广西植物2016，Vol.36Issue(10)：1245-1252,8.DOI:10.11931/guihaia.gxzw201507037
凤仙花属棒凤仙亚属（凤仙花科）植物花粉形态的分类学意义
Taxonomic significance of the pollen morphology of subg. Clavicarpa (Impatiens, Balsaminaceae)
摘要
Abstract
Subg. Clavicarpa, the earliest basal taxa of Impatiens, are characterized by perennial herb, more than 5-flowered racemose inflorescence, 4 lateral sepals, hammer-shaped capsule, 4-carpellated ovary with one seed per loculus and 3-colpated pollen grain with trianger polar view. The majority of the subgenus occurred in South China with a few outliers radiated to central China and Indo-China Peninsula. Previous studies indicated that the morphological characters of pollen were valuable in the subdivision of Impatiens but few species involved in subg. Clavicarpa. In this study, pollengrains of 14 species from subg. Clavicarpa were employed and investigated under scanning electron microscope aimed at elucidating their taxomonic value. The results showed that pollen grains of subg. Clavicarpa presented as 3-colpate single grain and triangular or triangular-subcircular in polar view. The exine of pollen was reticulate ornamentation and muri of reticulate ornamentation were smooth or sinuolate towards margin. There were granules in the lumina with different densi-ties. The pollen characters of subg. Clavicarpa were similar to that of Hydrocera. Moreover, morphological traits of pollen were poor in variation pattern and also lack of correlation with gross morphological characters. Therefore, the pollen grain traits could provide limited value in the further division of subg. Clavicarpa but with valuable evidences in circumscrip-tion of species. While some characters of pollen grains, eg. triangle in polar view and three germinal apertures are diag-nostic characters to circumscribe subg. Clavicarpa.关键词
凤仙花科/凤仙花属/棒凤仙亚属/花粉形态/分类学/扫描电镜Key words
Balsaminaceae/Impatiens/subg. Clavicarpa/pollen morphology/systematics/SEM分类
农业科技引用本文复制引用
曾蕾,闫瑞亚,张梅,许为斌,张林静,于胜祥..凤仙花属棒凤仙亚属（凤仙花科）植物花粉形态的分类学意义[J].广西植物,2016,36(10):1245-1252,8.基金项目
国家自然科学基金(31170177)[Supported by the National Natural Science Foundation of China(31170177)]。 （31170177）
