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关于刚毛虫肠道连接复合体的进一步研究。褶状分隔连接的冷冻蚀刻。

Further studies on the junctional complex in the intestine of Sagitta setosa. Freeze-fracture of the pleated septate junction.

作者信息

Duvert M, Gros D

出版信息

Cell Tissue Res. 1982;225(3):663-71. doi: 10.1007/BF00214811.

Abstract

The intramembrane structures of the pleated septate junction which occur in the junctional complex of the intestine of the chaetognath Sagitta setosa have been investigated. The pleated septate junction is made up of linear rows of irregularly shaped and sized particles, often fused into short rods, and pits which can be fused into furrows. The distribution of these structures on E and P faces depends upon the preparative methods used. Many of the morphological characteristics are the same as those of the "lower invertebrate pleated septate junction type" defined by Green (1981 a). The physiological significance of this junction is obscure. On the basis of the presence of septate junctions (both of the paired septate junction and pleated septate junction types) which have mainly morphological characteristics of the "lower invertebrate pleated septate junction" we can add to the hypothesis that chaetognaths are not related to the molluscs and arthropods.

摘要

对箭虫(Sagitta setosa)肠道连接复合体中出现的褶皱分隔连接的膜内结构进行了研究。褶皱分隔连接由形状和大小不规则的颗粒线性排列组成,这些颗粒常融合成短杆状,还有一些小坑,小坑可融合成沟。这些结构在E面和P面的分布取决于所采用的制备方法。许多形态特征与格林(1981a)定义的“低等无脊椎动物褶皱分隔连接类型”相同。这种连接的生理意义尚不清楚。基于存在主要具有“低等无脊椎动物褶皱分隔连接”形态特征的分隔连接(包括成对分隔连接和褶皱分隔连接类型),我们可以补充这样一个假设,即箭虫与软体动物和节肢动物没有亲缘关系。

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