Abstract
The chorionic membrane of parasitoid eggs is of particular interest to individuals investigating parasite-host interactions at the cellular level. Results of several studies indicate that the chorionic surface and/or material associated with the latter are of importance in providing protection against the host immune system. The primary objective of the present study was to determine, ultrastructurally the manner in which the vitelline and chorionic membranes of an ichneumonid parasitoid,Campoletis sonorensisare synthesized.The reproductive system ofC. sonorensisconsists of 2 ovaries, each composed of 12 ovarioles. Within the ovarioles developing oocytes are enclosed by a single layer of follicular tissue. Adjacent follicle cells adhere by means of septate desmosomes and gap junctions (Fig.1). During the initial stages of vitellogenesis or yolk deposition each follicle cell is abundantly supplied with non-membrane bound ribosomes, but rough endoplasmic reticulum is sparse.
Published Version
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