Bradyrhizobium BclA Is a Peptide Transporter Required for Bacterial Differentiation in Symbiosis with Aeschynomene Legumes
| Autor: | Ibtissem Guefrachi, Olivier Pierre, Tatiana Timchenko, Benoît Alunni, Quentin Barrière, Pierre Czernic, José-Antonio Villaécija-Aguilar, Camille Verly, Mickaël Bourge, Joël Fardoux, Mohamed Mars, Eva Kondorosi, Eric Giraud, Peter Mergaert |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Molecular Plant-Microbe Interactions, Vol 28, Iss 11, Pp 1155-1166 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1943-7706 0894-0282 |
| DOI: | 10.1094/MPMI-04-15-0094-R |
| Popis: | Nodules of legume plants are highly integrated symbiotic systems shaped by millions of years of evolution. They harbor nitrogen-fixing rhizobium bacteria called bacteroids. Several legume species produce peptides called nodule-specific cysteine-rich (NCR) peptides in the symbiotic nodule cells which house the bacteroids. NCR peptides are related to antimicrobial peptides of innate immunity. They induce the endosymbionts into a differentiated, enlarged, and polyploid state. The bacterial symbionts, on their side, evolved functions for the response to the NCR peptides. Here, we identified the bclA gene of Bradyrhizobium sp. strains ORS278 and ORS285, which is required for the formation of differentiated and functional bacteroids in the nodules of the NCR peptide-producing Aeschynomene legumes. The BclA ABC transporter promotes the import of NCR peptides and provides protection against the antimicrobial activity of these peptides. Moreover, BclA can complement the role of the related BacA transporter of Sinorhizobium meliloti, which has a similar symbiotic function in the interaction with Medicago legumes. |
| Databáze: | Directory of Open Access Journals |
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