Comparative studies on histological and ultra-structure of the pituitary of different ploidy level fishes

作     者：LONG Yu LIU Shaojun HUANG Weiren ZHANG Jian SUN Yuandong ZHANG Chun CHEN Song LIU Jinghui LIU Yun 

作者机构：College of Life SciencesHunan Normal UniversityChangsha 410081China 

出 版 物：《Science China(Life Sciences)》 (中国科学(生命科学英文版))

年 卷 期：2006年第49卷第5期

页      面：446-453页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.30330480) the State Key Basic Research Project of China(abbreviate:973 Project)(Grant No.2001CB109006) the Doctoral Station of University of the Education Ministry of China(Grant No.200405422001) 

主　　题：diploid triploid ailotetraploid pituitary histological structure ultra-structure 

摘      要：The histological and ultra-structure of the pituitary in diploid red crucian carp(Carassius auratus red var.),triploid crucian carp and allotetraploid hybrids within and after the breeding season were comparatively *** result showed that there were six endocrine cell types in the pituitary of these three kinds of fishes,and there was an obvious difference in cell size among different ploidy level *** for the same type of pituitary cells,the cell size was increased gradually with the in-creasing ploidy *** the breeding season,the allotetraploid hybrids had higher proportion of go-nadotropin cells(GTH)than triploids,and the triploids had higher proportion of GTH than *** results were related to the earlier sexual maturity of allotetraploid hybrids and sterility of triploid cru-cian *** the other hand,among the three kinds of fishes,the proportion of somatotropin(STH)cells in triploids crucian carp was the highest,whereas that in allotetraploid hybrids was the *** results might be connected with the faster growth rate of triploids and slower growth rate of al-lotetraploid *** addition,in GTH cells of meso-adenohypophysis after the breeding season,there were many endocrine particles in triploids,while those endocrine particles were released from the cells in allotetraploids and *** result showed that the sterility of triploid crucian carp might be related to the hormone which was not released from the GTH *** a word,the present study indicated that the differences in the structure of pituitary among different ploidy level fishes contributed to their difference in the growth rate and gonadal development.