华夏齿叶叶表皮构造的研究

中国科学院大学学报

华夏齿叶叶表皮构造的研究

刘照华,耿宝印,崔金钟,李承森

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-07-10 发布日期:1998-07-10
通讯作者: 刘照华

Studies on the Epidermal Structure of Tingia carbonica

LIU Zhao-Hua, GENG Bao-Yin, CUI Jin-Zhong, LI Cheng-Sen

Received:1900-01-01 Revised:1900-01-01 Online:1998-07-10 Published:1998-07-10
Contact: LIU Zhao-Hua

摘要/Abstract

摘要：

通过研究采自内蒙古准格尔旗早二叠世山西组的华夏齿叶Tingia carbonica的标本，首次揭示

了该植物叶表皮构造。表皮为单面气孔式，表皮细胞呈不规则长方形。气孔器属多细胞类型中的无规则型，排列稀疏、近散生，气孔长椭圆形，保卫细胞周围具5～6个表皮细胞。依据表皮特征对该种植物的分类、生态方面的问题进行了探讨。

关键词: 齿叶属, 华夏齿叶, 叶表皮构造, 山西组

Abstract:

Two leafy specimens of Tingia carbonica were collected as impression from

Shanxi formation of Permian, from Inner Mongolia, China. The epidermal structure of its

leaves is reported in this paper. Under SEM, well preserved epidermal cells as well as some

concaves on the surface of large leaves were clearly recognized. The epidermal cells are ap-

proximately rectangular in shape, about 100～150 um long and 20～30 um wide. They are

arranged longitudinally parallel to veins. The concaves usually in rows are round or elliptical,

about 0.65～0.35 mm long and 0.2～0.35 mm wide. Density of concaves is about 1.8/

mm² and no stomata occur inside the concaves. In all probability, this is the upper epidermis. On the other side of the epidermis, anomocytic stomata are scattered irregularly, each

with 5～6 epidermal cells around. The stomatal apertures are about 35.8 µm long, and 18.7

um wide, which is organised parallel to the common epidermal cells. As far as shape and size

is concerned, it is similar to that described on the upper epidermis. Density of the stomata is

about 60/mm². In all Probability, this is the lower epidermis. The ecological preference and

classification of Tingia are discussed according to these new characters of the epidermis and

subordinate struture of the leaf.

Key words: Tingia, Tingia carbonica, epidermis, Shanxi Formation

刘照华,耿宝印,崔金钟,李承森. 华夏齿叶叶表皮构造的研究[J]. 中国科学院大学学报.

LIU Zhao-Hua, GENG Bao-Yin, CUI Jin-Zhong, LI Cheng-Sen. Studies on the Epidermal Structure of Tingia carbonica[J]. .