| 中国冰岛蓼属植物花粉形态的研究 |
| |
| 引用本文： | 周忠泽,张小平,许仁鑫.中国冰岛蓼属植物花粉形态的研究[J].中国科学院研究生院学报,2004,42(6):513-523. |
| |
| 作者姓名： | 周忠泽 张小平 许仁鑫 |
| |
| 作者单位： | 1(安徽大学生命科学学院合肥 230039) 2(安徽师范大学生命科学学院芜湖 241000) |
| |
| 摘 要： | 采用光学显微镜和扫描电镜对国产冰岛蓼属Koenigia L. 9种植物的花粉形态进行了观察。结果表明：花粉均为球形；直径为17.0-32.5 μm（包括刺长）；萌发孔有7(-8)赤道环沟、散沟、散孔；外壁纹饰均为刺状。根据萌发孔类型和外壁纹饰，将该属花粉划分为3种类型，即细冰岛蓼型（Delicatulum-type）、大连线冰岛蓼型（Forrestii-type）及冰岛蓼型（Koenigia-type）。细冰岛蓼型花粉的主要特征是具7(-8)赤道环沟，覆盖层无穿孔，外壁纹饰为显著的长刺状，此种类型的植物有细冰岛蓼K. delicatula （Meisn.） Hara。大连线冰岛蓼型花粉的主要特征是具12散沟，覆盖层无穿孔，外壁纹饰为显著的长刺状，此种类型的植物有大连线冰岛蓼K. forrestii (Diels) Měsíek & Soják 及连线冰岛蓼K. nummularifolia (Meisn.) Měsíek & Soják。冰岛蓼型花粉的主要特征是具15，20(-30)散孔，覆盖层无穿孔，外壁纹饰为显著的长刺状，此种类型的植物有冰岛蓼K. islandica L.、蓝蕊冰岛蓼K. cyanandra (Diels) Měsíek & Soják、线茎冰岛蓼K. nepalensis D. Don、柔毛蓼K. pilosa Maxim.、陕甘蓼K. hubertii (Lingelsh.) Měsíek & Soják及青藏蓼K. fertilis Maxim.。结果表明冰岛蓼属的花粉形态具有重要的分类学意义，研究结果支持Koenigia的属的地位，大铜钱叶蓼Polygonum forrestii Diels和铜钱叶蓼P. nummularifolium Meisn.应从蓼属分叉蓼组Polygonum L. sect. Aconogonon Meisn.中移入冰岛蓼属中，细冰岛蓼、蓝蕊冰岛蓼、青藏蓼、陕甘蓼、线茎冰岛蓼和柔毛蓼应从蓼属头状蓼组Polygonum L. sect. Cephalophilon Meisn.中移入冰岛蓼属中。
|
| 关 键 词： | 花粉形态 冰岛蓼属 蓼科 |
Pollen morphology of Koenigia from China |
| |
| ZHOU Zhong-Ze,ZHANG Xiao-Ping,XU Ren-Xin.Pollen morphology of Koenigia from China[J].Journal of the Graduate School of the Chinese Academy of Sciences,2004,42(6):513-523. |
| |
| Authors: | ZHOU Zhong-Ze ZHANG Xiao-Ping XU Ren-Xin |
| |
| Institution: | 1(School of Life Sciences, Anhui University, Hefei 230039, China) 2(School of Life Sciences, Anhui Normal University, Wuhu 241000, China) |
| |
| Abstract: | Pollen morphology of nine species in Koenigia L. from China was examined under light microscope (LM) and scanning electron microscope (SEM). The pollen grains are 7(-8)-zonocolpate， pantocolpate， or pantoporate in aperture， spheroidal in shape， 17.0-32.5 μm in diameter (including the length of spinules). The ornamentation of exine is prominently spinulose. Based on their features of apertures and exine sculpturing, the pollen grains can be divided into three types， i.e., Delicatulum-type， Forrestii-type and Koenigia-type. The Delicatulum-type is characterized by having 7(-8)-zonocolpate aperture, imperforate tectum and prominently spinulose exine ornamentation. Pollen grains of this type occur in one species， K. delicatula （Meisn.） Hara. The Forrestii-type is characterized by having 12-pantocolpate apertures, imperforate tectum and prominently spinulose exine ornamentation. Pollen grains of this type occur in two species， K. forrestii (Diels) Měsíek & Soják and K. nummularifolia (Meisn.) Měsíek & Soják. The Koenigia-type is characterized by having 15-, 20（-30）-pantoporate apertures, imperforate tectum and prominently spinulose exine ornamentation. Pollen grains of this type occur in six species，K. cyanandra (Diels) Měsíek & Soják，K. fertilis Maxim.，K. hubertii (Lingelsh.) Měsíek & Soják，K. islandica L., K. nepalensis D. Don and K. pilosa Maxim. The present results show that the pollen morphology in Koenigia is of important systematic value. The generic status of Koenigia is supported; Polygonum nummularifolium and P. forrestii may be better transferred to the genus Koenigia from Polygonum sect. Aconogonon Meisn., while P. cyanandrum, P. delicatulum, P. fertile, P. filicaule, P. hubertii, P. pilosum transferred to the genus Koenigia from Polygonum sect. Cephalophilon Meisn. |
| |
| Keywords: | pollen morphology Koenigia 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 |
|
