Ultrastructural studies on the development of primary oocytes and vitellogenesis of Tegillarca granosa
泥蚶初级卵母细胞发育及卵黄发生的超微结构研究

The ultrastructural features of the oogenesis and the formation of yolk granules of Tegillarca granosa are using transmission electron microscope. The primary oocyte developmental process is divided into three stages: previtellogenic stage, vitellogenic stage and postvitellogenic stage. Mitochondria, golgi complex, rough endoplasmic reticulum and micro-pinocytosis bubble all participate in the formation of yolk granules and the rough endoplasmic reticulum and mitochondria are key organelles in this process. The heterosynthetic process is the main form of oogenesis, and the exogenous nutrients are mainly from the digestive gland.