| 中国罗汉松科花粉形态研究 |
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| 引用本文： | 席以珍.中国罗汉松科花粉形态研究[J].中国科学院研究生院学报,1986,24(6):434-438. |
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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： | 本文用光学显微镜，结合扫描电镜和透射电镜对我国罗汉松科podocarpaceae植物花粉外壁的细微结构做了深入的研究，对比了我国仅有的两属花粉的形态特征，同时与形态上相似的松科花粉进行了比较，指出了它们之间的区别。
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| 关 键 词： | 花粉形态 罗汉松科 罗汉松属 陆钧松属 超微结构 |
Studies on Pollen Morphology of Podocarpaceae from China |
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| Xi Yi-Zhen.Studies on Pollen Morphology of Podocarpaceae from China[J].Journal of the Graduate School of the Chinese Academy of Sciences,1986,24(6):434-438. |
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| Authors: | Xi Yi-Zhen |
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| Institution: | (Institute of Botany, Academic Sinica, Beijing) |
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| Abstract: | The pollen morphology and ultrastructure of exine of Podocarpaceae in China
were examined with light microscope, scanning electron microscope and transmission electron
microscope. The pollen grains of Podocarpus have rather large and prominent sacs on both
sides of body, and are 53.9-74.8 μm long in total, with their bodies 29.6-45.2 μm long and
19.1-31.3 μm wide. The sacs are smooth on outer surface with perforation, but reticulate insi-
de. On distal view, they are obviously of radial muri from its base. The body is oblate or
spheroidal, laddershaped on distal face. The exine of the capis tuberculate, but more distinct-
ly on the margin than in the centre. The pollen grains of Dacrydium are of small and indis-
tinct sacs around body, which are composed of many small bladders. The body is subcircular
in outline. Both body and sacs are irrugulate tuberculate under SEM. Examination of thin
sections of Podocarpus macrophyllus var. maki with TEM reveals that the exine includes ecte-
xine and endexine. It is interesting to note that foot layer of ectexine possesses lamellar stru
cture, but endexine is homogeneous in structure and lighter in colour. This character is speci-
fic in the gymnosperms. Based on informations of fossil pollen grains, Podocarpaceae is rather primitive and of ancient origin. |
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| Keywords: | Pollen morphology Podocarpaceae Podocarpus Dacrydium Ultrastructure |
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