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中国圆田螺典型精子及其发生的超微结构研究
Authors
严云志
储玲
谈奇坤
陈士超
Publication date
1 January 2004
Publisher
Abstract
运用光镜和电镜以及细胞化学方法,对中国圆田螺Cipangopaludina chinensis典型精子及其发生的超微结构进行了研究。根据染色质和细胞形态的变化,可将其典型精子发生分为五个时期:精原细胞、初级精母细胞、次级精母细胞、精细胞和成熟精子。精子发生过程中,线粒体逐渐增大,并随着轴的增生而不断发展为螺旋化线粒体系;染色质逐渐凝聚,经过颗粒化和纤维化而终呈均质;随着染色质的变化,细胞核先变小再拉长并螺旋化。精细胞期细胞核基部发生内陷,伴随有中心粒的移人,并向后方形成“9+2”式的轴。成熟典型精子单鞭毛,全长约40μm,包括头、中、尾三段:头段螺旋状,主要由细胞核构成,旋束单股;中段螺旋状,主要由线粒体和轴丝构成,旋束四股;尾段非螺旋状,主要由糖原颗粒和轴丝构成
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Institute of Hydrobiology, Chinese Academy Of Sciences
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Last time updated on 23/01/2021