摘要
为了积累四倍体刺槐生殖生物学资料和为四倍体刺槐遗传改良奠定基础,对四倍体刺槐的大小孢子发生与雌雄配子体发育进行了研究.结果表明:四倍体刺槐花药壁由孢原细胞分裂形成的初生壁细胞发育而来,中层较早解体,绒毡层发育属腺质绒毡层.小孢子母细胞减数分裂为同时型,多形成四面体型的四分体,成熟花粉为2-细胞型;胚囊发育为蓼型,成熟胚珠为双珠被、厚珠心、弯生型胚珠,靠近合点端的大孢子为有功能大孢子,成熟胚囊为8核.
In order to calculate the information about the procreation biology and make a base for genetic improvement for tetraploid Robinia pseudoacacia,the development of megaspore and microspore genesis and the formation of female and male gametophytes were researched.The results were as the followings： the anther was 4-sporangia and its anther wall formation conformed to the dicotyledonous type.And also,the tapetum was of the glandular type and its most cells were a 1-nucleate and of cytokinesis at meiosis of microspore mother cells and were simultaneous,and tetrads were tetrahedral.Besides,mature pollen grains were 2-celled.In addition,the development of embryo sac was of the polygonum type.The mature ovules were campylotropous with dual-integument and crassinucellate.The megaspore at chalazal end became a functional megaspore.There were eight nuclears in the mature embryo sac.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2007年第5期12-17,共6页
Journal of Beijing Forestry University
基金
国家自然科学基金项目(30640036)
国家林业局重点推广项目(2003--5--2)
北京林业大学研究生基金项目(05jj038)
关键词
四倍体刺槐
大小孢子发育
雌雄配子体
tetraploid Robinia pseudoacacia,megaspore and microspore cytological development,female and male gemetophytes
