Ultrastructure Study of the Prehypophyseal Cells in F1 Hybrid-marrah Buffalo

SONG Xiao-bai1,PAN Qiong1,PAN Tang-feng2,QIN Jin1,LI Jin-xiu1,XIE Ying-xue1,LI Rui-ming1,HAN Tao1,YANG Bing-zhuang3,XU Dian-xin4(1.Animal Science & Technology College,Guangxi University,Nanning 530005,China;2.Guangxi Animal Health Surveillance Institute of Nanning High Technology Zone,Nanning 530007,China;3.Guangxi Buffalo Research Institute,Nanning 530001,China;4.Guangxi Animal & Poultry Breed Improvement Station,Nanning 530001,China)

prehypophyseal cells;ultrastructure;F1 hybrid-marrah buffalo

Under transmission electron microscope,the prehypophyseal cells in F1 hybrid-marrah buffalo have five marked cells types in common,their ultrastructural features appeared characteristically.Gonadotrophs are round in shape,which about 7.6 to 9.0 μm in diameter;the size of secretory granules is either big or small clearly,which has high electron density.Thyrotroph is about 6.0 to 7.5 μm in diameter and contains irregular nuclei in the centre mostly;their secretory granules are generally minor and tiny,distributed in the vicinity of plasmalemma.Adrenocorticotrophic hormone(ACTH)cells are ovoid in shape and 7.1 to 8.5 μm in diameter;irregular nuclei always is side incline;their secretory granules occurred in cytoplasmic periphery or one side.Somatotrophs are round,containing rounded nuclei and numerous secretory granules.Lactotrophs are almost the biggest cells in pituitary,numerous cells of various size are full of periplast.The results aimed to provide the morphology basic data for controlling reproduction endocrine in F1 hybrid-marrah buffalo.