Ganoine formation in the scales of primitive actinopterygian fishes, lepisosteids and polypterids.
Ganoine formation in the scales of primitive actinopterygian fishes, lepisosteids and polypterids.
复制标题
原始放线鱼、lepisosteids 和polypterids 鳞片中的Ganoine 形成。
DOI：
10.3109/03008209509017006
复制
发表时间：
1995
影响因子：
2.9
通讯作者：
J. Sire
中科院分区：
文献类型：
--
作者：
J. Sire
原始生活的辐鳍鱼类，lepisosteids和polypterids的鳞片，保留了硬鳞鱼类祖先鳞片上的高矿化层-硬鳞鱼。为了最终了解其组织起源于辐鳍类谱系，在Lepisosteus oculatus中描述了硬鳞的形成，其鳞片没有牙本质，并将其与两种多足类的硬鳞形成进行了比较，Calamoichthys calabaricus和Polypterus senegalus，其鳞片具有牙本质层。使用光和透射电子显微镜在实验再生尺度上研究了在鹅膏沉积之前、期间和之后发生的事件。尽管鳞片表面的组织成分和表皮细胞的组织结构不同，但两种鳞片的鳞皮形成是相似的。孕釉是由表皮细胞沉积，并构成一个厚厚的层，逐渐矿化成为鹅膏，一个真正的釉质。将参与鹅膏形成的细胞过程与哺乳动物牙齿中的釉质所描述的细胞过程进行比较。
The scales of primitive living actinopterygian fishes, lepisosteids and polypterids, have retained ganoine, a hypermineralized layer which covered the scales of the osteichthyan ancestors. To know finally its tissue origin in the actinopterygian lineage, ganoine formation was described in Lepisosteus oculatus, with scales devoid of dentin, and was compared to ganoine formation in two polypterids, Calamoichthys calabaricus and Polypterus senegalus, with scales possessing a dentin layer. The events taking place before, during and after ganoine deposition were studied in experimentally regenerated scales using light and transmission electron microscopy. In spite of differences in tissue composition and in organization of the epidermal cells on the scale surface, ganoine formation is similar in both types of scales. Preganoine is deposited by epidermal cells and constitutes a thick layer which mineralizes progressively to become ganoine, a true enamel. The cellular processes involved in ganoine formation were compared to those described for enamel in mammalian teeth.