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

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,...

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Main Authors: Anne Duplouy, Robin Pranter, Haydon Warren-Gash, Robert Tropek, Niklas Wahlberg
Format: Article
Language:English
Published: BMC 2020-10-01
Series:BMC Microbiology
Subjects:
Online Access:http://link.springer.com/article/10.1186/s12866-020-02011-2
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author Anne Duplouy
Robin Pranter
Haydon Warren-Gash
Robert Tropek
Niklas Wahlberg
author_facet Anne Duplouy
Robin Pranter
Haydon Warren-Gash
Robert Tropek
Niklas Wahlberg
author_sort Anne Duplouy
collection DOAJ
description 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 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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spelling doaj.art-466b0af70a384dff8db90b6bf58d1ace2022-12-21T23:46:09ZengBMCBMC Microbiology1471-21802020-10-012011910.1186/s12866-020-02011-2Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the AfrotropicsAnne Duplouy0Robin Pranter1Haydon Warren-Gash2Robert Tropek3Niklas Wahlberg4Department of Biology, Lund UniversityDepartment of Biology, Lund UniversityOverstrand Mansions, Prince of Wales DriveDepartment of Ecology, Faculty of Science, Charles UniversityDepartment of Biology, Lund UniversityAbstract 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.http://link.springer.com/article/10.1186/s12866-020-02011-2SymbiosisVertical transmissionHorizontal transferPhylogenyLepidopteraInterspecific interactions
spellingShingle Anne Duplouy
Robin Pranter
Haydon Warren-Gash
Robert Tropek
Niklas Wahlberg
Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics
BMC Microbiology
Symbiosis
Vertical transmission
Horizontal transfer
Phylogeny
Lepidoptera
Interspecific interactions
title Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics
title_full Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics
title_fullStr Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics
title_full_unstemmed Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics
title_short Towards unravelling Wolbachia global exchange: a contribution from the Bicyclus and Mylothris butterflies in the Afrotropics
title_sort towards unravelling wolbachia global exchange a contribution from the bicyclus and mylothris butterflies in the afrotropics
topic Symbiosis
Vertical transmission
Horizontal transfer
Phylogeny
Lepidoptera
Interspecific interactions
url http://link.springer.com/article/10.1186/s12866-020-02011-2
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