中国水产科学2011，Vol.18Issue(5)：1189-1195,7.DOI:10.3724/SP.J.1118.2011.01189
单环刺螠精巢年周期发育及精子发生
Annual development of testis and spermatogenesis in Urechis unicinctus
摘要
Abstract
We documented the histological structure and annual development of the testis and the process of sper-matogenesis in Urechis unicinctus using light microscopy and transmission electron microscopy. The testis was localized at the end of the body and formed a band. Each end of the testis was connected to the body wall and respiratory gut wall by muscle tissue. The testis was composed of interior connective tissue and spermatogenic cells, including spermatogonia clusters at the periphery of the connective tissue and interior spermatocytes surrounded by connective tissue. Spermatocytes that were clustered at different stages were transported into the coelomic fluid and developed into sperm, which left the cell clusters and entered the nephridia. Based on the histological characteristics of the testis, we divided the annual development into 5 stages: proliferative, growing, mature, release, and resting stages. In addition, we observed spermatogenesis in the testis and coelom using both optical and electron microscopy and documented ultrastructural changes in the nucleolus, acrosome, and sperm tail.关键词
单环刺螠/精巢/年周期发育/精子发生Key words
Urechis unicinctus/ testis/ annual development/ spermatogenesis分类
农业科技引用本文复制引用
王航宁,邵明瑜,张志峰..单环刺螠精巢年周期发育及精子发生[J].中国水产科学,2011,18(5):1189-1195,7.基金项目
国家自然科学基金面上项目(40776074). （40776074）
