Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Southwest China Normal University(Natural Science Edition)》 2006-01
Add to Favorite Get Latest Update

Ultrastructure of Early Oogenesis in Coreius Guichenoti

ZHANG Xian-fang,ZHANG Yao-guang,GAN Guang-ming,WANG Zhi-jianKey Laboratory of Aquatic Science of Chongqing,Key Laboratory of Eco-Environments in Three Gorges Reservoir Region(MOE) National Educational Bureau,Southwest University,Chongqing 400715,China  
From Mar.2002 to Jun.2003,Coreius guichenoti was collected in Changjiang River and the structure of early oogenesis in Coreius guichenoti was observed by transmission electron microscope.The results are as follows: The ooganium is round,which has a big nucleolus.Its nucleolus is composed of fibrillar center,dense fibrillar component,and granular component.There are little heterochromatin and much euchromatin;the cytoplasm has 1 or 2 nucleolus like bodies;mitochondria are small in number,whose plasm has low density of electron and its cristae is not aboundant.In the phrase 2,oocyte increases in volume and nucleolus gets more.In the early period of this phrase,nucleolus like body increases in cytoplasm,which are close to nuclear membrane and not around by mitochondria.There are many smooth endoplasmic reticulum.Glycogen granules distribute even;mitochondria congregate together.In the late period,nucleolus like body becomes small and disappears with the formation of membrane protrude.As for phrase 3,the cytoplasm gradually protrudes in the early period;in the middle period,zone radiata begins to form;follicular cells differentiate into granulose cells and thecal cells.The two kinds of cells are different from each other in ultrastructure;in the later period,they are bunches of developed collagen fibrillar arround oocyte,the thecal cells are flat and there are many organelles in the oocyte.This paper discusses the following questions: the characters of Coreius guichenoti's ovarian development,and compares the oogenesis of Coreius guichenoti with that of Coreius heterodon.
【Fund】: 教育部重点资助项目(02061);; 重庆市攻关资助项目(20016630)
【CateGory Index】: Q954.432
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved