Cusson M, Lucarotti C, Stoltz D, Krell P, Doucet D
Laurentian Forestry Centre, Natural Resources Canada, Canadian Forest Service, Sainte-Foy, Quebec, G1V 4C7, Canada.
J Invertebr Pathol. 1998 Jul;72(1):50-6. doi: 10.1006/jipa.1998.4750.
The calyx epithelium of the campoplegine wasp, Tranosema rostrale, contains typical ichneumonid polydnaviruses (PVs) that display an apparently uncommon association with the egg chorion. The latter structure features fine hair-like projections, longest around the egg's apices. In the lumen of the ovary, T. rostrale virus becomes lodged between these projections and forms a particulate coat around the egg. In the host, Choristoneura fumiferana, projections and associated virions are observed in close contact with basement membranes of fat body and muscle tissues, to which the eggs rapidly become attached following introduction into the host hemocoel. We discuss the implications of this unusual virus-chorion association in terms of immune protection, delivery of virus to specific host tissues, and the evolution of PVs.
长腹茧蜂Tranosema rostrale的萼上皮含有典型的姬蜂多DNA病毒（PVs），这些病毒与卵壳呈现出一种明显不常见的关联。后者的结构具有细小的毛发状突起，在卵的顶端周围最长。在卵巢腔内，Tranosema rostrale病毒滞留在这些突起之间，并在卵周围形成颗粒状包膜。在宿主云杉卷叶蛾中，观察到突起和相关病毒粒子与脂肪体和肌肉组织的基底膜紧密接触，卵被引入宿主血腔后会迅速附着于这些组织。我们从免疫保护、病毒向特定宿主组织的传递以及多DNA病毒的进化等方面讨论了这种不寻常的病毒 - 卵壳关联的意义。
