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植物研究 ›› 1999, Vol. 19 ›› Issue (1): 40-47.

• 论文 • 上一篇    下一篇

短柄五加胚和胚乳发育的研究

王仲礼1, 刘林德1, 田国伟2, 申家恒1   

  1. 1. 烟台师范学院生物系, 烟台 264025;
    2. 北京大学生命科学院, 北京 100871
  • 收稿日期:1997-06-25 出版日期:1999-03-15 发布日期:2016-06-14
  • 基金资助:
    国家自然科学基金重大项目资助课题(No.39391500)。

THE DEVELOPMENTOF EMBRYO AND ENDOSPERM IN ELEUTHEROCOCCUS BRACHYPUS

Wang Zhong-li1, Liu Lin-de1, Tian Guo-wei2, Shen Jia-heng1   

  1. 1. Department of Biology, Yantai Normal University, Yantai 264025;
    2. College of Life Sciences, Peking University, Beijing 100871
  • Received:1997-06-25 Online:1999-03-15 Published:2016-06-14

摘要: 短柄五加(Eleutherococcus brachypus Harms.)胚发育属茄型,棒形胚后期胚柄最为发达,球形胚期胚柄开始退化,心形胚期胚柄解体。胚乳发育属核型,当胚乳游离核为200~300个时,以自由生长细胞壁的方式进行胚乳细胞化。胚乳细胞进一步增殖以有丝分裂方式进行。球形胚时,胚乳组织最外层细胞特化为分泌层,胚乳细胞贮藏蛋白质和脂类物质。在胚乳游离核为32~64个时,单珠被的内表皮层分化为珠被绒毡层。合子分裂后,珠被绒毡层发育最为充分;棒形胚后期,珠被绒毡层被挤压;球形胚期,珠被绒毡层解体。珠被外表皮层特化为种皮。

关键词: 短柄五加, 胚, 胚乳, 珠被绒毡层, 发育

Abstract: The development of embryo of Eleutherococcus brachypus belongs to Solanad type.In the late stick embryo stage, the suspensor is most developed.In the globular embryo stage, the suspensor begins to degenerate and its disintegration occurs in the stage of heart embryo.Endosperm is nuclear type.In the stage of about 200~300 free nuclei, endosperm begins to celluarize and its number of cells further increase by mitosis.In the globular embryo stage, the most outer layer of endosperm is specialized to secretory layer.Endosperm cells reserve protein and fat.The most inner layer of single integument is differentiated into endothelium in the stage of 32~64 free nu-clei.After division of zygote, the endothelium fully developed and it is pressed in the late stage of stick embryo.In the globular embryo stage, endo thelium degenerates and the outer layer of integument specialized into seed vessel.

Key words: Eleutherococcus brachypus, Embryo, Endosperm, Endothelium, Development