| Автор | Nainan, Hei |
| Автор | Ping, Yang |
| Автор | Yang, Yang |
| Автор | Jinxiong, Liu |
| Автор | Huijun, Bao |
| Автор | Haili, Liu |
| Автор | Hui, Zhang |
| Автор | Qiusheng, Chen |
| Дата выпуска | 2010 |
| dc.description | SummaryFine structure observations were performed by means of electron microscopy on oogenesis and vitellogenesis and the special functions of follicular cells in the Chinese soft-shelled turtle (Pelodiseus sinensis). Histological examination of the ovary showed a well developed lacunae system containing fine granules, fibres or gelatiniform materials with one or two germinal beds dispersed on the dorsal surface of the ovarian cortex. The process of oogenesis comprised 10 consecutive phases according to the morphology of the yolk platelets, follicular cells and zona pellucida (ZP). Electron microscopy of vitellogenesis revealed some of the mitochondria gradually being transformed into yolk granules. In the advanced stage of vitellogenesis, large amounts of rough endoplasmic reticula, Golgiosomes and other cell organelles that are involved in synthesis and secretion were observed in follicular cells. The ZP was formed by microvilli, thus increasing the absorptive surface of the oocyte and facilitating transport of nutrients from the follicular epithelium to the ooplasm. This study demonstrated that the ovaries of members of the Testudinidae share more features with Archosaurs than with Squamates, indicating that these features were phylogenetically conserved in the Archosauria. The present observations suggest that the accumulation of yolk materials was controlled by the intrinsic and extrinsic pathways as well as by the activity of follicular cells. These results might also support a sibling relationship of the Testudinidae with the Archosauria and not with all extant reptiles. |
| Формат | application.pdf |
| Издатель | Cambridge University Press |
| Копирайт | Copyright © Cambridge University Press 2009 |
| Тема | Microstructure |
| Тема | Oogenesis |
| Тема | Pelodiseus sinensis |
| Тема | Ultrastructure |
| Тема | Vitellogenesis |
| Название | Fine structural observation on the oogenesis and vitellogenesis of the Chinese soft-shelled turtle (Pelodiseus sinensis) |
| Тип | research-article |
| DOI | 10.1017/S0967199409990116 |
| Electronic ISSN | 1469-8730 |
| Print ISSN | 0967-1994 |
| Журнал | Zygote |
| Том | 18 |
| Первая страница | 109 |
| Последняя страница | 120 |
| Аффилиация | Nainan Hei; Nanjing Agricultural University |
| Аффилиация | Ping Yang; Nanjing Agricultural University |
| Аффилиация | Yang Yang; Nanjing Agricultural University |
| Аффилиация | Jinxiong Liu; Nanjing Agricultural University |
| Аффилиация | Huijun Bao; Nanjing Agricultural University |
| Аффилиация | Haili Liu; Nanjing Agricultural University |
| Аффилиация | Hui Zhang; Nanjing Agricultural University |
| Аффилиация | Qiusheng Chen; Nanjing Agricultural University; Nanjing Agricultural University |
| Выпуск | 2 |
