袋熊和树袋熊（亚目：袋熊目）精子头部成分的结构组织：有袋类动物中的一个谜。
The structural organisation of sperm head components of the wombat and koala (suborder: Vombatiformes): an enigma amongst marsupials.
作者信息
Breed W G, Leigh C M, Ricci M
机构信息
Department of Anatomical Sciences, University of Adelaide, SA, Australia.
出版信息
J Anat. 2001 Jan;198(Pt 1):57-66. doi: 10.1046/j.1469-7580.2001.19810057.x.
Abstract
The sperm head structural organisation of the koala and hairy-nosed wombat, and the effects of varying concentrations of the ionic detergent, Triton X-100, on its component parts, were determined by electron microscopy. Although alike in form between the 2 species, the sperm nucleus of the former, but not the latter, had nuclear vacuoles and appeared to be more easily dispersed by the Triton X-100. The structure of the acrosome of the spermatozoon was similar between the 2 species and, in both, previously undescribed thin posterior and lateral segments were found to be present. It is suggested that this thin segment may facilitate sperm-zona and/or sperm-oolemma binding and fusion.
摘要
通过电子显微镜确定了考拉和毛鼻袋熊的精子头部结构组织，以及不同浓度的离子去污剂Triton X-100对其组成部分的影响。尽管这两个物种的精子形态相似，但前者的精子细胞核有核泡，而后者没有，并且前者的精子细胞核似乎更容易被Triton X-100分散。两种动物精子顶体的结构相似，并且在两者中都发现存在以前未描述过的薄的后部和侧部片段。有人认为，这个薄片段可能有助于精子与透明带和/或精子与卵膜的结合及融合。
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