Ultrastructure of the female reproductive apparatus of the egg parasitoid Gryon pennsylvanicum (Ashmead) (Hymenoptera,Platygastridae) |
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| Affiliation: | 1. Department of Agricultural Biology, Seoul National University, Seoul 08826, Republic of Korea;2. Ilsong Institute of Life Science, Hallym University, Anyang, Gyeonggi-do 14066, Republic of Korea;3. Department of Obstetrics and Gynecology, Hallym University Sacred Heart Hospital, Anyang, Gyeonggi-do 14066, Republic of Korea;4. National Institute of Biological Resources, Environmental Research Complex, Incheon 22689, Republic of Korea;5. Department of Biomedical Gerontology, Hallym University, Chuncheon, 24252, Gangwondo, Republic of Korea;6. Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea |
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| Abstract: | The growing interest in Leptoglossus occidentalis, the conifer seed bug pest accidentally introduced into Europe in the 1990s, led us to investigate the female reproductive structures of the hymenopteran platygastrid Gryon pennsylvanicum, which is its candidate antagonist for biological control programmes. Our study revealed a genital apparatus with some characteristic features, such as an unusual length of the oviduct (divided into a long proximal and a short distal tract), the absence of accessory glands and the presence of a spermatheca provided with a small spermathecal gland. The ultrastructural investigation revealed that the shorter part of the common oviduct is involved in ion uptake whereas the longer part has two cell types with secretory function: the former with dense bodies and the latter with granular particles. The secretory contents of both are released into the oviduct lumen. The granular particles are formed in a complex of modified endoplasmic reticulum and appear as virus-like particles. |
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| Keywords: | Insect female genital system Egg parasitoid Insect oviduct secretory activity Spermathecal gland Virus-like particles |
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