Pevet P, Kappers J A, Nevo E
Cell Tissue Res. 1976 Oct 22;174(1):1-24. doi: 10.1007/BF00222147.
The ultrastructure of pinealocytes of the mole-rat (Spalax ehrenbergi), a blind subterranean mammal living in complete darkness, was examined and compared with pinealocytes of other mammals. Two different populations of pinealocytes (I and II) were observed. They differed in general aspect. In location and especially in their content of cell organelles involved in synthetic processes. Mitochondria, ribosomes, granular endoplasmic reticulum, lysosomes, lipid inclusions and glycogen granules were present in the perikarya of pinealocytes of both populations. In the pinealocyte of population I some granular vesicles were occasionally observed in the cell body. Their presumed origin from the Golgi apparatus could not be clearly demonstrated. In the perikaryon of this pinealocyte, concentrations of ribosomes and of cisternae of the granular endoplasmic reticulum were constantly observed. These concentrations may indicate an intensive synthetic activity. Pinealocytes of population II were characterized by accumulations of proteinaceous material in some cisternae of the granular endoplasmic reticulum and between the two layers of the nuclear membrane. The origin of these peculiar elements is discussed.
对盲鼹形田鼠（Spalax ehrenbergi）（一种生活在完全黑暗环境中的地下盲哺乳动物）松果体细胞的超微结构进行了检查，并与其他哺乳动物的松果体细胞进行了比较。观察到两种不同类型的松果体细胞（I型和II型）。它们在总体外观、位置上存在差异，尤其是在参与合成过程的细胞器含量方面。两种类型松果体细胞的胞核周围均存在线粒体、核糖体、粗面内质网、溶酶体、脂质包涵体和糖原颗粒。在I型松果体细胞的细胞体中偶尔会观察到一些颗粒状小泡。无法明确证明它们推测的源自高尔基体。在这种松果体细胞的核周，经常观察到核糖体和粗面内质网池的聚集。这些聚集可能表明有强烈的合成活动。II型松果体细胞的特征是在粗面内质网的一些池以及核膜的两层之间有蛋白质物质的积累。讨论了这些特殊成分的来源。
