四季鹅甲状旁腺在产蛋期与停产期的显微和超微结构的比较研究

A Comparative Study on Micro-and Ultra-Structures of Parathyroid Gland of Siji Goose in Laying and Nonlaying Periods

鹅甲状旁腺实质仅由主细胞构成，没有嗜酸性细胞。Ｈ－Ｅ染色，产蛋鹅主细胞较大，胞质深染，胞核大而圆，核仁明显；停产期主细胞质淡染，较清亮。电镜下产蛋期主细胞电子密度中等，胞质内含有丰富的细胞器：线粒体多，常膨大成圆形；高尔基复合体发达；粗面内质网稍扩张；脂质滴与分泌前颗粒均较多，成熟的分泌颗粒大而少，细胞功能活跃。停产期主细胞的细胞器较少；核常染色质少。

The perenchyma of the goose parathyroid composed the chief cell, a single cell type,without the oxyphil cell.With H-E staining,the larger chief cells in laying period have darkly staining cytoplasm and contain hyperstainable nuclei which are dialate to ovoid in shape and develop nucleoli when compared with that of nonlaying in which the cell takes appearance of clear,watery.The ultrastructure of laying goose indicates that chief cells displaying with medium electron density possess abundant organelles including numerous round mitochondria,developed Golgi complex and slightly-enlarged rough endoplasmic reticula.Larger amount of lipid droplets and pre-secretory granules are also observed in matrix,but mature secretory granules are large and few,which shows the cell is active in its function.In nonlaying period,the chief cell contains undeveloped organelles in cytoplasm and less euchromatin in nucleus,which indicates inactivity of the cell function.