Ultrastructure of the vegetative organisation and initial stages of silica plate deposition in the soil testate amoebaCorythion dubium
Ultrastructure of the vegetative organisation and initial stages of silica plate deposition in the soil testate amoebaCorythion dubium
复制标题
土壤睾丸阿米巴Corythion dubium中营养组织的超微结构和硅片沉积的初始阶段
作者：
C. G. Ogden
Corythion dubium的硅质体板被一条有机胶结物带所束缚，该胶结物在侧缘最厚。前部的空泡细胞质被一个色素区隔开，在中间体区域形成一条暗带，从紧凑的后部区域包含一个典型的囊状核，被一个致密的内质网区域包围。一个由微管构成的薄膜状篮状结构包围着后部的细胞质。大的高尔基复合体位于细胞核和基底之间。在周边细胞质中，可以看到许多来自高尔基池的有衣和无衣小泡。这些小的硅质板被包围在位于质膜表面皱褶中的硅沉积囊泡中，通常与一对微管相关联。观察这些囊泡的形成和二氧化硅沉积的早期阶段。比较了C. dubium和choanoflagellates，其中硅沉积囊泡和微管之间存在类似的关联。
SummaryThe siliceous body plates ofCorythion dubium are bound by a band of organic cement which is thickest at the lateral margins. The anterior vacuolar cytoplasm is separated by a pigment zone, which forms a dark band in the mid-body region, from the compact posterior region containing a typical vesicular nucleus surrounded by a region of dense endoplasmic reticulum. A pellicular basket of microtubules surrounds the posterior cytoplasm. The large Golgi complex lies between the nucleus and the fundus. Numerous coated and uncoated vesicles from the Golgi cisternae are seen in the peripheral cytoplasm alongside developing plates. These small siliceous plates are enclosed in silicon deposition vesicles lying in surface ruffles of the plasmalemma, often in association with a pair of microtubules. Observations are made on the formation of these vesicles and the early stages of silica deposition. A comparison is drawn between silica deposition inC. dubium and choanoflagellates where there is a similar association between silicon deposition vesicles and microtubules.