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Dernière mise à jour : Mai 2018

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Institut Sophia Agrobiotech

UMR INRA - Univ. Nice Sophia Antipolis - Cnrs

http://www.paca.inra.fr/institut-sophia-agrobiotech_eng/

Variability of venom components in immune suppressive parasitoid wasps: From a phylogenetic to a population approach (ESIM Team)

Endoparasitoid wasps develop at the expense of other insects, leading to their death.

To evade or counteract the host immune response, endoparasitoids have evolved different strategies, the most often reported being injection into the host of immunosuppressive factors, notably venom proteins, along with the egg. The analysis of venom components has been performed independently in species of different taxa, but the present picture is far from complete. Intriguingly, the question of the level of venom variability inside species has been neglected, although it may partly determine the potential for parasitoid adaptation. Here, we present a short review of our present knowledge of venom components in endoparasitoids, as well as of the only well-known example of intraspecific variability in a venom immune suppressive protein being responsible for variation in parasitoid virulence. We then present data evidencing inter-individual differences in venom protein profiles, using a gel electrophoresis approach, both in laboratory strains and field populations of two parasitoid species. Whether occurrence of such variability may permit a selection of parasitoid venom components driven by the host remains to be tested, notably in the context of the production and use of biological control auxiliaries.

Graphical abstract illustrating the global gel electrophoresis and specific dot blot approaches for analysing venom proteins from individual parasitoid females.

Graphical abstract illustrating the global gel electrophoresis and specific dot blot approaches for analysing venom proteins from individual parasitoid females.

  • Colinet D, Mathé-Hubert H, Allemand R, Gatti JL, Poirié M: Variability of venom components in immune suppressive parasitoid wasps: From a phylogenetic to a population approach. J Insect Physiol 2013, 59(2):205–212.