title: Conversely to its sibling Drosophila melanogaster, D. simulans overcomes the immunosuppressive effects of the parasitoid Asobara citri.
abstract: The endoparasitoid Asobara citri avoids Drosophila melanogaster immune defenses, thanks to immune suppressive effects. We investigated whether this parasitoid could also circumvent the immune reaction of D. simulans, a sibling species of D. melanogaster. The rates of infestation, successful parasitism, total encapsulation and mortality were measured after complete development of both D. melanogaster and D. simulans larvae parasitized by A. citri. Results showed that the parasitoids were almost never encapsulated in D. melanogaster larvae, while 45% were encapsulated in D. simulans. A. citri induced a targeted disruption of the hematopoietic organs and a decrease of the hemocytes load in host larvae of both species. Despite such disruptive immune effects most D. simulans larvae succeeded in encapsulating A. citri eggs, probably thanks to their ability to immediately mount a capsule after infestation. This work brings some insight into the diversity of the immune potentials evolved by Drosophila species towards parasitoids.
authors.affiliation: Laboratoire de Biologie des Entomophages, Université de Picardie Jules Verne, 33 rue Saint Leu, 80039 Amiens cedex, France.
authors.forename: Sébastien J M
authors.initials: SJ
authors.lastname: Moreau
authors.forename: Sylvain
authors.initials: S
authors.lastname: Guillot
authors.forename: Céline
authors.initials: C
authors.lastname: Populaire
authors.forename: Géraldine
authors.initials: G
authors.lastname: Doury
authors.forename: Geneviève
authors.initials: G
authors.lastname: Prévost
authors.forename: Patrice
authors.initials: P
authors.lastname: Eslin
mesh_terms: D000818:Animals; D004331:Drosophila melanogaster / Q000276:immunology* / Q000469:parasitology*; D006927:Hymenoptera / Q000276:immunology*; D007108:Immune Tolerance / Q000276:immunology*; D007814:Larva / Q000276:immunology