极北鲵消化道嗜银细胞的胚后发生

为了探讨极北鲵(Salamandrella keyserlingii)消化道嗜银细胞胚后发生的形态学特征及分布规律,采用Grimelius银染法,对30～46期的极北鲵幼体进行了研究。结果显示,嗜银细胞在食管、胃、小肠各部分的发生时间不同。胃中的嗜银细胞在第41期出现,小肠中的在第42期出现,食管中的在第43期出现。嗜银细胞形态多样,有圆形、椭圆形、梭形和锥体形,大多分布在消化道黏膜上皮之间。根据嗜银细胞的形态判定其可能具有内分泌和外分泌两重功能。极北鲵胚后发育消化道各部位嗜银细胞出现顺序的不同可能与其消化生理活动及个体生理活动的变化相适应。

Argyrophil Cells in Digestive Tract in the Postembryonic Development of Salamandrella Keyserlingii

Morphology and distribution of Argyrophil cells in the digestive tract in the postembryonic development of Salamandrella keyserlingii were investigated by means of silver nitrate method of Grimelius. The result showed: Argyrophil cells first appeared between mucous epithelial cells in the stomach of Salamandrella keyserlingii at stage 41 in round, oval, as well as conical shapes, with their processes extending to nearby cells. Argyrophil cells were first observed in the intestine at stage 42. They mainly distributed between epithelial cells in cone-shape or shuttle-shape. Argyrophil cells appeared in the esophagus as late as stage 43. They mainly distributed between epithelial cells in various forms. According to the morphology of the argyrophil cells, they have endocrine and exocrine functions.