Skip to Main content Skip to Navigation
Journal articles

Adaptive variation of buchnera endosymbiont density in aphid host acyrthosiphon pisum controlled by environmental conditions

Abstract : The scarcity of transcriptional regulatory genes in Buchnera aphidicola, an obligate endosymbiont in aphids, suggests the stability of expressed gene patterns and metabolic pathways. This observation argues in favor of the hypothesis that this endosymbiont bacteria might contribute little to the host adaptation when aphid hosts are facing challenging fluctuating environment. Finding evidence for the increased expression or silenced genes involved in metabolic pathways under the pressure of stress conditions and/or a given environment has been challenging for experimenters with this bacterial symbiotic model. Transcriptomic data have shown that Buchnera gene expression changes are confined to a narrow range when the aphids face brutal environmental variations. In this report, we demonstrate that instead of manipulating individual genes, the conditions may act on the relative mass of endosymbiont corresponding to the needs of the host. The control of the fluctuating number of endosymbiont cells per individual host appears to be an unexpected regulatory modality that contributes to the adaptation of aphids to their environment. This feature may account for the success of the symbiotic advantages in overcoming the drastic changes in temperature and food supplies during evolution.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-03296049
Contributor : Sabine Julien <>
Submitted on : Thursday, July 22, 2021 - 3:31:16 PM
Last modification on : Wednesday, September 22, 2021 - 8:54:54 AM

File

neiers_2021_in_press_acs_omega...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Fabrice Neiers, Jean-Michel Saliou, Loïc Briand, Alain Robichon. Adaptive variation of buchnera endosymbiont density in aphid host acyrthosiphon pisum controlled by environmental conditions. ACS Omega, ACS Publications, 2021, 6 (28), pp.17902-17914. ⟨10.1021/acsomega.1c01465⟩. ⟨hal-03296049⟩

Share

Metrics

Record views

24

Files downloads

62