Department of Zoology, The Natural History Museum, London, UK.
Eur J Protistol. 1991 Feb 22;26(3-4):256-69. doi: 10.1016/S0932-4739(11)80147-1. Epub 2011 Nov 2.
Two strains and one population of Difflugia lucida have been studied, from Germany and Japan. The ultrastructure is described from selectively cultured specimens with thin shells; such agglutinate shells have a slightly different morphology from those provided with ample mineral grains. The cytoplasm is described and of particular interest are details of the 'ovular' nucleus, which has an additional lamina to the nuclear membrane, several nucleoli and changes its position within the region of dense endoplasmic reticulum. Two types of organic cement vesicles are secreted by the dictyosomes. The building blocks are spherical in the cytoplasm but when discharged often become elongate strips. Smaller cement vesicles discharge fibrous material which is used either to line the inner shell wall or possibly form the enclosing membrane of cysts. Some cytoplasmic differences associated with the first stage of division and precystic organisation are included. Comparisons are made with recent light microscope observations.
已经研究了来自德国和日本的两种品系和一个 Difflugia lucida 种群。从经过选择性培养的具有薄壳的标本中描述了超微结构；这种聚集的壳与具有丰富矿物质颗粒的壳在形态上略有不同。描述了细胞质，特别有趣的是“卵形”核的细节，它在核膜上有一个额外的层，几个核仁，并在密集的内质网区域内改变位置。两种类型的有机胶状囊泡由网质体分泌。在细胞质中，这些建筑块是球形的，但在排出时常常变成细长的条带。较小的胶状囊泡排出纤维状物质，这些物质要么用于内衬壳壁，要么可能形成囊肿的封闭膜。包括与第一次分裂和囊前组织相关的一些细胞质差异。与最近的光学显微镜观察进行了比较。
