Oogenesis in Acerentomon gallicum Jonescu (Protura) |
| |
Authors: | Dr Szczepan Biliński |
| |
Institution: | (1) Department of Zoology, Jagellonian University, Kraków, Poland;(2) Department of Zoology, Jagellonian University, Krupnicza 50, Kraków, Poland |
| |
Abstract: | Summary Late stages of oogenesis in Acerentomon gallicum Jonescu have been studied by means of light and electron microscopy. Each of the two ovaries of this species consists of a single panoistic ovariole. Late previtellogenic and early vitellogenic oocytes are enclosed in an electron opaque layer, the so-called primary sheath. The precursors for this sheath are most likely synthesized by follicle cells. The yolk develops through autosynthesis, with free ribosomes, dictyosomes and lamellar bodies being involved in the process. Mature yolk spheres contain proteins and polysaccharides. Besides the organelles that take part in vitellogenesis, mitochondria and cisternal stacks of the rough endoplasmic reticulum occur in the ooplasm.This work was supported by Government Problem Grant ii-1.3.13 |
| |
Keywords: | Oogenesis Yolk formation Follicle cells Ultrastructure Protura |
本文献已被 SpringerLink 等数据库收录! |
|