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Towards unravelling Wolbachia global exchange : a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics

Duplouy, Anne LU ; Pranter, Robin LU orcid ; Warren-Gash, Haydon ; Tropek, Robert and Wahlberg, Niklas LU (2020) In BMC Microbiology 20(1).
Abstract

Background: Phylogenetically closely related strains of maternally inherited endosymbiotic bacteria are often found in phylogenetically divergent, and geographically distant insect host species. The interspecies transfer of the symbiont Wolbachia has been thought to have occurred repeatedly, facilitating its observed global pandemic. Few ecological interactions have been proposed as potential routes for the horizontal transfer of Wolbachia within natural insect communities. These routes are however likely to act only at the local scale, but how they may support the global distribution of some Wolbachia strains remains unclear. Results: Here, we characterize the Wolbachia diversity in butterflies from the tropical forest regions of... (More)

Background: Phylogenetically closely related strains of maternally inherited endosymbiotic bacteria are often found in phylogenetically divergent, and geographically distant insect host species. The interspecies transfer of the symbiont Wolbachia has been thought to have occurred repeatedly, facilitating its observed global pandemic. Few ecological interactions have been proposed as potential routes for the horizontal transfer of Wolbachia within natural insect communities. These routes are however likely to act only at the local scale, but how they may support the global distribution of some Wolbachia strains remains unclear. Results: Here, we characterize the Wolbachia diversity in butterflies from the tropical forest regions of central Africa to discuss transfer at both local and global scales. We show that numerous species from both the Mylothris (family Pieridae) and Bicyclus (family Nymphalidae) butterfly genera are infected with similar Wolbachia strains, despite only minor interclade contacts across the life cycles of the species within their partially overlapping ecological niches. The phylogenetic distance and differences in resource use between these genera rule out the role of ancestry, hybridization, and shared host-plants in the interspecies transfer of the symbiont. Furthermore, we could not identify any shared ecological factors to explain the presence of the strains in other arthropod species from other habitats, or even ecoregions. Conclusion: Only the systematic surveys of the Wolbachia strains from entire species communities may offer the material currently lacking for understanding how Wolbachia may transfer between highly different and unrelated hosts, as well as across environmental scales.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Horizontal transfer, Interspecific interactions, Lepidoptera, Phylogeny, Symbiosis, Vertical transmission
in
BMC Microbiology
volume
20
issue
1
article number
319
publisher
BioMed Central (BMC)
external identifiers
  • scopus:85092905697
  • pmid:33081703
ISSN
1471-2180
DOI
10.1186/s12866-020-02011-2
language
English
LU publication?
yes
id
15bdf82b-b2ea-4e58-bf9f-cbd370286ea9
date added to LUP
2020-11-04 14:30:52
date last changed
2024-05-29 22:22:11
@article{15bdf82b-b2ea-4e58-bf9f-cbd370286ea9,
  abstract     = {{<p>Background: Phylogenetically closely related strains of maternally inherited endosymbiotic bacteria are often found in phylogenetically divergent, and geographically distant insect host species. The interspecies transfer of the symbiont Wolbachia has been thought to have occurred repeatedly, facilitating its observed global pandemic. Few ecological interactions have been proposed as potential routes for the horizontal transfer of Wolbachia within natural insect communities. These routes are however likely to act only at the local scale, but how they may support the global distribution of some Wolbachia strains remains unclear. Results: Here, we characterize the Wolbachia diversity in butterflies from the tropical forest regions of central Africa to discuss transfer at both local and global scales. We show that numerous species from both the Mylothris (family Pieridae) and Bicyclus (family Nymphalidae) butterfly genera are infected with similar Wolbachia strains, despite only minor interclade contacts across the life cycles of the species within their partially overlapping ecological niches. The phylogenetic distance and differences in resource use between these genera rule out the role of ancestry, hybridization, and shared host-plants in the interspecies transfer of the symbiont. Furthermore, we could not identify any shared ecological factors to explain the presence of the strains in other arthropod species from other habitats, or even ecoregions. Conclusion: Only the systematic surveys of the Wolbachia strains from entire species communities may offer the material currently lacking for understanding how Wolbachia may transfer between highly different and unrelated hosts, as well as across environmental scales.</p>}},
  author       = {{Duplouy, Anne and Pranter, Robin and Warren-Gash, Haydon and Tropek, Robert and Wahlberg, Niklas}},
  issn         = {{1471-2180}},
  keywords     = {{Horizontal transfer; Interspecific interactions; Lepidoptera; Phylogeny; Symbiosis; Vertical transmission}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{BioMed Central (BMC)}},
  series       = {{BMC Microbiology}},
  title        = {{Towards unravelling Wolbachia global exchange : a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics}},
  url          = {{http://dx.doi.org/10.1186/s12866-020-02011-2}},
  doi          = {{10.1186/s12866-020-02011-2}},
  volume       = {{20}},
  year         = {{2020}},
}