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Moulin Lionel, James E.K., Klonowska Agnieszka, Miana de Faria S., Simon M.F. (2015). Phylogeny, diversity, geographical distribution, and host range of legume-nodulating betaproteobacteria : what Is the role of plant taxonomy ?. In : De Bruijn F.J (ed.). Biological nitrogen fixation. Chichester : J. Wiley, 177-190. ISBN 978-1-119-05309-5

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Titre
Phylogeny, diversity, geographical distribution, and host range of legume-nodulating betaproteobacteria : what Is the role of plant taxonomy ?
Année de publication2015
Type de documentPartie d'ouvrage
AuteursMoulin Lionel, James E.K., Klonowska Agnieszka, Miana de Faria S., Simon M.F.
InDe Bruijn F.J (ed.). Biological nitrogen fixation
SourceChichester : J. Wiley, 2015, p. 177-190. ISBN 978-1-119-05309-5
Résuméhe class Betaproteobacteria contains several related genera that associate closely (and non-pathogenically) with plants. Recent studies have highlighted the emerging importance of newly-discovered legume-nodulating bacteria in the genera Burkholderia and Cupriavidus, the so-called “beta-rhizobia”. Nine species of nodulating burkholderias have been described so far, most being ancient (ca. 50 my) symbionts of many of the 500 species in the large genus Mimosa, but also of several other species of the legume tribe Mimoseae (Mimosoideae). Nodulation in these species by beta-rhizobia is thought to have emerged through the ancient lateral transfer of nodulation genes to their endophytic ancestors, followed by mainly vertical transfer (horizontal transfer being also detected in a few species), as illustrated by the parallelism between phylogenies of taxonomic and symbiotic markers. In contrast to Burkholderia, the most studied Cupriavidus species, C. taiwanensis, is considered to be a very recent legume symbiont that only nodulates a few invasive Mimosa spp. On the plant side, genera belonging to the tribe Mimoseae (especially those in the Piptadenia Group, which includes the genera Mimosa and Piptadenia) and several species in Papilionoid genera endemic to the Fynbos in the Cape region of South Africa exhibit particular affinities for beta-rhizobia. Legume taxonomy thus appears to give some insights into the potential nodulation of plants by beta-rhizobia. This is particularly exemplified by the genus Mimosa, within which there are clades of geographically-isolated endemics that clearly have evolved to have preferences for specific symbiont types (either alpha- or beta-proteobacterial). On the other hand, although many of the relatives of Mimosa (e.g., species in Piptadenia) share their preferences for beta-rhizobial symbionts, this is not always the case, and, indeed, there is no obvious strict pattern of coevolution between species in the wider tribe Mimoseae and their symbionts (beta-rhizobial or otherwise). This is discussed in terms of the broad host ranges of both symbiotic partners, and the horizontal transfer of nodulation genes between the Burkholderia species.
Plan de classementBiotechnologies [084] ; Sciences du monde végétal [076]
LocalisationFonds IRD [F B010070132]
Identifiant IRDfdi:010070132
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070132

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