摘要
对北京油葫芦 (TeleogryllusemmaOhmachi&Matsuura )卵子发生过程进行了系统观察和研究 .结果表明 ,成虫期卵子发生可明显的分为卵母细胞分化、生长及卵黄形成三个时期 ,并可分为七个阶段 .第一阶段 ,卵母细胞位于卵原区 ,进行第一次减数分裂的前期 .第二阶段 ,卵母细胞核内核仁消失 ,滤泡上皮细胞开始分化 .第三阶段 ,滤泡上皮细胞有丝分裂形成单细胞层包围在卵母细胞外 ,之后滤泡上皮细胞形成双核的柱状体 .第四阶段 ,卵母细胞胞质的周缘有泡状小体出现 ,随后卵黄小颗粒开始在胞质周缘沉积 .第五阶段 ,卵母细胞积累大量卵黄物质 ,胚泡膜界限变的模糊 .第六阶段 ,卵黄积累完成 ,胚泡消失 ,滤泡上皮细胞又成为扁圆形 .第七阶段 ,卵黄膜和卵壳形成 。
The present paper investigates the oogenesis of Teleogryllus emma Ohmachi and Matsuura. Oogenesis in the adult stage may be divided into 7 stages: 1. Oocytes are located in the germarium and first meiotic division occurs at this stage. 2.Nucledi of nucleus disappears in the oocytes. The follicular cells begin to divide. 3. The oocyte, is surrounded by the follicular cells which form a single-layer and then the follicular cells become columnar shape with two nucleus. 4. The vesicles appear on the edge of cytoplasm and yolk granules begin to deposit in the cytoplasm. 5. Ooplasm is gradually filled up with yolk granules and the membrane of germinal vesicle begin to disappear. 6. Deposition of yolk ends and germinal vesicle completely disappear. 7. As soon as the yolk membrane and egg shell come into being, the oogenesis ends completely.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第4期90-93,共4页
Journal of Shaanxi Normal University：Natural Science Edition
