Burkholderia species are ancient symbionts of legumes

Burkholderia has only recently been recognized as a potential nitrogen-fixing symbiont of legumes, but we find that the origins of symbiosis in Burkholderia are much deeper than previously suspected. We sampled 143 symbionts from 47 native species of Mimosa across 1800 km in central Brazil and found...

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Bibliographic Details
Published in:Molecular ecology 2010, Vol.19 (1), p.44-52
Main Authors: Bontemps, Cyril, Elliott, Geoffrey N, Simon, Marcelo F, Reis Junior, Fabio B. dos, Gross, Eduardo, Lawton, Rebecca C, Neto, Nicolau Elias, Loureiro, Maria de Fatima, Faria, Sergio M. de, Sprent, Janet I, James, Euan K, Young, J. Peter W
Format: Article
Language:English
Subjects:
biodiversity
Brazil
Burkholderia - classification
Burkholderia - genetics
DNA, Bacterial - genetics
Ecology, environment
Evolution, Molecular
Genes, Bacterial
Genetic diversity
Geography
Legumes
Life Sciences
Microbiology and Parasitology
Mimosa
Mimosa - microbiology
Nitrogen
nitrogen fixation
Phylogeny
Plant ecology
rhizobia
Sequence Alignment
Sequence Analysis, DNA
Species Specificity
Symbiosis
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Summary:Burkholderia has only recently been recognized as a potential nitrogen-fixing symbiont of legumes, but we find that the origins of symbiosis in Burkholderia are much deeper than previously suspected. We sampled 143 symbionts from 47 native species of Mimosa across 1800 km in central Brazil and found that 98% were Burkholderia. Gene sequences defined seven distinct and divergent species complexes within the genus Burkholderia. The symbiosis-related genes formed deep Burkholderia-specific clades, each specific to a species complex, implying that these genes diverged over a long period within Burkholderia without substantial horizontal gene transfer between species complexes.
ISSN:0962-1083
1365-294X
DOI:10.1111/j.1365-294X.2009.04458.x