国产省藤属植物的花粉形态学

Pollen Morphology of the Genus Calamus L. from China

摘要:

对国产棕榈科省藤属(CalamusL.)15种植物的花粉进行了光学和扫描电镜观察,其中12种为首次报道。省藤属的花粉均为两沟型花粉,外壁覆盖层多为网状纹饰(大喙省藤C.macrorrhynchus)或具穿孔(华南省藤C.rhabdocladus)。首次发现省藤属花粉的外壁纹饰存在穿孔和外壁疣状突起的类型(阔叶鸡藤C.pulchellus)以及皱波状突起的类型(长鞭省藤C.flagellum)。花粉的大小、形状、外壁纹饰、外壁是否有突起,外壁厚度和网状纹饰网眼的大小,对于省藤属的种级分类有较大的意义。

Abstract:

Pollen morphology of 15 species of genus Calamus (Palmae) from China were studied by means of light microscopy and scanning electronic microscopy. The structures of pollen grains in observed species are of sametype. The apertures is dicolpate, the tectum of exine is reticulate (C. macrorrhynchus) or perforate (C. rhabdocladus).It is the first time that perforate, verrucose (C. pulchellus) and rugulose (C. flagellum) were observed on the exine textum of the genus Calamus. The size, shape and exine ornamentation，verrucose，exine thickness，and the size of lumina in pollen grains are of great significance in the systematics at species level of the genus Calamus．