Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process
Nodule formation in legume plants was assumed to be exclusively initiated by the binding of bacterial host-specific lipochitooligosaccharidic Nod factors to kinase-like receptors of the plant. Recently, sequence analysis of the genomes of two photosynthetic Bradyrhizobium strains (ORS278 and BTAi1), symbiotic of some Aeschynomene species, overturned this dogma because these bacteria lack the canonical nodulation genes (nodABC) involved in the synthesis of Nod factors [1]. This indicates that certain rhizobia use another mechanism to trigger nodule organogenesis in legumes. The most relevant characteristic of the photosynthetic Bradyrhizobium genomes will be presented. To identify the bacterial genes involved during this symbiosis, we individually screened a large Tn5 mutant library (20,000 mutants) of Bradyrhizobium ORS278 strain for their inability to induce nodules on Aeschynomene or to fix nitrogen. Results of this screening strategy will also be discussed. (Texte intégral)
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Subjects: | F62 - Physiologie végétale - Croissance et développement, Aeschynomene, Bradyrhizobium, http://aims.fao.org/aos/agrovoc/c_159, http://aims.fao.org/aos/agrovoc/c_27138, |
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dig-cirad-fr-5475252024-01-28T16:39:03Z http://agritrop.cirad.fr/547525/ http://agritrop.cirad.fr/547525/ Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process. Bonaldi Katia, Cartieaux Fabienne, Fardoux Joël, Hannibal Laure, Bastien G., Moulin Lionel, Nouwen Nico, Prin Yves, Renier Adeline, Giraud Eric. 2008. In : 8th European Nitrogen Fixation Conference, August 30 - September 3, 2008, Gent, Belgium. s.l. : s.n., Résumé, 1 p. European Nitrogen Fixation Conference. 8, Ghent, Belgique, 30 Août 2008/3 Septembre 2008. Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process Bonaldi, Katia Cartieaux, Fabienne Fardoux, Joël Hannibal, Laure Bastien, G. Moulin, Lionel Nouwen, Nico Prin, Yves Renier, Adeline Giraud, Eric eng 2008 s.n. 8th European Nitrogen Fixation Conference, August 30 - September 3, 2008, Gent, Belgium F62 - Physiologie végétale - Croissance et développement Aeschynomene Bradyrhizobium http://aims.fao.org/aos/agrovoc/c_159 http://aims.fao.org/aos/agrovoc/c_27138 Nodule formation in legume plants was assumed to be exclusively initiated by the binding of bacterial host-specific lipochitooligosaccharidic Nod factors to kinase-like receptors of the plant. Recently, sequence analysis of the genomes of two photosynthetic Bradyrhizobium strains (ORS278 and BTAi1), symbiotic of some Aeschynomene species, overturned this dogma because these bacteria lack the canonical nodulation genes (nodABC) involved in the synthesis of Nod factors [1]. This indicates that certain rhizobia use another mechanism to trigger nodule organogenesis in legumes. The most relevant characteristic of the photosynthetic Bradyrhizobium genomes will be presented. To identify the bacterial genes involved during this symbiosis, we individually screened a large Tn5 mutant library (20,000 mutants) of Bradyrhizobium ORS278 strain for their inability to induce nodules on Aeschynomene or to fix nitrogen. Results of this screening strategy will also be discussed. (Texte intégral) conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/547525/1/document_547525.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html |
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F62 - Physiologie végétale - Croissance et développement Aeschynomene Bradyrhizobium http://aims.fao.org/aos/agrovoc/c_159 http://aims.fao.org/aos/agrovoc/c_27138 F62 - Physiologie végétale - Croissance et développement Aeschynomene Bradyrhizobium http://aims.fao.org/aos/agrovoc/c_159 http://aims.fao.org/aos/agrovoc/c_27138 |
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F62 - Physiologie végétale - Croissance et développement Aeschynomene Bradyrhizobium http://aims.fao.org/aos/agrovoc/c_159 http://aims.fao.org/aos/agrovoc/c_27138 F62 - Physiologie végétale - Croissance et développement Aeschynomene Bradyrhizobium http://aims.fao.org/aos/agrovoc/c_159 http://aims.fao.org/aos/agrovoc/c_27138 Bonaldi, Katia Cartieaux, Fabienne Fardoux, Joël Hannibal, Laure Bastien, G. Moulin, Lionel Nouwen, Nico Prin, Yves Renier, Adeline Giraud, Eric Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process |
description |
Nodule formation in legume plants was assumed to be exclusively initiated by the binding of bacterial host-specific lipochitooligosaccharidic Nod factors to kinase-like receptors of the plant. Recently, sequence analysis of the genomes of two photosynthetic Bradyrhizobium strains (ORS278 and BTAi1), symbiotic of some Aeschynomene species, overturned this dogma because these bacteria lack the canonical nodulation genes (nodABC) involved in the synthesis of Nod factors [1]. This indicates that certain rhizobia use another mechanism to trigger nodule organogenesis in legumes. The most relevant characteristic of the photosynthetic Bradyrhizobium genomes will be presented. To identify the bacterial genes involved during this symbiosis, we individually screened a large Tn5 mutant library (20,000 mutants) of Bradyrhizobium ORS278 strain for their inability to induce nodules on Aeschynomene or to fix nitrogen. Results of this screening strategy will also be discussed. (Texte intégral) |
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F62 - Physiologie végétale - Croissance et développement Aeschynomene Bradyrhizobium http://aims.fao.org/aos/agrovoc/c_159 http://aims.fao.org/aos/agrovoc/c_27138 |
author |
Bonaldi, Katia Cartieaux, Fabienne Fardoux, Joël Hannibal, Laure Bastien, G. Moulin, Lionel Nouwen, Nico Prin, Yves Renier, Adeline Giraud, Eric |
author_facet |
Bonaldi, Katia Cartieaux, Fabienne Fardoux, Joël Hannibal, Laure Bastien, G. Moulin, Lionel Nouwen, Nico Prin, Yves Renier, Adeline Giraud, Eric |
author_sort |
Bonaldi, Katia |
title |
Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process |
title_short |
Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process |
title_full |
Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process |
title_fullStr |
Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process |
title_full_unstemmed |
Interaction between Aeschynomene and photosynthetic Bradyrhizobium: An enigmatic Nod-independent symbiotic process |
title_sort |
interaction between aeschynomene and photosynthetic bradyrhizobium: an enigmatic nod-independent symbiotic process |
publisher |
s.n. |
url |
http://agritrop.cirad.fr/547525/ http://agritrop.cirad.fr/547525/1/document_547525.pdf |
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