme Bioinformatique, Genotoul, BioinfoMics, UR875 Biométrie et Intelligence Artificielle, INRAE, Castanet-Tolosan, France
| | - Jean-François Arrighi
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/ SupAgro/INRAE/ UM2 /CIRAD, TA-A82/J, Campus de Baillarguet 34398, Montpellier, cedex 5, France.
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