中国鼠李族花粉形态的研究

中国科学院大学学报

中国鼠李族花粉形态的研究

张玉龙, 陈艺林

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1992-01-18 发布日期:1992-01-18
通讯作者: 张玉龙

A Study on Pollen Morphology of Tribe Rhamneae (Rhamnaceae)in China

Zhang Yu-Long, Chen Yi-Ling

Received:1900-01-01 Revised:1900-01-01 Online:1992-01-18 Published:1992-01-18
Contact: Zhang Yu-Long

摘要/Abstract

摘要：

本文对国产鼠李科鼠李族5属25种的花粉形态进行了光学显微镜和扫描电镜的观察，并观察了

乌苏里鼠李的外壁超微结构。根据花粉大小、孔沟交界处四块加厚的程度和所形成的H形明显与否以及纹饰的不同作出了分类检索表，同时根据花粉形态特征认为把鼠李属的裸芽亚属和鳞芽亚属分立成为两个独立的属是比较适宜的。

关键词: 花粉形态, 鼠李科, 鼠李族

Abstract:

Pollen morphology of 25 Chinese species, representing 6 five genera in the tribe

Rhamneae of Rhamnaceae, was examined under LM and SEM. Pollen grains are

subspheroidal or suboblate, obtuse-triangular in polar view, 3-colporate, with the polar axis

(P)10.4-28.7μm long and equatorial axis (E) 11.3-30.5μm long, P/E = 0.81-1.11. Colpi

generally narrow and long, ora lalongate, with two ends connected with the thinned part of

exine, forming a H-shape. Four thickenings were observed where colpi and ora cross, but

sometimes the thickenings were indistinct or formed a ring. The stratification indistinct. The

ornamentation of exine obscure or indistinctly reticulate under LM, but rugulose,

short-striate, rugulose-foveolate or reticulate under SEM.

The exine ultrastructure of Rhamnus ussuriensis was examined under TEM. It consists of

imperforate tectum, granular layer, foot layer and endexine. The tectum is rather thick with

uneven surface, while the granular layer is rather thin.

A key to the genera based on pollen characteristics is provided and the general

pollenmorphology of five genera, i.e. Sageretia, Rhamnus, Hovenia, Colubrina and Alphitonia,

is described respectively.

Based on pollen size, the four thickenings and the ornamentation, the five genera under

study may be distinguished from each other. For example, pollen grains are smaller in

Sageretia; the four thickenings are larger and distinct in Hovenia and Alphitonia. However,

the ornamentation is short-striate under SEM in Hovenia and Alphitonia, while reticulate in

the Colubrina and Rhamnus ( Subgen. Rhamnus) .Two different concepts of Rhamnus exist

among taxonomists. Heppeler and Suessenguth divided Rhamnus into two subgenera

(Subgen. Frangula and Subgen. Rhamnus), whereas Grubov separated Subgen. Frangula

from Rhamnus as an independent genus. According to the pollen morphology, the separation

is reasonable.

Key words: Pollen morphology, Rhamnaceae, Rhamneae

张玉龙, 陈艺林. 中国鼠李族花粉形态的研究[J]. 中国科学院大学学报.

Zhang Yu-Long, Chen Yi-Ling. A Study on Pollen Morphology of Tribe Rhamneae (Rhamnaceae)in China[J]. .

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