南水青冈属花粉形态类型及其分类学意义

中国科学院大学学报 ›› 2000, Vol. 38 ›› Issue (5): 452-461.

南水青冈属花粉形态类型及其分类学意义

王萍莉,溥发鼎,郑中华

收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2000-09-10
通讯作者: 王萍莉

Pollen morphology of the genus Nothofagus and its taxonomic significance

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

Received:1900-01-01 Revised:1900-01-01 Published:2000-09-10
Contact: WANG Ping-Li

摘要/Abstract

摘要：

采用光学显微镜、扫描电镜及透射电镜，对分布于南美洲、澳大利亚、新西兰、新喀里多尼亚岛和新几内亚岛的南水青冈属Nothofagus26种2变种，包括33份花粉材料，进行了观察测定及超微结构分析研究。通过对花粉的形状、大小、萌发孔特征的比较分析，得出以下结果：南水青冈属花粉粒为扁球形至超扁球形；萌发孔具5～8短沟，稀为4沟或9沟，沟缘普遍加厚；表面具不同形状、大小和疏密的刺状纹饰，花粉外壁超微结构与壳斗科(狭义)其它属迥然不同。研究结果表明，该类群的花粉在形状、大小、沟的数目和沟缘加厚等特征上亦具较大差异，据此可划分为3种类型，即N ．brassii型，N．menziesii型和N．fusca型。

关键词: 壳斗科, 南水青冈属, 花粉类型

Abstract:

The present paper describes the pollen morphology of 26 species and 2 varieties in

Nothofagus from Australia, New Zealand, New Caledonia, New Guinea and South America. Pollen

grains were all examined with light microscope (LM), scanning electron microscope ( SEM ) and

transmission electron microscope(TEM). A comparative analysis of pollen exine ultrastructure was

made for some species. The results are summarised as follows: Pollen grains are oblate to peroblate,

5～8-short-colpate, rarely 4- or 9-colpate; colpi generally thickened at margins; pollen surface

spinulose. The exine ultrastructure of Nothofagus differs considerably from that of the other genera

in the Fagaceae. The pollen grains of the species examined here show great differences in shape,

size, colpal number and characteristics of colpi at margins and could be divided into three distinct

types, i.e. N. brassii type; N. menziesii type and N. fusca type.

Key words: Fagaceae, Nothofagus, Pollen type

王萍莉,溥发鼎,郑中华. 南水青冈属花粉形态类型及其分类学意义[J]. 中国科学院大学学报, 2000, 38(5): 452-461.

WANG Ping-Li, PU Fa-Ting, ZHENG Zhong-Hua. Pollen morphology of the genus Nothofagus and its taxonomic significance[J]. , 2000, 38(5): 452-461.