Publication Type: | Journal Article |
Year of Publication: | 2004 |
Authors: | M. Zelazowska, Jaglarz M. K. |
Journal: | Arthropod Structure and Development |
Volume: | 33 |
Issue: | 2 |
Pagination: | 161 - 172 |
Date Published: | 2004 |
Keywords: | Nuclear bodies; Nucleolus; Karyosome; Accessory nuclei; Insect ultrastructure |
Abstract: | We characterize morphological and histochemical changes occurring within the oocyte nucleus (germinal vesicle) during oogenesis in two phthirapteran species: the pig louse, Haematopinus suis (Anoplura) and the pigeon louse, Columbicola columbae (Mallophaga). In previtellogenic oocytes, within the oocyte nucleus the chromatin condenses and forms the karyosome. In contact with the karyosome numerous dense and highly heterogeneous nuclear bodies occur. We demonstrate that these nuclear inclusions have complex structure and contain RNA and argyrophilic proteins of nucleolar organizer (Ag-NOR proteins). Results of immunogold electron microscopy experiments are also presented. The obtained results suggest that the phthirapteran nuclear bodies are assemblages of ribonucleoproteins that are stored in the oocyte nucleus and might be utilized during early stages of embryonic development. |
URL: | https://www.sciencedirect.com/science/article/pii/S1467803904000027 |
DOI: | 10.1016/j.asd.2004.01.001 |
Oogenesis in phthirapterans (Insecta: Phthiraptera). 1. Morphological and histochemical characterization of the oocyte nucleus and its inclusions
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