MODE OF ATTACHMENT OF TRYPANOSOMA-VIVAX IN PROBOSCIS OF TSETSE FLY GLOSSINA-FUSCIPES - ULTRASTRUCTURAL STUDY OF EPIMASTIGOTE STAGE OF TRYPANOSOME
MODE OF ATTACHMENT OF TRYPANOSOMA-VIVAX IN PROBOSCIS OF TSETSE FLY GLOSSINA-FUSCIPES - ULTRASTRUCTURAL STUDY OF EPIMASTIGOTE STAGE OF TRYPANOSOME
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DOI：
10.1111/j.1550-7408.1973.tb00909.x
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发表时间：
1973-01-01
期刊：
影响因子：
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通讯作者：
VICKERMAN, K
中科院分区：
文献类型：
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作者：
VICKERMAN, K
对舌蝇舌部附着型间日锥虫群的超微结构进行了电镜观察。有些鞭毛通过鞭毛直接附着在昆虫阴唇的内壁上，大多数鞭毛沿着长鼻轴排列。其他锥虫是间接附着的，它们的鞭毛附着在直接附着的鞭毛上。在鞭毛膜上发现与后生上皮相似的连接复合体。长带状半桥粒将鞭毛连接到喙壁上，一系列紧密相连的黄斑桥粒将相邻鞭毛的鞭毛膜连接起来。不像锥乳虫阶段。间日，沿锥虫鞭毛-体交界处可能存在多排黄斑桥粒。这表明，所有这些连接复合物都是为了支持鞭毛虫对其昆虫宿主的附着，从而在苍蝇吸血时维持寄生虫的锚定。锥虫鞭毛形成连接复合物的能力可能是它们作为寄生虫成功的一个因素，这种适应使它们能够在附着在宿主表面时繁殖。
The ultrastructure of attachedTrypanosoma vivaxepimastigote clusters in the proboscis of the tsetse flyGlossina fuscipesis described from electron micrographs of thin sections. Some flagellates are attached directly to the lining of the insect's labrum by their flagella, most of which are aligned along the long axis of the proboscis. Other trypanosomes are attached indirectly, their flagella adhering to those of flagellates which are directly attached. Junctional complexes similar to those described from metazoan epithelia are found on the flagellar membrane. A long zonular hemidesmosome attaches the flagellum to the proboscis wall and a series of closely set macular desmosomes link the flagellar membranes of adjacent flagellates. Unlike the trypomastigote stages ofT. vivax, more than one row of macular desmosomes may be present along the flagellum‐body junction of the trypanosome. It is suggested that all these Junctional complexes serve to buttress the flagellate's attachment to its insect host and so maintain anchorage of the parasite during the fly's blood meals. The ability of the flagellum of trypanosomatids to form Junctional complexes may be a factor contributing to their success as parasites, this adaptation enabling them to multiply while attached to host surfaces.