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当前位置: 首页 > 文章 > 鲂鱼受精早期精子入卵的扫描电子显微镜观察 水产学报 1982,6 (4) 313-320
Position: Home > Articles > THE OBSERVATION ON THE INITIAL FERTILIZATION OF FRESHWATER BREAM BY ELECTRONIC SCANNING MICROSCOPE Journal of Fisheries of China 1982,6 (4) 313-320

鲂鱼受精早期精子入卵的扫描电子显微镜观察

作  者：
王瑞霞;张毓人;傅仓生;李振兰;吴宜章;张福顺;郝宏京
单  位：
上海水产学院
摘  要：
用光学显微镜观察精子进入活卵是相当困难的。作者用扫描电子显微镜初步揭示了鲂鱼受精早期精子入卵的程序,讨论了精子入卵的路径、时间和时限,并初步分析了单精入卵的机制。
译  名：
THE OBSERVATION ON THE INITIAL FERTILIZATION OF FRESHWATER BREAM BY ELECTRONIC SCANNING MICROSCOPE
作  者：
Wang Ruixia;Zhang Yuren;Fu Cansheng;Li Zhonlan;Wu Yizhang,Zhang Fishun;Hao Hongjing Shanghai Fisheries College Institute of Atomic energy University, Chinese Academy of Agricultureal Science
摘  要：
In generally, to make sure of the sperm enter into living egg is considerable dif-ficult. We have got excellent observations by use of the electronic scanning microscope.The results can be summarized as follows: 1. The matured egg of the bream (Megalobrama terminalis Richardson) is surro-unded by the thick chorion. There is a fanel-like depression on the chorion nearbythe animal pole. A micropyle is at the bottom of the depression. A micropylar tube,5μ in diameter, connels the micropyle into the protoplasmic germinal disc. Theacrosomless sperm contact with the egg cytoplasm through this micropylar tube. Inaddition, there are numerous infinitesimal pores are found all over the surface ofchorion. 2. The sperm of the bream enter into the egg instantly, and all micropylar tubesare sealed by the fertilized plug within 30 seconds after insemination, the sperm entersthe egg and cast off the flagellum. 3. Although only one sperm is allowed to enter into the egg normally, but agreat quantity of supernumerary sperms is necessary to raise the rate of fertilization.However, if more than one sperm enters into the egg, the number of chromosomeswill be raised than the normal and cause abortion in early embryogenesis, thus afertilized plug is formed at the inner opening of the micropylar tube.

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