STUDIES ON THE MICRO-STRUCTURE OF PITUITARY GLAND AND ULTRASTRUCTURE OF ADENOHYPOPHSIS IN CHINEMYS REEVESII
乌龟脑垂体显微及其腺垂体超微结构的研究

Chinemys reevesii is an important cultivated aquatic animal in China.It has values for food and Chinese medicine.In the paper,it was used to study on the pituitary gland of Chinemys reevesii which was 3-year-old female individual with weight between 325g to 490g by microscope and transmission electron microscope.The results showed that there were two major portions of the pituitary gland,the handle-shaped neurohypophsis and the oval adenohypophsis.As the neurohypophsis was situated over the tail region of adenohypophsis,the pituitary gland of the turtle belonged to dorsoventral style.The nerve lobe of the neurohypophsis was not developed enough.The adenohypophsis was further divided into pars distalis(PD) and pars intermedia(PI).There were some characteristic vacuoles of sinusoid in pars intermedia.The pars distalis was composed of three main kind of cells,acidophilia, basophil and chromophobe.Under transmission electron microscopy,the pars distalis of adenohypophysis mainly had 5 secretory hormone cell types,including growth hormone(GH) cell,prolactin(PRL) cell,thyrotropin(TSH) cell,adrenocorticotrophic hormone(ACTH) cell,gonadotrophin(GTH) cell and non-secretory type folliculo-satellite cell(FS).It was the most different that Chinemys reevesii had big nucleus and less secretory granules in the growth homone cell from other animals.These were possibly associated with the biological characters of slow growth and long-live life in Chinemys reevesii