A Fine Structural Aspect of the Development of Scales in the Chum Salmon Fry
A Fine Structural Aspect of the Development of Scales in the Chum Salmon Fry
复制标题
鲑鱼苗鱼鳞发育的精细结构
DOI：
10.2331/suisan.37.18
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发表时间：
1971
影响因子：
0.4
通讯作者：
J. Yamada
中科院分区：
文献类型：
--
作者：
J. Yamada
用电子显微镜研究了鲑鱼(Oncorhynchus Keta)鳞片发育的早期阶段。骨基质由细小的胶原纤维和致密的基质组成，由聚集在真皮下结缔组织中的鳞片乳头细胞分泌。这些成骨细胞的特征是颗粒内质网池的扩张，相当多的线粒体和丰富的游离核糖体。基质的钙化开始于针状羟基磷灰石微晶的出现，这些微晶被分散在基质中的小而致密的颗粒所限制。随着钙化的进行，它们的数量和大小都会增加。另一种细胞将厚厚的胶原纤维添加到钙化骨层的下表面，形成纤维板。这些细胞呈长方形，特征是平行排列的高度广泛的颗粒内质网和发达的高尔基带和溶酶体。鳞片隆起是骨质层部分增厚。横断面上的骨脊似乎是在鳞缘细胞扁平的过程中，上部成骨细胞与相邻的外部细胞倾斜覆盖而形成的。
Early phases of scale development in the chum salmon (Oncorhynchus keta) were studied by electron microscopy. The osseous matrix, composed of fine collagenous fibrils and dense ground substance, is secreted from cells of the scale papilla aggregated in the subepidermal connective tissue. The presence of dilated cisternae of the granular endoplasmic reticulum, rather numerous mitochondria, and abundant free ribosomes characterizes these osteogenic cells. Calcification of the matrix begins with the appearance of clusters of needle-shaped hydroxyapatite crystallites being limited within small dense particles scattered in the matrix. As the calcification progresses, they increase in number as well as in size. Thick collagen fibrils are added onto the lower surface of the calcified osseous layer by another kind of cells to form the fibrillary plate. These cells, rectangular in form, are characterized by a parallel array of highly extensive granular endoplasmic reticulum and well-developed Golgi zones with lysosomal bodies. The scale ridge arises as a partial thickening of the osseous layer. The ridge in cross section appears to be formed when an upper osteogenic cell is overlaid obliquely by the adjacent outer cell in the process of flattening of cells of the scale margin.