%0 Journal Article
%A LI Yun-Zeng
%A LU Yun-Shen
%A WANG Xiu-Hua
%A ZHENG Jing-Yuan
%A ZHOU Cui-Cui
%T Study on Embryology of <em>Ulmus pumila</em> L.
%D 2017
%R 10.7525/j.issn.1673-5102.2017.05.003
%J Bulletin of Botanical Research
%P 651-657
%V 37
%N 5
%X The processes of embryology of <em>Ulmus pumila</em> L. were observed by serial paraffin sections and under optical microscope. The results are as follows: the anther wall of <em>U.pumila</em> L. includes 4 layers; the cytoplasmic division of microspore mother cells during meiosis was simultaneous; the tetrad of microspores resulted from the meiosis are simultaneously bilateral and tetrahedral;mature pollen grains are two-cell type. The development of the anther wall belongs to a dicotyledonous type. Tapetum belongs to glandular tapetum. The ovary consists of 2 carpels with a single locule,parietal placenta,anatropous ovule,double integument,and thick nucellus. The tetrad of megaspores is linear or T-type in arrangement.Embryo sac of <em>U.pumila</em> L. is of single-spore polygonum type. The embryogenesis of <em>U.pumila</em> L. conformed to the So-lanad type; karyotype endosperm; cotyledon embryo without endosperm.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2017.05.003