非洲狼尾草胚珠(着重胚珠附器)发育的特点

详细信息

SOME DEVELOPMENTAL FEATURES OF OVULE IN PENNISETUM SQUAMULATUM,WITH EMPHASIS ON EMBELLUM

South China Institute of Botany,The Chinese Academy of Sciences Guangzhou 510650

摘要: 用光学显微镜对非洲狼尾草胚珠发育做了进一步观察,结果表明有如下几个特点:(1)珠孔区域的珠心细胞发生特化,膨大、伸长并进入珠孔,形成胚珠附器。(2)珠心表皮平周分裂产生周缘珠心组织。(3)珠孔由内珠被和腹侧外珠被构成。
- 非洲狼尾草 /
- 胚珠 /
- 胚珠附器 /
- 周缘珠心组织 /
- 珠孔
Abstract: Microstructural study was made on ovule development in Pennisetum squamulatum,and several prominent developmental and structural features were observed as follows:(1) Some nucellar cells become specialized by enlarging,elongating,and protruding into the micropylar canal,forming embellum.(2) There occurs a highly developed prietal nucellar tissue,which is derived from nucellar epidermis.(3) The micropyle is formed with inner integuments and partial outer integument.
- Pennisetum squamulatum /
- Ovule /
- Embellum /
- Prietal nucellar tissue /
- Micropyle