Skip to main content
Log in

Transmission modes of a pesticide-degrading symbiont of the oriental fruit fly Bactrocera dorsalis (Hendel)

  • Applied microbial and cell physiology
  • Published:
Applied Microbiology and Biotechnology Aims and scope Submit manuscript

Abstract

Symbionts are associated with many insects and play several multifunctional roles in insect-microorganism mutualistic relationships. The trichlorphon-degrading symbiont Citrobacter freundii (CF-BD) of the oriental fruit fly Bactrocera dorsalis was recently discovered; however, its intraspecies transmission pathway among flies remains unknown. Here, we use fluorescence in situ hybridization (FISH), PCR detection, and a series of ingenious experiments to reveal that CF-BD was aggregated in rectal pads associated with the female ovipositor, and the CF-BD symbiont was vertically transmitted via egg surface contamination. Although CF-BD was not detected in ovaries, it was found in deposited eggs. In addition, CF-BD was readily acquired horizontally between larvae or adults via oral uptake, although it was not transferred via mating behavior. Surface sterilization of eggs had a negative effect on the insects, which exhibited a lower body weight and a sharp decrease in fecundity, suggesting important biological roles of CF-BD in the fitness of the host insects. Our findings may also help to explain the high pesticide resistance levels of B. dorsalis. Furthermore, identifying a clear transmission pathway of this organophosphorus-degrading symbiont will be useful for pesticide resistance management and future pest control technologies.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7

Similar content being viewed by others

References

Download references

Funding

This study was supported by the National Key Research and Development Project (2016YC1201200). The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Author information

Authors and Affiliations

Authors

Corresponding authors

Correspondence to Guangwen Liang or Yijuan Xu.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical statement

This article does not involve any studies with human participants performed by any of the authors.

Electronic supplementary material

ESM 1

(PDF 456 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Guo, Z., Lu, Y., Yang, F. et al. Transmission modes of a pesticide-degrading symbiont of the oriental fruit fly Bactrocera dorsalis (Hendel). Appl Microbiol Biotechnol 101, 8543–8556 (2017). https://doi.org/10.1007/s00253-017-8551-7

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00253-017-8551-7

Keywords

Navigation