泥鳅早期胚胎细胞的超微结构变化观察

泥鳅早期胚胎细胞的超微结构变化：卵裂期，有些线粒体内含有片层状类脂物，或者含有糖原颗粒，有些线粒体嵴呈同心圆状．在胚胎细胞中也有片层状类脂物，其中有些片层体内含有黑色糖原颗粒，类似于次级溶酶体；外包一层单位膜的卵黄颗粒起始含无定形的卵黄物质，然后卵黄中间出现空泡，不久卵黄颗粒中出现线粒体、膜性物质、核糖体样颗粒、糖原颗粒和小的卵黄粒．由此可见，卵黄除了向胚胎细胞提供营养物质之外，还向胚胎细胞提供膜性物质和核糖体等．以上这些观察结果，对于丰富鱼类个体发育的基本理论具有重要意义

THE OBSERVATION OF ULTRASTRUCTURAL CHANGES OF EARLY EMBRYONIC CELLS OF LOACH (MISGURNUS ANGUILLICAUDATUS)

The Ultrastructural changes of early embryonic cells have been observed:In cleavage stage some mitochondria contain lamellar lipid material,some contain glycogen granules and some mitochondria crests are in the shape of concentric circles.In the blastomere,there are lamellar lipid structures in which some contains black granules similar to the structure of the sencondary lysosome.At the beginning the yolk granules in blastomere are surround individually by a unit membrane and contain only amorphous yolk material.And then,small vesicles appear in them.After that,some mitochondria,membranous elements,ribosome like bodies or glycogen granules and small yolk particles appear in the large yolk granules.It is suggested that the yolk not only contributes soluble nutrient to the blastomere,but privides memtranous material and ribosome or glycogen granules also.