| 三尖杉属植物叶片结构的比较观察 |
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| 引用本文： | 胡玉熹.三尖杉属植物叶片结构的比较观察[J].中国科学院研究生院学报,1984,22(4):289-296. |
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| 作者姓名： | 胡玉熹 |
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| 作者单位： | (中国科学院植物研究所，北京) |
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| 摘 要： | 本文作者在光学显微镜与扫描电子显微镜下，比较观察了三尖杉属植物叶片构造与叶
表面角质层的特征。
观察结果表明，篦子三尖杉的气孔为双环型，少数为单环型, 单位面积上的气孔平均数较
多(120．6个／mm2), 具皮下层, 叶肉中含有大量丝状石细胞和少量星状石细胞及短石细胞, 叶
下表面角质突起不明显。而三尖杉属的其余种类，气孔均为双环型，气孔平均数较少(47．3一
88．1个／mm2), 除日本粗榧与柱冠日本粗榧外，均无皮下层, 叶肉中具星状石细胞、短石细
胞、纤维状石细胞或完全缺如, 叶下表面具明显的角质突起。依据上述特征以及大体形态和生
物碱成分等有关资料，我们建议在三尖杉属中可分为： 三尖杉组(Sect．Cephalotaxus)和篦子
三尖杉组(Sect．Pectinatae)。 此外，本文还对三尖杉组中的分系与某些种的划分，以及三尖杉科的系统位置进行了讨论。
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| 关 键 词： | 三尖杉属 叶子解剖 石细胞 角质突起 系统发育 |
Comparative Anatomy of the Leaves of Cephalotaxus (Cephalotaxaceae) |
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| Hu Yu-Shi.Comparative Anatomy of the Leaves of Cephalotaxus (Cephalotaxaceae)[J].Journal of the Graduate School of the Chinese Academy of Sciences,1984,22(4):289-296. |
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| Authors: | Hu Yu-Shi |
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| Institution: | (Institute of Botany, Academia Sinica, Beijing) |
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| Abstract: | The internal structure and cuticular characters of the leaves of Cephalota-
xus were investigated under light microscope and scanning electron microscope. The
materials used belong to 9 species, 2 varieties and 1 cultivar.
The leaf characters of C. oliveri Mast. are as follows: stomata are amphicyclic
and occasionally monocyclic, the stomatal frequency is 120.6/mm2, the hypodermis is
present, there are a large number of filiform sclereids and a few brachysclereids and
astrosclereids in the mesophyll, the cuticular projections on the lower surfaces are in-
distinct. This species differs from all the other species of Cephalotaxus, in which
stomata are amphicyclic only, the stomatal frequency is 47.3-88.1/mm2, hypodermis
is absent except in C. harringtonia and C. harringtonia cv. ‘Fastigiata’, foliar astroscle-
reids, hrachysclereids asd fibriform selereids may be present or entirely absent, there
are distinct cuticular projections on the lower surface. Based upon the above-mentioned
features, the gross morphology as well as the alkaloids. Cephalotaxus may be divided
into two sections, namely: Sect. Cephalotaxus and Sect. Pectinatae.
In addition, also discussed are following problems: the classification of some species
in Sect. Cephalotaxus, the suggested subdivision of Sect. Cephalotaxus into 4 series,
and the systematic position of Cephalotaxaceae. |
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| Keywords: | Cephalotaxus leaf anatomy sclereid cuticular projection phylogeny |
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