| 国产肉苁蓉属(列当科)花粉及种皮的形态研究 |
| |
| 引用本文： | 张志耘.国产肉苁蓉属(列当科)花粉及种皮的形态研究[J].中国科学院研究生院学报,1990,28(4):294-298. |
| |
| 作者姓名： | 张志耘 |
| |
| 作者单位： | (中国科学院植物研究所系统与进化植物学开放研究实验室，北京100093) |
| |
| 摘 要： | 本文借助扫描电镜，对国产肉苁蓉属Cistanche植物的花粉外壁及种皮纹饰进行了观察，并讨
论了它们的分类学意义。结果表明：该属各个种之间在花粉外壁纹饰及种皮纹饰上的差异可为种的区 分提供依据。
|
| 关 键 词： | 肉苁蓉属 花粉形态 种皮 |
Studies on the Pollen Morphology and Seed Coat of the Genus Cistanche (Orobanchaceae) in China |
| |
| Zhang Zhi-Yun.Studies on the Pollen Morphology and Seed Coat of the Genus Cistanche (Orobanchaceae) in China[J].Journal of the Graduate School of the Chinese Academy of Sciences,1990,28(4):294-298. |
| |
| Authors: | Zhang Zhi-Yun |
| |
| Abstract: | In the present paper pollen grains of 5 species and seed coat of 4 species of the
genus Cistanche (Orobanchaceae) from China were examined by scanning electron microscope
As a result, two types of the pollen exine sculpture are distinguished: (1) tuberculate, C. salsa
and C. lanzhouensis; (2) rugulate or fine reticulation formed by the fusion of rugae, C.
sinensis, C. deserticola and C. tubulosa. Chinese Cistanche was classified into two sections
based on the gross morphology by the present author (Zhang, 1984). C. lanzhouensis and
C. sinensis were included in one section. This classification is in conflict with the pollen type,
which indicates that the characters of pollen grains and external morphology in this genus have
evolved at different rates. The differences in pollen morphology of Chinese Cistanche can serve
as characters for delimitating species.
According to our abservation, C. lanzhouenis Z. Y. Zhang differs from the other members
of Cistanche not only in external morphology but also in pollen morphology. Pollen grains
are subprolate in this species, while prolate in the other four species, and exine sculpture is
tuberculate. The present study provides the establishment of this new species (Zhang, 1984)
with palynological evidence.
The seed coat sculpture in Chinese Cistanche are constantly alveolate, but there are some
slight differences, by which the sculpture can be divided into two types: (1) testa cells have
or have not thickenings on the inner anticlinal walls; cavernulous sculpture is present on
outer periclinal wall of some cells: C. sinensis; (2) testa cells have striate thickenings on the
inner anticlinal walls: C. salsa, C. deserticola and C. tubulosa. The characters of seed coatof some significance for the delimitation of species. |
| |
| Keywords: | Cistanche pollen morphology seed coat |
|
| 点击此处可从《中国科学院研究生院学报》浏览原始摘要信息 |
| 点击此处可从《中国科学院研究生院学报》下载免费的PDF全文 |
|
