Ultrastructure of the sperm of blue sprat, Spratelloides gracilis; Teleostei, Clupeiformes, Clupeidae
Ultrastructure of the sperm of blue sprat, Spratelloides gracilis; Teleostei, Clupeiformes, Clupeidae
复制标题
DOI：
10.1016/j.tice.2006.06.006
复制
发表时间：
2006-10-01
期刊：
影响因子：
2.6
通讯作者：
Chou, Y. -C.
中科院分区：
文献类型：
--
作者：
Gwo, J. -C.;Lin, C. -Y.;Chou, Y. -C.
所研究的鲱类精子的一般结构具有一个橄榄形的头部与一个明显的深核窝，一个中段与一个后鞭毛。它们的特征在于两种无定形：环状或C形的轴丝偶联体的A小管中的ITD（小管内分化）。本文研究了蓝鲱Spatelloides gracilis精子的精细结构，以确定其结果是否符合鲱科分类学的现有假设。成熟精子具有以下特征：（1）核呈橄榄形，其突出的深核窝包围着鞭毛的起始部分，（2）近端中心粒尚未被鉴定，（3）单个球形精子位于鞭毛的侧面，（4）不存在胞质管。我们的蓝鲷精子形态学数据表明，蓝鲷有鲱类的亲和力，而没有密切的亲和力与Elopomorpha。鲱鱼精的形态变化与核和精子是特别可变的。本研究为现有的比较精子学知识提供了有用的系统特征，并可能为真硬骨鱼的生殖提供新的线索。(c)2006爱思唯尔有限公司版权所有。
The general sperm structure of the investigated clupeoids possess an oliviform head with a distinct deep nuclear fossa, a midpiece with one mitochondrion and a posterior flagellum. They are characterized by two apomorphies: an annular or C-shaped mitochondrion and ITDs (intratubular differentiation) in the A tubules of the axonemal doublets. The fine structure of the spermatozoa of blue sprat, Spratelloides gracilis, was investigated to see if resulting data conformed to the current hypotheses of the taxonomy of the Clupeidae. The mature sperm is characterized by the following features: (1) the nucleus is oliviform; its prominent deep nuclear fossa encloses the initial portion of flagellum, (2) a proximal centriole has not been identified, (3) a single spherical mitochondrion is located laterally in relation to the flagellum and (4) no cytoplasmic canal is present. Our blue sprat-spermatozoan morphology data suggest that the blue sprat has Clupeomorpha affinities, while indicating no close affinity with Elopomorpha. Clupeoid sperm exhibit morphological variations with the nucleus and mitochondrion being particularly variable. This study provides useful systematic characters to the existing knowledge of comparative spermatology and may provide additional clue to Euteleost phylogeny. (c) 2006 Elsevier Ltd. All rights reserved.