Welcome to Journal of University of Chinese Academy of Sciences，Today is
RSS 中文

Previous Articles     Next Articles

Formation of microspores and development of male gametes in Paeonia jishanensis, with an analysis of factors of endangerment of this entity

PAN Kai-Yu, WEN Jie, LUO Yi-Bo, ZHOU Shi-Liang   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-05-10 Published:1999-05-10
  • Contact: PAN Kai-Yu

Abstract:

Investigated in the present work were development of microspores and formation
  Of male gametes in Paeonia jishanensis T．Hong et W．Z．Zhao)．Its anthers are 4-sporran-
  giate；structure of anther wall is of the Dicotyledonous type，with glandular tapetum；cy-
  tokinesis at meiosis of microspore mother cells is simultaneous；tetrads are mostly tetrahe-
  dral，less frequently isobilateral，and mature pollen grains are 2-celled． The overall observa-
  tion on formation of microspores and development of male gametes made in this work is the
  first for woody peonies．In addition，we observed in the present work abnormal phenomena
  at meiosis of microspore mother cells and uninucleate microspores，and also made measure-
  ments of fertility of pollen grains．The results show that their fertility ranges from 45.0％ to
  84.2％ and varies among flowers，among anthers in a flower and among microsporangia in
  an anther． The abnormal processes found in development of male gametes are not considered
  as an important factor responsible for the endangerment of the species．

Key words: Paeonia jishanensis, Male gametes, Abnormality

Copyright © Journal of University of Chinese Academy of Sciences

Support by Beijing Magtech Co.ltd support@magtech.com.cn