Burkholderia são simbiontes comuns e favoritos do grupo Piptadenia (tribo Mimoseae)

Bournaud Caroline, De Faria Sergio Miana, Santos Miguel, Tisseyre Pierre, Aparecida Pereira da Silva Michele, Chaintreuil Clémence, Gross Eduardo, James Euan K., Prin Yves, Moulino Lionel. 2012. Burkholderia são simbiontes comuns e favoritos do grupo Piptadenia (tribo Mimoseae). Boletim de Pesquisa e Desenvolvimento - Embrapa Agrobiologia (93) : 7-22.

Titre anglais : Burkholderia symbionts are common and favorite of the Piptadenia (Mimoseae tribe)

Résumé : Burkho/deria legume symbionts (also called a-rhizobia) are the main nitrogen-fixing symbionts of species belonging to the genus Mimosa in Brazil. We investigated the extent of the affinity between Burkholderia and species in the tribe Mimoseae by studying symbionts of the genera Piptadenia (P.), Parapiptadenia (Pp.), Pseudopiptadenia (Ps.), Pityrocarpa (Py.), Anadenanthera (A.) and Microlobius (Mi.), all of which are native to Brazil and are phylogenetically close to Mimosa, and which together with Mimosa comprise the "Piptadenia group". We characterized 196 strains sampled from 18 species from 17 locations in Brazil using two neutral markers and two symbiotic genes in order to assess their species affiliations and the evolution of their symbiosis genes. We found that Burkholderia are common and highly diversified symbionts of species in the Piptadenia group, comprising nine Burkholderia species, of which three are new ones and one was never reported as symbiotic (B. phenoliruptrix). Coinoculation assays showed a strong affinity of all the Piptadenia group species towards Burkholderia, with the exception of Mi. foetidus. Phylogenetic analyses of neutral and symbiotic markers showed that symbiosis genes in Burkholderia from the Piptadenia group have evolved mainly through vertical transfer, but also by horizontal transfer in two species. Keywords: Endophytic diazotrophic, Exopolymer, Prediction, Metabolic pathway.

Mots-clés Agrovoc : Mimosoideae, Rhizobactérie, bactérie fixatrice de l'azote, symbiote, Rhizobiaceae

Mots-clés géographiques Agrovoc : Brésil

Classification Agris : F01 - Culture des plantes
P34 - Biologie du sol

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Bournaud Caroline, CIRAD-BIOS-UMR LSTM (FRA)
• De Faria Sergio Miana, EMBRAPA (BRA)
• Santos Miguel, UESC (BRA)
• Tisseyre Pierre, IRD (FRA)
• Aparecida Pereira da Silva Michele, EMBRAPA (BRA)
• Chaintreuil Clémence, IRD (FRA)
• Gross Eduardo, UESC (BRA)
• James Euan K., The James Hutton Institute (GBR)
• Prin Yves, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0002-3706-0045
• Moulino Lionel, IRD (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/573814/)

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