An electron microscope study of the tegument and associated structures of Proteocephalus pollanicoli
An electron microscope study of the tegument and associated structures of Proteocephalus pollanicoli
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Proteocephalus pollanicoli 外皮和相关结构的电子显微镜研究
DOI：
10.1017/s0031182000069171
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发表时间：
1965
期刊：
影响因子：
2.4
通讯作者：
L. Threadgold
中科院分区：
文献类型：
--
作者：
L. Threadgold
Proteocephalus pollanicoli的皮层分为两个层次。外层是由颗粒基质中的小泡组成的原生质合胞体层。该层的表面有微绒毛样结构，微毛，具有尖锐的电子致密的尖端和较不致密的基部。胞饮小泡、大空泡和外翻发生在外部水平的表面，而线粒体和脂滴倾向于集中在基部。基质膜在某些地方有小的内陷，在其他地方有大的外翻，形成连接外部和内部水平的原生质管。内部层次由致密的颗粒状原生质组成，每个区域都有一个细胞核。这些区域或表皮细胞含有脂滴、线粒体、短的无颗粒内质网和磷脂体。两个紧贴在一起的表皮细胞可以通过原生质桥连接，从而形成有限的合胞体。这种Proteocephalid的外皮的形态进行了比较与cyclophyllidean物种和寄生蠕虫的外皮的功能进行了讨论。我要感谢W先生的技术援助。Ferguson和A.莱尼斯我还要感谢惠康信托基金会为购买明石transscope和辅助设备提供赠款。
The tegument of Proteocephalus pollanicoli is organized at two levels. The external level is a syncytial layer of protoplasm composed of vesicles in a granular matrix. The surface of this level has microvillus-like structure, microtriches, with sharp electron dense tips and less dense bases. Pinocytotic vesicles, large vacuoles, and evaginations occur at the surface of the external level, whereas mitochondria and lipid droplets tend to be concentrated basally. The basal plasma membrane has in some places small invaginations and at others large evaginations forming protoplasmic tubes which connect the external and internal levels. The internal level is composed of individual areas of dense, granular protoplasm, each of which has a nucleus. These areas, or cuticular cells, contain lipid droplets, mitochondria, short lengths of agranular endoplasmic reticulum and phospholipid bodies. Two cuticular cells lying close together may be joined by a protoplasmic bridge and thereby form a limited syncytium. The morphology of the tegument of this proteocephalid is compared with that of the cyclophyllidean species and the function of the tegument in parasitic helminths is discussed. I should like to acknowledge the technical assistance of Mr W. Ferguson and Mr A. Lyness. My thanks are also due to the Wellcome Trust for a grant to purchase the Akashi Transcope and ancillary equipment.