DEVELOPMENT OF OVARIOLES AND NURSE CELLS CYTOSKELETON IN CALLIPHORA ERYTHROCEPHALA MG. (DIPTERA; CALLIPHORIDAE)
T. V. Ananina,1 A. E. Vedernikov, A. E. Hodzhanov, V. N. Stegnij
Research Institute of Biology and Biophysics of Tomsk State University;
1 e-mail: center_cu@res.tsu.ru
We have carried out the analysis of ovariole development and morphology in Calliphora erythrocephala Mg. (Diptera: Calliphoridae). It has been shown that several
regions can be distinguished in C. erythrocephala germarium. In these regions cyst morphogenesis goes on stage by stage right up to the separation of formed egg
chamber. There are fusomes of different degree of branching in germarium. Two egg chambers develop in C. erythrocephala vitellarium. We have researched distribution
of actin filaments and ring canals formation in the nurse cells of C. erythrocephala. Diameter of ring canals increases from 1.5 ìm in germarium zone to 14.7 ìm at 3
and 4 stadies oogenesis. We suggest the scheme that illustrates irregular stretching of actin rollers which are formed during middle and late oogenesis around the ring canals
joining proximal, sharply increased in size nurse cells with neighboring nurse cells.
Key words: actin cytoskeleton of nurse cells, ring canals, polytrophic ovarioles, fusome, Calliphora erythrocephala
| Pdf |
Back |
Contents |
Main |
