三角帆蚌珍珠囊细胞的分泌活动

本文对三角帆蚌珍珠囊细胞的分泌活动进行了亚显微结构的研究。发现珍珠囊表皮细胞能积极地进行物质合成 ,这些物质主要是蛋白质、硫酸化粘多糖和中性粘多糖 ,并将这些物质以微绒毛分泌、块状物分泌、细胞间隙分泌和大颗粒分泌等多种方式分泌到珍珠囊腔 ;而位于珍珠囊表皮细胞之间的、来源于外套膜结缔组织的腺细胞则含有丰富的中性粘多糖 ,并通过开口式分泌的方式释放到珍珠囊腔 ,同珍珠囊表皮细胞分泌的物质一起 ,共同参与珍珠结晶层的形成 ;珍珠囊细胞分泌的多样性与珍珠组成的复杂有关 ;珍珠囊细胞的分泌活动具有节律性和区段性的特点 ,这种区段性和节律性的分泌与珍珠多层结晶纤层的形成相适应。

THE SECRETING ACTIVITIES OF THE PEARL-SAC CELLS OF HYRIOPSIS CUMINGII

By ultrastructural studies on the secreting activities of pearl sac cells of Hyriopsis cumingii, the pearl sac epithelial cells have developed rough endoplasmic reticulum for synthesizing was found. Some kinds of substance which are mainly composed of proteins, sulfated mucopolysaccharides and neutral mucopolycaccharides, and the synthesized substance can be secreted by ways of mivrovilli, lump like substance, cell gap, large grain, and the gland cells between the pearl sac epithelial cells, which are from the connective tissue of the mantle and contain rich neutral mucopolysaccharides, and can secrete their contents by means of the breaking of the top of these cells. The secretion diversity of the pearl sac epithelial cells is determined by the complexity of the pearl composition. The secretion of the pearl sac cells is rhythmic, which is adaptive for the formation of the multiple crystalline layers of the pearl.