Complex host-pathogen coevolution in the Apterostigma fungus-growing ant-microbe symbiosis |
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| Authors: | Nicole M Gerardo Ulrich G Mueller Cameron R Currie |
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| Institution: | (1) Section of Integrative Biology, University of Texas at Austin, Austin, TX, USA;(2) Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Republic of Panama;(3) Department of Ecology and Evolutionary Biology, University of Arizona, P.O. Box 210088, Tucson, AZ, USA;(4) Department of Bacteriology, University of Wisconsin at Madison, Madison, WI, USA |
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| Abstract: | Background The fungus-growing ant-microbe symbiosis consists of coevolving microbial mutualists and pathogens. The diverse fungal lineages
that these ants cultivate are attacked by parasitic microfungi of the genus Escovopsis. Previous molecular analyses have demonstrated strong phylogenetic congruence between the ants, the ants-cultivated fungi
and the garden pathogen Escovopsis at ancient phylogenetic levels, suggesting coevolution of these symbionts. However, few studies have explored cophylogenetic
patterns between these symbionts at the recent phylogenetic levels necessary to address whether these parasites are occasionally
switching to novel hosts or whether they are diversifying with their hosts as a consequence of long-term host fidelity. |
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