ULTRASTRUCTURAL-STUDY ON THE SPERMIOGENESIS AND SPERMATOZOON OF THE METACERCARIAE OF MICROPHALLUS-PRIMAS (DIGENEA), A PARASITE OF CARCINUS-MAENAS
ULTRASTRUCTURAL-STUDY ON THE SPERMIOGENESIS AND SPERMATOZOON OF THE METACERCARIAE OF MICROPHALLUS-PRIMAS (DIGENEA), A PARASITE OF CARCINUS-MAENAS
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DOI：
10.1002/mrd.1080250206
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发表时间：
1990-02-01
影响因子：
2.5
通讯作者：
BARANDELA, T
中科院分区：
文献类型：
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作者：
CASTILHO, F;BARANDELA, T
用电子显微镜观察了蟹类寄生虫小的线状精子。对精子头部区域的调查揭示了扁形蠕虫精子的三个迄今未知的特征。第一种是核在两个轴突之一内的异常包涵体，局限于头端区。第二种是9+0(没有动力蛋白臂的双胞体)和9+“1”两种模式在同一轴丝中共存。第三种是存在一层皮质微管，从核从轴丝到尾部(两个鞭毛开始的地方)的区域纵向延伸。精子发生的顺序与大多数双胞虫吸虫的描述相似，精子发生过程几乎在整个群体中遵循共同的计划。
The thread-like spermatozoon of the crab parasite Microphallus primas was studied by electron microscopy. A survey of the head region of the spermatozoon reveals three features hitherto unknown in Platyhelminthes spermatozoa. The first is the aberrant inclusion of the nucleus within one of the two axonemes, limited to the head end region. The second is the coexistence, in the same axoneme, of two patterns, 9 + 0 (doublets without dynein arms) and 9 + "1". The third is the presence of a layer of cortical microtubules running longitudinally from the zone where the nucleus goes from axoneme to the tail region (where the two flagella start). The sequence of events in spermatogenesis is similar to that described for most of the Digenea trematodes, and the spermiogenesis process conforms to a common plan in nearly the whole group.