| 中国蕨类植物孢子形态的研究 Ⅱ. 中国蕨科 |
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| 引用本文： | 于晶,王全喜,包文美.中国蕨类植物孢子形态的研究 Ⅱ. 中国蕨科[J].中国科学院研究生院学报,2001,39(3):224-233. |
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| 作者姓名： | 于晶 王全喜 包文美 |
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| 摘 要： | 利用扫描电镜对国产中国蕨科Sinopteridaceae植物9属61种6变种的孢子进行了观察。结果表明，该科植物的孢子可分为3种类型：(1)孢子球形，三裂缝；周壁较厚，疏松地包在孢子之外；外壁光滑，表面纹饰由周壁形成，呈网状、嵴状、刺状或皱状。除金粉蕨属Onychium和珠蕨属Cryptogramma外，该科其他属的植物都具此类型孢子。(2)孢子钝三角形，三裂缝；周壁较薄，由周壁和外壁共同形成表面轮廓，表面具疣状或颗粒状纹饰。具此类型孢子的只有珠蕨属。(3)孢子钝三角形，三裂缝，沿裂缝两侧各有一脊状隆起或瘤状纹饰；周壁薄，由外壁形成表面纹饰的基本轮廓；具赤道环、近极脊和远极脊。具此类型孢子的只有金粉蕨属。另外，从孢粉学的角度对该科的分类和系统演化进行了探讨。
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| 关 键 词： | 蕨类植物 孢子形态 中国蕨科 中国 |
Spore morphology of pteridophytes from China Ⅱ. Sinopteridaceae |
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| YU Jing,WANG Quan-Xi,BAO Wen-Mei.Spore morphology of pteridophytes from China Ⅱ. Sinopteridaceae[J].Journal of the Graduate School of the Chinese Academy of Sciences,2001,39(3):224-233. |
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| Authors: | YU Jing WANG Quan-Xi BAO Wen-Mei |
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| Abstract: | Spores of 61 species and 6 varieties in 9 genera of the Sinopteridaceae were examined
under scanning electron microscope (SEM). Based on surface ornamentation and other features, the
spores of the Sinopteridaceae are divided into three types. In type Ⅰ , the exospore is smooth and
the surface ornamentation, which is reticulate, cristate, echinate or rugate, is formed by the peris-
pore. All the other genera of this family, except for Onychium and Cryptogramma, have this pat-
tern of spores. In type Ⅱ, the surface ornamentation is formed by both perispore and exospore. This
pattern is found only in Cryptogramma. In type Ⅲ, the perispore is thin and the surface ornamenta-
tion is formed by the exospore. Onychium is characterized by this type of spores. Those genera with
spores of type Ⅰ of the Sinopteridaceae seem to be closely related to each other and should be natu-
ral members of this family. The systematic position of Cryptogramma and Onychium, with spores of
type Ⅱ and type Ⅲ respectively, however, should be reconsidered. Aleuritopteris might be the mostprimitive member of the Sinopteridaceae from the evidence of spore morphology. |
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| Keywords: | Pteridophyte Spore morphology Sinopteridaceae China |
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