Legumes symbioses: absence of Nod genes in photosynthetic bradyrhizobia.

Détails

ID Serval
serval:BIB_D83D5820DA94
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Legumes symbioses: absence of Nod genes in photosynthetic bradyrhizobia.
Périodique
Science
Auteur(s)
Giraud E., Moulin L., Vallenet D., Barbe V., Cytryn E., Avarre J.C., Jaubert M., Simon D., Cartieaux F., Prin Y., Bena G., Hannibal L., Fardoux J., Kojadinovic M., Vuillet L., Lajus A., Cruveiller S., Rouy Z., Mangenot S., Segurens B., Dossat C., Franck W.L., Chang W.S., Saunders E., Bruce D., Richardson P., Normand P., Dreyfus B., Pignol D., Stacey G., Emerich D., Verméglio A., Médigue C., Sadowsky M.
ISSN
1095-9203[electronic]
Statut éditorial
Publié
Date de publication
2007
Volume
316
Numéro
5829
Pages
1307-1312
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Résumé
Leguminous plants (such as peas and soybeans) and rhizobial soil bacteria are symbiotic partners that communicate through molecular signaling pathways, resulting in the formation of nodules on legume roots and occasionally stems that house nitrogen-fixing bacteria. Nodule formation has been assumed to be exclusively initiated by the binding of bacterial, host-specific lipochito-oligosaccharidic Nod factors, encoded by the nodABC genes, to kinase-like receptors of the plant. Here we show by complete genome sequencing of two symbiotic, photosynthetic, Bradyrhizobium strains, BTAi1 and ORS278, that canonical nodABC genes and typical lipochito-oligosaccharidic Nod factors are not required for symbiosis in some legumes. Mutational analyses indicated that these unique rhizobia use an alternative pathway to initiate symbioses, where a purine derivative may play a key role in triggering nodule formation.
Mots-clé
Acyltransferases/genetics, Acyltransferases/metabolism, Amidohydrolases/genetics, Amidohydrolases/metabolism, Bacterial Proteins/genetics, Bacterial Proteins/metabolism, Bradyrhizobium/genetics, Bradyrhizobium/growth &amp, development, Cytokinins/metabolism, Fabaceae/microbiology, Genes, Bacterial, Genome, Bacterial, Genomics, Lipopolysaccharides/metabolism, Molecular Sequence Data, Mutation, N-Acetylglucosaminyltransferases/genetics, N-Acetylglucosaminyltransferases/metabolism, Photosynthesis, Plant Roots/microbiology, Plant Stems/microbiology, Purines/biosynthesis, Root Nodules, Plant/microbiology, Root Nodules, Plant/physiology, Signal Transduction, Symbiosis
Pubmed
Web of science
Création de la notice
13/03/2008 11:26
Dernière modification de la notice
03/03/2018 21:50
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