独叶草花粉形态的研究及其在分类上的意义

中国科学院大学学报

独叶草花粉形态的研究及其在分类上的意义

张玉龙

(中国科学院植物研究所)

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1983-11-18 发布日期:1983-11-18
通讯作者: 张玉龙

Pollen Morphology of Kingdonia uniflora and Its Taxonomic Significance

Zhang Yu-Long

(Institute of Botany, Academia Sinica)

Received:1900-01-01 Revised:1900-01-01 Online:1983-11-18 Published:1983-11-18
Contact: Zhang Yu-Long

摘要/Abstract

摘要：

独叶草 (Kingdonia uniflora Balfour f．et W．W．Smith) 为我国特有植物，

由于它的开放的二叉分枝叶脉，引起了植物学家的很大兴趣和广泛注意，并从

各个方面对它进行了研究。关于它的花粉形态，除Forster(1961)曾有过简短

描述外，国内外都未研究过。本文对它的花粉形态进行了系统的研究，通过光学

显微镜、扫描电镜和透射电镜观察了它的外部形态和外壁结构。并讨论了有关

分类问题。

Abstract:

Kingdonia uniflora Balfour f. et W. W. Smith is endemic to China. Pollen grains of this species were examined under light microscope and scanning electron microscope, and the structure of exine under transmission electron microscope.

The pollen grains are tricolpate, prolate or subprolate, 27.8-35.7μ× 23.5-29.6μ. There are some granules on the colpus membranes. The exine is semitectate, striato-reticulate, and 2-layered, with distinct tectum and columllae. According to Walker's idea about pollen evolution in primitive angiosperms, the pollen of the genus does not seem to be primitive.

Forster (1961) considers the pollen of Kingdonia as tricolporate, but it is tricolpate in our observation. Some taxonomists (Wang, 1957, 1980, Hutchison, 1937) put this genus in Ranunculaceae, but Forster (1961) treated it as an independent family. Pollen morphology supports placing Kindgonia in Ranunculaceae, because tricolpate type of pollen is one of the principal pollen types in the family. According to Zhang (1982), chromosomes of Kingdonia are similar to those of the genus Coptis. The genus under discussion was then removed from Trib. Anemoneae (Subfam. Ranunculoideae) into Subfam. Thalictroideae as a new tribe (Trib. Kingdonieae W. T. Wang et C. Y. Chang). But pollen grains of Coptis are generally pantoporate, and thus more advanced than those of Kingdonia.

张玉龙. 独叶草花粉形态的研究及其在分类上的意义[J]. 中国科学院大学学报.

Zhang Yu-Long. Pollen Morphology of Kingdonia uniflora and Its Taxonomic Significance[J]. .