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| 水鳖科9属15种植物花粉形态的研究 | |
| 引用本文： | 孙坤,陈家宽,张志耘.水鳖科9属15种植物花粉形态的研究[J].植物分类学报,2002,40(6):490-500. |
| 作者姓名： | 孙坤 陈家宽 张志耘 |
| 作者单位： | 1. 西北师范大学植物研究所,兰州,730070 2. 复旦大学生物多样性科学研究所,上海,200433 3. 中国科学院植物研究所系统与进化植物学重点实验室,北京,100093 |
| 基金项目： | 国家自然科学基金 ( 3980 0 0 0 8)，西北师范大学知识与科技创新工程基金 ( 0 2 )资助。 |
| 摘 要： | 应用光学显微镜、扫描电镜和透射电镜对水鳖科Hydrocharitaceae 9属15种植物的花粉形态进行
了观察。水鳖科植物花粉为圆球形至近椭球形，无萌发孔或偶为单沟萌发孔，外壁纹饰通常为小刺状纹
饰，刺密集或稀疏，花粉表面具瘤状、疣状、颗粒状、皱波状突起或光滑。外壁由覆盖层、柱状层和基层组
成。覆盖层厚或较薄，柱状层小柱发育不明显，基层薄。水鳖科植物在花粉大小、纹饰类型、刺的长短、
密度、形态、萌发孔的有无以及花粉壁的结构等方面表现出了较为明显的差异，这些特征对探讨类群间
关系具有较重要意义。由于黑藻属Hydrilla和Stratiotes属花粉较为特殊，支持将它们各自作为一个独立
的族处理。水鳖科植物花粉外壁纹饰和结构特点表明该科与水雍科Aponogetonaceae、泽泻科Alismataceae
和花蔺科Butomaceae等近缘，而该科植物花粉大多无萌发孔等则反应了该科与茨藻目Najadales植物有密切联系。 |
| 关 键 词： | 水鳖科 花粉形态 系统学 |
| 修稿时间： | 2002年6月3日 |
Pollen morphology of 15 species in nine genera of the Hydrocharitaceae |
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| SUN Kun,CHEN Jia_Kuan,ZHANG Zhi_Yun.Pollen morphology of 15 species in nine genera of the Hydrocharitaceae[J].Acta Phytotaxonomica Sinica,2002,40(6):490-500. | |
| Authors: | SUN Kun CHEN Jia_Kuan ZHANG Zhi_Yun |
| Affiliation: | SUN Kun1 CHEN Jia_Kuan2 ZHANG Zhi_Yun3* 1 |
| Abstract: | Pollen morphology of 15 species in nine genera of Hydrocharitaceae was examined with light microscope (LM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The pollen grains are usually inaperturate, spheroidal to subellipsoidal in shape, but those of Stratiotes aloides and Halophila ovalis are monosulcate. The ornamentation of exine is spinulose with tuberculae, verrucae, granules or rugulae on pollen surface under SEM. The exine is composed of three indistinct layers, e.g. tectum, columellae and foot layer, but the columellae are only slightly developed. Some characters, such as the size of pollen grain, shape and length of spinules and wall structure are of some systematic value. The treatment of Stratiotes and Hydrilla as independent tribes respectively is supported. The ornamentation and structure of exine in the Hydrocharitaceae are similar to those in the Alismataceae, Aponogetonaceae and Butomaceae, but the presence of inaperturate pollen grains in most taxa of Hydrocharitaceae shows its affinity with Najadales. |
| Keywords: | Hydrocharitaceae Pollen morphology Systematics |
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