Interaction specificity between leaf-cutting ants and vertically transmitted Pseudonocardia bacteria

Show simple item record Andersen, Sandra B. Yek, Sze Huei Nash, David R. Boomsma, Jacobus J. 2015-03-23T11:59:46Z 2015-03-23T11:59:46Z 2015
dc.description.abstract BACKGROUND : The obligate mutualism between fungus-growing ants and microbial symbionts offers excellent opportunities to study the specificity and stability of multi-species interactions. In addition to cultivating fungus gardens, these ants have domesticated actinomycete bacteria to defend gardens against the fungal parasite Escovopsis and possibly other pathogens. Panamanian Acromyrmex echinatior leaf-cutting ants primarily associate with actinomycetes of the genus Pseudonocardia. Colonies are inoculated with one of two vertically transmitted phylotypes (Ps1 or Ps2), and maintain the same phylotype over their lifetime. We performed a cross-fostering experiment to test whether co-adaptations between ants and bacterial phylotypes have evolved, and how this affects bacterial growth and ant prophylactic behavior after infection with Escovopsis. RESULTS : We show that Pseudonocardia readily colonized ants irrespective of their colony of origin, but that the Ps2 phylotype, which was previously shown to be better able to maintain its monocultural integrity after workers became foragers than Ps1, reached a higher final cover when grown on its native host than on alternative hosts. The frequencies of major grooming and weeding behaviors co-varied with symbiont/host combinations, showing that ant behavior also was affected when cuticular actinomycete phylotypes were swapped. CONCLUSION : These results show that the interactions between leaf-cutting ants and Pseudonocardia bear signatures of mutual co-adaptation within a single ant population. en_ZA
dc.description.librarian hb2015 en_ZA
dc.description.uri en_ZA
dc.identifier.citation Andersen, SB, Yek, SH, Nash, DR & Boomsma, JJ 2015, 'Interaction specificity between leaf-cutting ants and vertically transmitted Pseudonocardia bacteria', BMC Evolutionary Biology, vol. 15, no. 1, Art. #27, pp. 1-13. en_ZA
dc.identifier.issn 1471-2148
dc.identifier.other 10.1186/s12862-015-0308-2
dc.language.iso en en_ZA
dc.publisher BioMed Central en_ZA
dc.rights © 2015 Andersen et al ; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.orglicenses/by/4.0). en_ZA
dc.subject Attine ant mutualism en_ZA
dc.subject Cross-fostering en_ZA
dc.subject Prophylactic defences en_ZA
dc.subject Host-symbiont coevolution en_ZA
dc.title Interaction specificity between leaf-cutting ants and vertically transmitted Pseudonocardia bacteria en_ZA
dc.type Article en_ZA

Files in this item

This item appears in the following Collection(s)

Show simple item record