罗非鱼脑垂体结构研究——Ⅰ.腺垂体前叶的超微结构  

STUDIES ON THE STRUCTURE OF PITUITARY IN OREOCHROMIS NILOTICA Ⅰ. ULTRASTRUCTURE OF THE ROSTRAL PARS DISTRALIS OF ADENOHYPOPHYSIS

作　　者：方展强[1] 何艾文[1] 

机构地区：[1]华南师范大学生物系,广州510631

出　　处：《水生生物学报》1993年第3期252-258,295-296,共7页Acta Hydrobiologica Sinica

摘　　要：本文研究尼罗非鲫Oreochromis nilotica腺垂体前叶的超微结构。前叶主要由促肾上腺皮质激素分泌细胞(ACTH)、催乳激素分泌细胞(PRL)和一种非分泌类型的星状细胞(SC)所构成。对脑垂体结构的周年观察,表明在产卵期间ACTH细胞和PRL细胞均高度活跃,ACTH的分泌可能促进排卵活动,而PRL的分泌活动则受温度变化的影响。腺垂体前叶只接受B型神经分泌纤维的直接支配,星状细胞和Ⅱ型脑垂体细胞则参与腺细胞分泌颗粒的释放和运输等活动。本文并讨论了腺细胞的分泌颗粒通过胞吐和扩散两种方式释放等特点。The ultrastructure of the rostral pars distalis of adenohypophysis was examined in Oreochromis nilotica. The rostral pars distalis is mainly composed of adrenocorticotrophic cells, prolactin cells and one non-secretory cell type-stellate cells. The observations on the annual cycle of the structure of pituitary showed that the adrenocorticotrophic cells and prolactin cells become active during ovulation. It is suggested that ACTH secretion may facilitate ovulation and the prolactin cell activity is attached by changes in environmental temperature. In rostral pars distalis, only the prolactin cells receive direct innervation from type B neurosecretory ending. The steUate cells and type Ⅱ pituicytes play an important role in releasing and transfering the secretory granules from the secretory cells. Two means by which the secretory granules are released, exocytosis and diffusion from the secreting cells, are discussed.

关 键 词：腺垂体 尼罗非鲫 罗非鱼 脑垂体 

分 类 号：Q959.483[生物学—动物学]