Grain aphid clones vary in frost resistance, but this trait is not influenced by facultative endosymbionts
Article first published online: 27 OCT 2011
© 2011 The Authors. Ecological Entomology © 2011 The Royal Entomological Society
Volume 36, Issue 6, pages 790–793, December 2011
How to Cite
ŁUKASIK, P., HANCOCK, E. L., FERRARI, J. and GODFRAY, H. C. J. (2011), Grain aphid clones vary in frost resistance, but this trait is not influenced by facultative endosymbionts. Ecological Entomology, 36: 790–793. doi: 10.1111/j.1365-2311.2011.01321.x
- Issue published online: 18 NOV 2011
- Article first published online: 27 OCT 2011
- Accepted 15 August 2011, First published online 27 October 2011
- Acyrthosiphon pisum pea aphid;
- cold hardiness;
- Hamiltonella defensa;
- Regiella insecticola;
- secondary endosymbionts;
- Sitobion avenae grain aphid
1. Facultative endosymbiotic bacteria of insects are known to affect life-history traits of their hosts, and can provide important fitness benefits under certain environmental conditions. While several distinct endosymbiont-induced effects have been reported, there is no data on whether heritable facultative endosymbionts in any species affect their hosts' performance at low temperatures, something that could have a major effect on insect physiology and survival, and thus population structure and distribution.
2. The original facultative endosymbionts were experimentally removed from five clonal genotypes of the grain aphid, Sitobion avenae Fab., which were then exposed to frost.
3. Aphid genotypes differed considerably in survival following the exposure and in fecundity of the survivors. However, the presence of the facultative symbionts had no overall effect on the studied traits.
4. The results suggest that the facultative symbionts have limited effects on the cold hardiness of their grain aphid hosts.