Rxivist logo

Environmental specificity in Drosophila-bacteria symbiosis affects host developmental plasticity

By Robin Guilhot, antoine rombaut, Anne Xuéreb, Kate Howell, Simon Fellous

Posted 28 Jul 2019
bioRxiv DOI: 10.1101/717702 (published DOI: 10.1007/s10682-020-10068-8)

Environmentally acquired microbial symbionts could contribute to host adaptation to local conditions like vertically transmitted symbionts do. This scenario necessitates symbionts to have different effects in different environments. We investigated this idea in Drosophila melanogaster , a species which communities of bacterial symbionts vary greatly among environments. We isolated four bacterial strains isolated from the feces of a D. melanogaster laboratory strain and tested their effects in two conditions: the ancestral environment (i.e. the laboratory medium) and a new environment (i.e. fresh fruit with live yeast). All bacterial effects on larval and adult traits differed among environments, ranging from very beneficial to marginally deleterious. The joint analysis of larval development speed and adult size further shows bacteria affected developmental plasticity more than resource acquisition. This effect was largely driven by the contrasted effects of the bacteria in each environment. Our study illustrates that understanding D. melanogaster symbiotic interactions in the wild will necessitate working in ecologically realistic conditions. Besides, context-dependent effects of symbionts, and their influence on host developmental plasticity, shed light on how environmentally acquired symbionts may contribute to host evolution.

Download data

  • Downloaded 665 times
  • Download rankings, all-time:
    • Site-wide: 61,642
    • In evolutionary biology: 2,746
  • Year to date:
    • Site-wide: 114,254
  • Since beginning of last month:
    • Site-wide: 114,544

Altmetric data

Downloads over time

Distribution of downloads per paper, site-wide