Ultrastructure of spermiogenesis and the spermatozoon of Opecoeloides furcatus (Trematoda, Digenea, Opecoelidae), a parasite of Mullus barbatus (Pisces, Teleostei)
Ultrastructure of spermiogenesis and the spermatozoon of Opecoeloides furcatus (Trematoda, Digenea, Opecoelidae), a parasite of Mullus barbatus (Pisces, Teleostei)
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DOI：
10.1007/s004360050047
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发表时间：
2000-04-01
影响因子：
2
通讯作者：
Marchand, B
中科院分区：
文献类型：
--
作者：
Miquel, J;Nourrisson, C;Marchand, B
本文用透射电子显微镜观察了短尾轮虫的精子发生和成熟精子的形态。这种吸虫的精子发生符合双基因吸虫的一般模式。分化带内有与两个中心粒和一个中心粒间小体相关的条纹状根状突起。两个鞭毛的旋转和它们的近远端与中间的细胞质突起的融合也是呋喃地鼠精子发生的特征。然而，据报道，两个鞭毛的近端远端融合是不同步的。呋喃地鼠的成熟精子呈丝状，两端呈锥形，具有Dienea配子的所有特征：两个鞭毛、线粒体、核和两束平行的皮质微管。尽管如此，还是有几个特性可以将毛囊吸虫的成熟精子与其他双基因吸虫的配子区分开来。
Spermiogenesis and mature spermatozoa of Opecoeloides furcatus (Digenea, Opecoelidae) are described by means of transmission electron microscopy. Spermiogenesis in this fluke matches the general pattern of digenetic trematodes. Striated rootlets associated with the two centrioles and an intercentriolar body are present in the differentiation zone. Flagellar rotation of two flagella and their proximodistal fusion with a median cytoplasmic process also characterize the spermiogenesis of O. furcatus. Nevertheless, asynchronicity is reported for the proximodistal fusion of the two flagella. Mature spermatozoa of O. furcatus are filiform, tapering at both ends and they present all the characteristic features found in the Digenea gamete: two flagella, mitochondrion, nucleus and two bundles of parallel cortical microtubules. Nevertheless several peculiarities distinguish the mature spermatozoon of O. furcatus from the gamete of other digenetic trematodes.