中国鼠李科枣族花粉形态的研究

中国科学院大学学报

中国鼠李科枣族花粉形态的研究

张玉龙, 陈艺林

(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:1986-06-18 发布日期:1986-06-18
通讯作者: 张玉龙

Studies on the Pollen Morphology of Tribe Zizipheae of Rhamnaceae in China

Zhang Yu-Long, Chen Yi-Ling

(Institute of Botany, Academia Sinica)

Received:1900-01-01 Revised:1900-01-01 Online:1986-06-18 Published:1986-06-18
Contact: Zhang Yu-Long

摘要/Abstract

摘要：

本文作者对国产鼠李科枣族6属19种的花粉形态进行了光学显微镜和扫描电镜的观察，根据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属检索表。同时根据花粉形态特征讨论了有关属的分类学上的问题。

关键词: 花粉形态, 鼠李科, 枣族, H形

Abstract:

Pollen morphology of Chinese 19 species representing 6 genera in the tribe

Zizipheae Brongn., Rhamnaceae, was examined under light microscope and scanning electron microscope. The pollen grains oblate or suboblate, rarely subspheroidal. Polar axis 13.1-26.1μm long, equatorial axis 16.5-29.6μm long, 3-colporate, colpus generally narrow, ora lalongate, with two ends connected with the thinned part of exine, forming a H-shape. There are 4 thickenings where colpi and ora pass across, or sometimes the thickenings indistinct, forming a ring. Stratification couspicuous or inconspicuous. Ornamentation of exine obscure, rarely obscurely reticulate under light microscope, but

conspicuously fine-reticulate, finely reticulate-foveolate, foveolate, striate-reticulate and shortly striate under scanning electron microscope.

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

of 6 genera: Paliurus, Ziziphus, Chaydaia, Berchemia, Berchemiella and Rhamnella are

described.

Based on 4 thickenings and H-shape, pollen grains of the tribe Zizipheae may be divided into two groups: 1. the four thickenings rather larger and conspicuous, or stretched along the colpus in some species, H-shape distinct, e.g. in Berchemiella, Chaydaia and Rhamnella, and 2. the four thickenings smaller, sometimes forming a ring, H-shape more or less conspicuous, e.g. in Berchemia, Paliurus and Ziziphus.

With respect to the concept of the genera Berchemiella and Berchemia, there were two different ideas among a number of taxonomists. H. Koidzumi, J. Ohwi and S. Kitamura place the former in Berchemia as a section, but on the contrary, T. Nakai, T. Yamazaki and K. Suessenguth consider Berchemiella and Berchemia as two separate genera. The data from pollen morphology support the latter treatment.

Berchemia is closely related to Berchemiella, Chaydaia and Rhamnella in the habit

and the floral morphology, but differs from the others by its disc well-developed, eularged and becoming cup-shaped in fruit. They are also different from each other in the characters of pollen grains.

T. Yamazaki places the genus Chaydaia in Rhamnella as a section, but according to the pollen morphology to treat Chaydaia and Rhamnella as two independent genera woild be reasonable.

Key words: pollen morphology, Zizipheae, Rhamnaceae, H-shape

张玉龙, 陈艺林. 中国鼠李科枣族花粉形态的研究[J]. 中国科学院大学学报.

Zhang Yu-Long, Chen Yi-Ling. Studies on the Pollen Morphology of Tribe Zizipheae of Rhamnaceae in China[J]. .

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