Journal
CELL HOST & MICROBE
Volume 24, Issue 1, Pages 109-+Publisher
CELL PRESS
DOI: 10.1016/j.chom.2018.06.001
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Funding
- ERC starting grant (FP7) [309704]
- European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant [659510]
- FINOVI foundation
- EMBO Young Investigator Program
- National Science Foundation [MCB-1452902]
- Marie Curie Actions (MSCA) [659510] Funding Source: Marie Curie Actions (MSCA)
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Animal-microbe facultative symbioses play a fundamental role in ecosystem and organismal health. Yet, due to the flexible nature of their association, the selection pressures that act on animals and their facultative symbionts remain elusive. Here we apply experimental evolution to Drosophila melanogaster associated with its growth-promoting symbiont Lactobacillus plantarum, representing a well-established model of facultative symbiosis. We find that the diet of the host, rather than the host itself, is a predominant driving force in the evolution of this symbiosis. Furthermore, we identify a mechanism resulting from the bacterium's adaptation to the diet, which confers growth benefits to the colonized host. Our study reveals that bacterial adaptation to the host's diet may be the foremost step in determining the evolutionary course of a facultative animal-microbe symbiosis.
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