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该文采用光学显微镜和透射电镜技术观察不同盐度下(5、20、30)人工选育卵形鲳鲹(Trachinotus ovatus)鳃线粒体丰富细胞的分布和超微结构变化。结果表明,线粒体丰富细胞主要分布于鳃丝和鳃小片基部,且随盐度升高而体积增大,数量增多;三个盐度组均存在由线粒体丰富细胞、扁平细胞和附细胞构成的顶端小窝,盐度5组线粒体丰富细胞顶膜面积较大,微脊发达,顶端小窝内凹,盐度20和30组线粒体丰富细胞顶膜面积相对较小,微脊不发达,顶端小窝明显内陷;盐度5和30组线粒体丰富细胞胞质内存在发达的微细小管系统,线粒体内脊丰富,盐度20组胞质内微细小管系统分布不均匀,结构松散,部分收缩成珠泡状结构,与粗面内质网相混杂。线粒体丰富细胞的结构变化与其所处的渗透压环境相适应。
In this paper, we observed the distribution and ultrastructure changes of mitochondria-rich cells in cultured (5, 20, 30) Artemia trachinotus ovatus under light salinity using light microscope and transmission electron microscope. The results showed that the mitochondria-rich cells mainly distributed in the gill filaments and the base of gill fragments, and increased with the increase of salinity. The number of mitochondria-rich cells increased in all three salinity groups. The mitochondria-rich cells, flat cells and adherent cells There was a large apical membrane area in mitochondria-rich cells in the five salinities groups. The micro-ridge was developed, the apical pit was concave, the apex area of mitochondria-rich cells in salinity 20 and 30 groups was relatively small, Obviously saltwater. In the salinity 5 and 30 groups, there were well-developed microtubule system in the cytoplasm of mitochondria-rich cells. The mitochondria were abundant in the cytoplasm of the salinity groups. The distribution of the microtubule system in the cytoplasm of salinity 20 was not uniform and the structure was loose. Like structure, mixed with rough endoplasmic reticulum. The structural changes of mitochondria-rich cells are compatible with the osmotic environment in which they are located.