欢迎访问中国科学院大学学报,今天是

中国科学院大学学报

• • 上一篇    下一篇

南水青冈属及壳斗科其他属花粉壁超微结构比较研究

郑中华,王萍莉,溥发鼎   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-05-10 发布日期:1999-05-10
  • 通讯作者: 郑中华

A Comparative study on pollen exine ultrastructure of Nothofagus and the other genera of Fagaceae

ZHENG Zhong-Hua, WANG Ping-Li, PU Fa-Ding   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-05-10 Published:1999-05-10
  • Contact: ZHENG Zhong-Hua

摘要:

对主要分布于南美和新西兰的南水青冈属Nothofagus 花粉外壁的超微结构进行了观察和研究,
同时与壳斗科其他属花粉外壁的结构进行比较,结果表明,南水青冈属花粉外壁的厚度、结构、萌发孔类
型以及花粉外壁表面的纹饰与壳斗科其他属花粉外壁的超微结构存在明显差别。主要表现为:南水青
冈属花粉外壁的柱状层和内层发育差,为颗粒状;基层和覆盖层无分化结构;覆盖层上为刺状纹饰;萌发
孔为5~8沟。壳斗科其他属花粉外壁的小柱发育好,形成明显的柱状层;覆盖层和基层常具一定的结
构;花粉表面较光滑,或为波状、颗粒或瘤状纹饰;内层发育较好;多数花粉具3孔沟,少数为3沟或3拟
孔沟。本研究认为南水青冈属花粉外壁的结构属于较原始类型,支持kuprianova等将南水青冈属独立
为南壳斗科。

关键词: 南水青冈属, 壳斗科, 花粉外壁, 超微结构

Abstract:

The genus Nothofagus is mainly distributed in South America and New Zealand.
The present paper describes its pollen exine ultrastructure and compares the exine ultrastruc-
ture with that of the other genera of Fagaceae. The pollen grains were examined using ultra-
thin sectioning technique under transmission electron microscope. The study shows that the
pollen exine ultrastructure of Nothofagus differs from that of the other genera of Fagaceae by
its exine structure and thickness, type of aperture, and ornamentation. The pollen exine of
Nothofagus is thin and possesses granular bacules, regular foot layer and tectum, spinulate
ornamentation, and the endexine is usually visible at poral area, and 5~8 colpate. The pollen
exine of the other genera of Fagaceae possesses entire bacules, irregular foot layer and tec-
tum, granulate and tuberculate ornamentation, thicker endexine, and is 3-colporate ( 3-colpate
or 3-colporoidate). The pollen exine ultrastructure of Nothofagus may belong to primitive
type. The pollen exine ultrastructure data support Kuprianova’s opinion that Nothofagus
should be separated from Fagaceae and established as a monogenetic family, i.e. Nothofa-
gaceae.

Key words: Nothofagus, Fagaceae, Pollen exine, Ultrastructure