Bacterial Adaptation to the Host's Diet Is a Key Evolutionary Force Shaping Drosophila-Lactobacillus Symbiosis

Cell Host & Microbe
Maria Elena MartinoFrançois Leulier

Abstract

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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Citations

Dec 24, 2018·Applied and Environmental Microbiology·Mark J MandelKaren Guillemin
Apr 12, 2020·Proceedings of the National Academy of Sciences of the United States of America·Jun Zhou, Michael Boutros
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Datasets Mentioned

BETA
PEGS00000000

Methods Mentioned

BETA
Infection
PCR

Software Mentioned

ImageJ
Geneious
breseq
R script
NIH Image
Leica
PROVEAN ( Protein Variation Effect Analyzer )
Graphpad PRISM

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