Anan'ina Tatjana V, Kokhanenko Alina A, Stegniy Vladimir N
Scientific Research Institute of Biology and Biophysics Tomsk State University, 36 Lenin Prospekt, Tomsk, 634050, Russian Federation,
Protoplasma. 2014 Jul;251(4):913-9. doi: 10.1007/s00709-013-0593-9. Epub 2013 Dec 7.
In the germarium of polytrophic ovarioles of Calliphora erythrocephala (Mg.) fly, four mitotic divisions of cystoblasts give rise to 16-cell germ-line cysts. One cell differentiates into an oocyte, while the remaining 15 cells become nurse cells. Concomitantly actin-rich ring canals are formed at the intercellular junctions. The present study considers a mutual arrangement of the ring canals formed after the second to fourth mitoses relative to the ring canal formed after the first mitotic division in different regions of the germarium and egg chambers. During the cyst formation and its movement to the posterior end of the germarium, the ring canals are displaced relative to one another, thereby giving different branching variants of the cyst. The pattern of cell interconnections becomes stable in germarium region 2b and does not change during the cyst movement along the ovariole despite the cyst polarizes and increases in size.
在红头丽蝇（Calliphora erythrocephala (Mg.)）多滋卵巢管的生殖区，成囊母细胞的四次有丝分裂产生了16细胞的种系囊肿。其中一个细胞分化为卵母细胞，其余15个细胞成为滋养细胞。与此同时，富含肌动蛋白的环管在细胞间连接处形成。本研究考察了在生殖区和卵室的不同区域，第二次至第四次有丝分裂后形成的环管相对于第一次有丝分裂后形成的环管的相互排列。在囊肿形成并向生殖区后端移动的过程中，环管彼此相对移位，从而产生囊肿的不同分支变体。细胞间连接模式在生殖区2b变得稳定，并且在囊肿沿卵巢管移动期间不会改变，尽管囊肿会极化并增大尺寸。
