| 单环刺螠精巢年周期发育及精子发生 |
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| 引用本文： | 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. |
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| 作者姓名： | 王航宁 邵明瑜 张志峰 |
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| 作者单位： | 海洋生物遗传育种教育部重点实验室中国海洋大学; |
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| 基金项目： | 国家自然科学基金面上项目(40776074) |
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| 摘 要： | 采用组织学方法观察了单环刺螠(Urechis unicinctus)精巢的形态结构及其年周期发育,并利用超微技术观察了精子的发生过程。结果表明,单环刺螠的精巢呈条带状,位于虫体尾部,两端通过肌束分别与呼吸肠管壁外侧和体壁内侧相连。精巢由生精细胞团与结缔组织组成,结缔组织位于精巢中央,精原细胞团分布于结缔组织外周,精母细胞团散布于结缔组织内,各级精母细胞脱离精巢落入体腔液中,历经精母细胞、精细胞,最后形成精子脱离细胞团进入肾管。根据精巢的组织学特征,将单环刺螠的精巢年周期发育划分为增殖期、生长期、成熟期、排放期和休止期5个时期。光镜和电镜下观察了精巢和体腔液中精子发生各时期的结构变化,包括细胞核形态的变化、顶体发生以及尾部的形成。本研究揭示了单环刺螠的精巢发育特点、精子发生历经的场所和分化特征。
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| 关 键 词： | 单环刺螠 精巢 年周期发育 精子发生 |
| 修稿时间： | 2011/10/8 0:00:00 |
Annual development of testis and spermatogenesis in Urechis unicinctus |
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| WANG Hangning,SHAO Mingyu,ZHANG Zhifeng.Annual development of testis and spermatogenesis in Urechis unicinctus[J].Journal of Fishery Sciences of China,2011,18(5):1189-1195. |
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| Authors: | WANG Hangning SHAO Mingyu ZHANG Zhifeng |
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| Institution: | WANG Hangning,SHAO Mingyu,ZHANG Zhifeng Key Laboratory of Marine Genetics and Breeding of Ministry of Education,Ocean University of China,Qingdao 266003,China |
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| 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 res-piratory 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 ... |
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| Keywords: | Urechis unicinctus testis annual development spermatogenesis |
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