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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Evidence of diversity and recombination in Arsenophonus symbionts of the Bemisia tabaci species complex
BMC Microbiology, Volume 12, No. SUPPL. 1, Article S10, Year 2012
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Description
Background: Maternally inherited bacterial symbionts infecting arthropods have major implications on host ecology and evolution. Among them, the genus Arsenophonus is particularly characterized by a large host spectrum and a wide range of symbiotic relationships (from mutualism to parasitism), making it a good model to study the evolution of host-symbiont associations. However, few data are available on the diversity and distribution of Arsenophonus within host lineages. Here, we propose a survey on Arsenophonus diversity in whitefly species (Hemiptera), in particular the Bemisia tabaci species complex. This polyphagous insect pest is composed of genetic groups that differ in many ecological aspects. They harbor specific bacterial communities, among them several lineages of Arsenophonus, enabling a study of the evolutionary history of these bacteria at a fine host taxonomic level, in association to host geographical range and ecology. Results: Among 152 individuals, our analysis identified 19 allelic profiles and 6 phylogenetic groups, demonstrating this bacterium's high diversity. These groups, based on Arsenophonus phylogeny, correlated with B. tabaci genetic groups with two exceptions reflecting horizontal transfers. None of three genes analyzed provided evidence of intragenic recombination, but intergenic recombination events were detected. A mutation inducing a STOP codon on one gene in a strain infecting one B. tabaci genetic group was also found. Phylogenetic analyses of the three concatenated loci revealed the existence of two clades of Arsenophonus. One, composed of strains found in other Hemiptera, could be the ancestral clade in whiteflies. The other, which regroups strains found in Hymenoptera and Diptera, may have been acquired more recently by whiteflies through lateral transfers. Conclusions: This analysis of the genus Arsenophonus revealed a diversity within the B. tabaci species complex which resembles that reported on the larger scale of insect taxonomy. We also provide evidence for recombination events within the Arsenophonus genome and horizontal transmission of strains among insect taxa. This work provides further insight into the evolution of the Arsenophonus genome, the infection dynamics of this bacterium and its influence on its insect host's ecology. © 2012 Mouton et al; licensee BioMed Central Ltd.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC3287507/bin/1471-2180-12-S1-S10-S1.pdf
Authors & Co-Authors
Mouton, Laurence
France, Villeurbanne
Université Claude Bernard Lyon 1
Thierry, M.
France, Saint-denis
Peuplements Végétaux et Bioagresseurs en Milieu Tropical Pvbmt
Henri, Hélène
France, Villeurbanne
Université Claude Bernard Lyon 1
Baudin, Rémy
France, Saint-denis
Peuplements Végétaux et Bioagresseurs en Milieu Tropical Pvbmt
Gnankiné, Olivier
Burkina Faso, Ouagadougou
University of Ouagadougou
Reynaud, Bernard
France, Saint-denis
Peuplements Végétaux et Bioagresseurs en Milieu Tropical Pvbmt
Zchori-Fein, Einat
Israel, Bet Dagan
Agricultural Research Organization of Israel
Becker, Nathalie
France, Paris
Museum National D'histoire Naturelle
Fleury, Frédéric
France, Villeurbanne
Université Claude Bernard Lyon 1
Delatte, Hélène
France, Saint-denis
Peuplements Végétaux et Bioagresseurs en Milieu Tropical Pvbmt
Statistics
Citations: 67
Authors: 10
Affiliations: 5
Identifiers
Doi:
10.1186/1471-2180-12-S1-S10
Research Areas
Cancer
Genetics And Genomics
Study Design
Cross Sectional Study
Study Approach
Quantitative