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植物研究 ›› 2023, Vol. 43 ›› Issue (6): 953-960.doi: 10.7525/j.issn.1673-5102.2023.06.017

• 植物生殖生物学 • 上一篇    

濒危植物春剑的胚胎发育及果实和种子特征研究

王仁睿, 刘鑫, 李杰()   

  1. 西南科技大学生命科学与工程学院,绵阳 621010
  • 收稿日期:2023-07-20 出版日期:2023-11-20 发布日期:2023-11-08
  • 通讯作者: 李杰 E-mail:jay0224@sina.com
  • 作者简介:王仁睿(1981—),女,副教授,主要从事观赏园艺研究。
  • 基金资助:
    四川省科技计划项目(2017JY0132);四川省高等教育人才培养质量和教学改革项目(JG2021-899);西南科技大学龙山学术人才支持计划(17LZX521)

Embryo Development and Features of Seed and Fruit of Endangered Plant Cymbidium goeringii var. longibracteatum

Renrui WANG, Xin LIU, Jie LI()   

  1. School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010
  • Received:2023-07-20 Online:2023-11-20 Published:2023-11-08
  • Contact: Jie LI E-mail:jay0224@sina.com
  • About author:WANG Renrui(1981—),female,associate professor,majoring in ornamental horticultural research.
  • Supported by:
    Sichuan Science and Technology Program(2017JY0132);Sichuan Province Higher Education Personnel Training Quality and Teaching Reform Project(JG2021-899);Longshan Academic Talent Research Supporting Program of SWUST(17LZX521)

摘要:

以春剑(Cymbidium goeringii var. longibracteatum)的人工自花授粉获得的不同发育时期的蒴果为研究材料,通过显微镜和超微结构观察,对春剑胚胎发育、种子形成及果实解剖特征进行研究。结果表明:授粉60 d后可观察到大孢子母细胞,80 d后可见成熟胚囊结构,雌配子体发育属蓼型,120 d后发育形成球形胚和胚柄结构,180 d后胚柄退化,胚体处于球形胚阶段,胚胎发育类型为茄型。种子极微小,由内外种皮以及未分化的球形种胚组成,种胚体积占比约24%,储藏营养物质较少,种皮间有空气腔。子房由6个心皮瓣膜组成,3瓣带“V”字形胎座,为可育心皮瓣膜,其余3瓣无胎座,为不育心皮瓣膜,单粒种子平均质量(3.92±0.40) μg,1个蒴果中种子数量约为(37.98±3.71)万粒。

关键词: 春剑, 胚胎发育, 果实, 种子

Abstract:

The embryo development, seed formation and fruit anatomical characteristics of Cymbidium goeringii var. longibracteatum were investigated by microscopic and ultrastructure obsevation on the capsules at various developmental stages obtained by artificial self-pollination. The results showed that: megasporocyte and mature embryo sac were observed at 60 d and 80 d after pollination resepectively, and the female gametophyte was of polygonum type. Spherical embryo and suspensor structures formed after 120 d, and the suspensor degenerated and embryo body was at the globular stage after 180 d, and development of the embryo was of the solanad type. The seeds were extremely tiny, consisting of endopleura, episperm and undifferentiated globular embryo, accounting for about 24% of the seed embryo volume, and with little content of nutrients, and an air cavity between the seed coats.The ovary was composed of six carpel valves, three of which were fertile with a ‘V’ shaped placenta, and the others were infertile carpel valves without placenta. The average weight of a single seed was (3.92 ±0.40) μg, and the number of seeds in a capsule was(37.98±3.71)×104.

Key words: Cymbidium goeringii var. longibracteatum, embryo development, fruit, seed

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