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植物研究 ›› 2017, Vol. 37 ›› Issue (5): 651-657.doi: 10.7525/j.issn.1673-5102.2017.05.003

• 研究报告 • 上一篇    下一篇

家榆胚胎学研究

郑婧媛, 李芸增, 周萃萃, 卢耘申, 王秀华   

  1. 东北林业大学生命科学学院, 哈尔滨 150040
  • 收稿日期:2017-04-09 出版日期:2017-09-15 发布日期:2017-09-15
  • 通讯作者: 王秀华,E-mail:shengming615@163.com E-mail:shengming615@163.com
  • 作者简介:郑婧媛(1991-),女,硕士研究生,主要从事植物生殖生物学研究。
  • 基金资助:
    东北林业大学生命科学学院院级大学生创新项目资助

Study on Embryology of Ulmus pumila L.

ZHENG Jing-Yuan, LI Yun-Zeng, ZHOU Cui-Cui, LU Yun-Shen, WANG Xiu-Hua   

  1. College of Life Science, Northeast Forestry University, Haerbin 150040
  • Received:2017-04-09 Online:2017-09-15 Published:2017-09-15
  • Supported by:
    This study was funded by the college student innovation project of the College of Life Science,Northeast Forestry University.

摘要: 采用常规石蜡切片法,借助光学显微镜对家榆胚胎发育进行研究,研究结果表明:(1)家榆的花药具4个药室;小孢子母细胞减数分裂过程中的胞质分裂为同时型;小孢子四分体排列为四面体型和左右对称型;成熟花粉为2-细胞型;(2)花药壁发育类型为双子叶型,腺质绒毡层;(3)家榆子房两心皮1室,侧膜胎座,1枚倒生胚珠,双珠被,厚珠心;四分体呈直线型和T型排列;(4)家榆胚囊类型为单孢子蓼型胚囊;胚的发育类型为茄型;核型胚乳;无胚乳型种子。

关键词: 家榆, 胚胎学, 大、小孢子, 雌、雄配子体, 胚, 胚乳

Abstract: The processes of embryology of Ulmus pumila L. were observed by serial paraffin sections and under optical microscope. The results are as follows: the anther wall of U.pumila 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 U.pumila L. is of single-spore polygonum type. The embryogenesis of U.pumila L. conformed to the So-lanad type; karyotype endosperm; cotyledon embryo without endosperm.

Key words: Ulmus pumila L., embryology, megaspore and microspore, female and male gamete, embryo and endosperm

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