| 中国红豆杉科花粉形态的研究 |
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| 引用本文： | 席以珍.中国红豆杉科花粉形态的研究[J].中国科学院研究生院学报,1986,24(4):247-252. |
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| 作者姓名： | 席以珍 |
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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： | 红豆杉科(Taxaceae)，花粉近球形，有时稍扁或稍长。直径为20．8-45．8μm。具远极 薄壁区，或不典型的乳头状突起。外壁两层，内外层厚度相等，有时层次不明显。在光学显微 镜下，外壁表面粗糙，或具微弱的颗粒状纹饰。在穗花杉(Amentotaxus argotaenia)这个种里，有些花粉粒具残存气囊。在扫描电镜下，外壁表面具粗瘤和细瘤两种纹饰类型。透射电镜本科各属代表种观察表明，本科花粉外壁内层具片状结构，外层由单层瘤状纹饰分子构成，有 些种细瘤连接形成覆盖层。根据花粉形态资料，可将本科植物分为2个族： 白豆杉族(仅包括白豆杉一个属)和红豆杉族(包括红豆杉属和榧树属)。 鉴于穗花杉属花粉的特殊性，建议独立上升为穗花杉科Amentotaxaceae。
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Studies on Pollen Morphology of Taxaceae of China |
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| Xi Yi-Zhen.Studies on Pollen Morphology of Taxaceae of China[J].Journal of the Graduate School of the Chinese Academy of Sciences,1986,24(4):247-252. |
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| Authors: | Xi Yi-Zhen |
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| Institution: | (Institute of Botany, Academia Sinica, Beijing) |
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| Abstract: | The present study deals with pollen morphology of 4 genera and l0 species
of Taxaceae in gymnosperms. Pollen grains of the family are spheroidal or subsphe-
roidal, 20.8μm in diameter and with laptoma or papilla in the distal face. Exine is
two-layered, with sexine equal to nexine in thickness, but sometimes the stratification is
indistinct. The surface is scabrous or slightly granular under LM. Coarse verrucae and
fine tuberculae on pollen surface are observed under SEM. From thin section, ende-
xine is shown to have lamellate structure, and ectexine is made of verrucate elements.
In Amentotaxus argotaenia, some pollen grains show remnant saccate.
According to pollen morphology, this family may be divided into two tribes: 1,
Pseudotaxeae (including Pseudotaxus only), and 2, Taxeae (including Taxus and Torre-
ya). Owirg to the special feature of pollen grains in Amentotaxus the present author
suggests that the genus be separated from Taxaceae and raised to the level of family,
Amentotaxaceae. |
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| Keywords: | Pollen morphology Taxaceae Taxonomy China |
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