| 中国蓼属叉分蓼组植物花粉形态的研究 |
| |
| 引用本文： | 周忠泽,陶汉林,班勤,许仁鑫,李玉成.中国蓼属叉分蓼组植物花粉形态的研究[J].中国科学院研究生院学报,2002,40(2):110-124. |
| |
| 作者姓名： | 周忠泽 陶汉林 班勤 许仁鑫 李玉成 |
| |
| 摘 要： | 采用光学显微镜和扫描电镜对中国蓼属叉分蓼组20种3变种的花粉形态进行了观察和研究。结果表明其花粉形态大多数为近球形至近长球形，少数为扁球形或长球形；花粉大小为20.4～44.0µm×17.0～34.0µm：从萌发孔看，有3沟、3 孔沟、多沟、散沟；外壁纹饰为微刺—穴状、刺状、粗网状、皱块状。据此，该组花粉可划分为5种类型，即叉分蓼型(Aconogonon-type)、钟花蓼型(Campanulatum-type)、大连线冰岛蓼型(Forrestii-type)、西伯利亚蓼(Sibiricum-type)及多穗蓼型(Polystachyum-type)，编制了这些花粉类型检索表。叉分蓼型花粉的主要特征是具3沟，外壁纹饰为微刺-穴状，此种类型的植物有14种2变种。钟花蓼型花粉的主要特征是具6散沟，外壁纹饰为微刺-穴状，此种类型的植物有钟花蓼和绒毛钟花蓼。西伯利亚蓼型花粉的主要特征是具3孔沟，外壁纹饰为皱块状，此种类型的植物有西伯利亚蓼。多穗蓼型花粉的主要特征是具6(~8)多沟，外壁纹饰为粗网状，此种类型的植物有松林蓼及多穗蓼。大连线冰岛蓼型花粉的主要特征是具散沟，外壁纹饰为显著的长刺状，此种类型的植物有大铜钱叶蓼及铜钱叶蓼，结果表明叉分蓼组的花粉形态具有重要的分类学意义，研究结果支持将叉分蓼组上升为属的等级，也支持Knorringia的属的地位，大铜钱叶蓼和铜钱叶蓼应移入Koenigia属中，而松林蓼和多穗蓼仍保留在蓼属中。
|
| 关 键 词： | 花粉形态 叉分蓼组 蓼科 中国 |
Pollen morphology of Polygonum section Aconogonon Meisn. in China |
| |
| ZHOU Zhong-Ze,TAO Han-Lin,BAN Qin,XU Ren-Xin,LI Yu-Cheng.Pollen morphology of Polygonum section Aconogonon Meisn. in China[J].Journal of the Graduate School of the Chinese Academy of Sciences,2002,40(2):110-124. |
| |
| Authors: | ZHOU Zhong-Ze TAO Han-Lin BAN Qin XU Ren-Xin LI Yu-Cheng |
| |
| Abstract: | Pollen morohology of 20 species and three varieties in Polygonum seet. Aconogonon Meisn. (Polygonaceae) in China was examined under light microscope (LM) and scanning electron microscope (SEM). The pollen grains are 3-colpate, 3-colporate, polyplicate, or pantocolpate in shape, 20.4 ~ 44.0 µm x 17.0 ~ 34.0 µm, mostly spheroidal to subprolate, rarely oblate-spheroidal or prolate (P/E = 1.06 ~ 1.40). The ornamentation of exine is microspinulose-foveolate, prominently spinulose, coarsely reticulate, or rugulate under SEM. Based on their features of the apertures and the exine sculpturing, the pollen grains can be divided into 5 types, i.e. Aconogonontype, Campanulatum-type, Sibiricum-type, Polystachyum-type and Forrestii-type. A key to the pollen types was provided. The Acontogonon-type is characterized by being 3-zonocolpate and having an imperforate tectum with the microspinulose-foveolate ornamentation. Pollen grains of this type occur in 14 species and two varieties, i.e.P. ajanense, P. alpinum, P. angustifolium, P.cathayanum, P. coriarium, P. divaricatum, P. hookeri, P. lichiangense, P. limosum, P.molle, P. molle var. frondosum, P. molle var. rude, P. ocreatum, P. songaricum, P. tibeticum, P. tortuosum. The Campanulatum-type is characterized by being 6-pantocolpate and having an imperforate tectum with the microspinulose-foveolate ornamentation. Pollen grains of this type occur in two taxa, P. campanulatum and P. campanulatum var. fulvidum. The Sibiricum-type is characterized by being 3-zonocolporate and having a rugulate ornamentation. Pollen grains of this type occur in one species, P. sibiricum. The Polystachyum-type is characterized by being 6( ~ 8)-zonocolpate and having a coarsely reticulate exine ornamentation. Pollen grains of this type occur in two species, P. pinetorum and P. polystachyum. The Forrestii-type is characterized by being 12-pantocolpate and having a prominently spinulose exine ornamentation. Pollen grains of this type occur in two species, P. forrestii Diels and P. nummularifolium. The present results show that the pollen morphology in sect. Aconogonon is of important systematic value. The treatment of this section as an independent genus and the generic status of Knorringia are supported; Polygonum nummularifolium and P. forrestii may be better transferred to the genus Koenigia, while P. pinetorum and P. polystachyum retained in the genus Polygonum. |
| |
| Keywords: | Pollen morphology Polygonum sect Aconogonon Polygonaceae China |
|
| 点击此处可从《中国科学院研究生院学报》浏览原始摘要信息 |
| 点击此处可从《中国科学院研究生院学报》下载免费的PDF全文 |
|
