| 红豆杉属叶子的表皮特征与分类的关系 |
| |
| 引用本文： | 桂耀林,胡玉熹.红豆杉属叶子的表皮特征与分类的关系[J].中国科学院研究生院学报,1974,12(3):329-336. |
| |
| 作者姓名： | 桂耀林 胡玉熹 |
| |
| 作者单位： | (中国科学院北京植物研究所) |
| |
| 摘 要： | 本文对我国红豆杉属(Taxus L．)的叶片进行了系统的比较观察，从表皮结构特征讨论了
它与该属各个种分类的关系。
红豆杉属叶片下表皮结构的特征，可以分为三种类型，即：I．乳头状角质钉大而密集，圆
形，遍布于气孔带及中间区；II·乳头状角质钉小而分散，呈圆形或条形，除气孔带及其相邻的
部分表皮细胞有乳头状角质钉以外，中间区有几条长形薄壁细胞明显地不具角质钉；III．乳头
状角质钉的形状基本与类型II同，但在中间区有成片或零星分布的具角质钉的细胞。
由于红豆杉属叶片表皮结构类型并不专一为某一个种所特有，且它们与各个种的外部形
态和地理分布之间存在着重叠与交叉，故以表皮结构类型作为分种的根据常常使该属在种的
划分上带来混乱。因此，红豆杉属表皮的结构类型，在本属各个种的鉴定中只能作为一种辅助的特征，而不应成为定种的唯一根据。
|
Epidermal Feature of the Leaves of Taxus in Relation to Taxonomy |
| |
| Kwei Yao-Lin,Hu Yu-Shi.Epidermal Feature of the Leaves of Taxus in Relation to Taxonomy[J].Journal of the Graduate School of the Chinese Academy of Sciences,1974,12(3):329-336. |
| |
| Authors: | Kwei Yao-Lin Hu Yu-Shi |
| |
| Institution: | (Peking Institute of Botany, Academia Sinica) |
| |
| Abstract: | The comparative observations of the leaves of Chinese Taxus have been made with
special reference to their under epidermal structure of leaves and the under epidermal
feature of leaves in relation to toxonomy of Taxus has been discussed.
The epidermal feature of the under surface of the leaves of Chinese Taxus can be
classified into three types, namely: (I) the strongly papillate cuticular peges present
in median zone of the under surface of the leaves; (II) some files of epidermal cells
in median zone have no papillate cuticular peges and (III) in partial region of the
median zone less strongly developed papillae peges are covered in patches or scattered.
Based upon the fact we may conclude that the under epidermal structure types
of leaves of Chinese Taxus are not characteristic to any speeies of Taxus and parti-
cularly, the morphological characters of leaves and the geographical distribution of
the species are overlapping among different species, thus, the identification of spe-
cies based upon under epidermal structure types may result in obscurity.
Therefore, the under epidermal feature of leaves of Taxus only can be used as
accessory feature for identification of species and it can not be used as an importantcriterion for identification. |
| |
| Keywords: | |
|
| 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 |
