文献类型：期刊文献

中文题名：施氏獭蛤融合卵裂及其胚胎发育过程观察

英文题名：Fusion Cleavage and Observation on the Embryo Development of Lutraria sieboldii Reeve

作者：焦宗垚[1];刘永[2];张春芳[2]

机构：[1]广东省海洋工程职业技术学校,广东广州510320;[2]广东海洋大学珍珠研究所,广东湛江524025

年份：2010

卷号：31

期号：4

起止页码：408

中文期刊名：Zoological Research

外文期刊名：动物学研究（英文）

收录：MEDLINE(收录号：20740703)、CSTPCD、、Scopus、CSCD2011_2012、北大核心2008、北大核心、CSCD、PubMed

语种：中文

中文关键词：施氏獭蛤;胚胎发育;融合卵裂

外文关键词：Lutraria sieboldii Reeve; Embryo development; Fusion cleavage

中文摘要：对施氏獭蛤胚胎发育过程进行了观察,结果显示:(1)与其他双壳类相似,施氏獭蛤胚胎发育过程可以分为卵裂期、囊胚期、原肠期、担轮幼虫期和面盘幼虫期;(2)在卵裂阶段,施氏獭蛤的卵裂方式完全不同于其他动物:施氏獭蛤卵子发育到第一次成熟分裂前期(胚泡破裂前)即有受精能力,但卵子受精后未观察到极体排出的现象,而是有多核受精卵产生;在以后的卵裂过程中,受精卵没有进行其他动物的经裂或纬裂,而是以一种独特的、复杂的分裂方式——融合卵裂进行卵裂,即:二细胞、四细胞、八细胞进行下一次卵裂之前,细胞核逐渐消失,分裂球逐渐融合成一个细胞,一段时间后在细胞中央逐渐出现数量加倍的细胞核,细胞核逐渐向外周移动,最后一次性地分裂出数量加倍的分裂球。

外文摘要：The embryonic development process of Lutraria sieboldii Reeve was observed.The results showed that：（1） Like other bivalves,its embryonic development could be divided into 5 phases：cleavage,blastula,gastrula,trochophore and veliger.（2） In cleavage phase,the cleavage mode for Lutraria sieboldii Reeve was completely different from other animals.Although the ova of L.sieboldii Reeve obtained the ability to fertilize before they developed into the prophase of meiosis I（prior to the breakage of blastocyst）,the release of polar bodies was not observed posterior to fertilization of ova,instead multi-nuclear fertilized ova were found.In later cleavage,longitudinal or latitudinal cleavages with the fertilized eggs did not occur as in other animals.A more unique and intricate type of cleavage,we called it fusion cleavage,was observed,viz.,before 2-cell,4-cell,8-cell blastomeres entered into next division,nuclei disappeared gradually,blastomere fused gradually into one cell.After some time,in the centre of the cell appeared gradually nuclei that had been doubled in number.The nuclei gradually moved outward,and finally number-doubled blastomeres were cleaved out at one time.