【摘要】 通过光学显微镜和扫描电镜观察了前胡属 Peucedanum L.7种植物的花粉形态 .研究结果表明 :该属花粉为三棱长球形 ;三孔沟 ,边孔 ;外壁两层 ,层次分明 .根据花粉形态可归为 :矩形型和赤道收缩形型二个类型 ,其演化趋势为矩形型→赤道收缩形型 .研究结果支持了关于前胡属在伞形科中是一个较自然和较进化的类群的观点 .本文从孢粉学角度还初步分析了该属的属下系统 ,为该属的系统学研究提供基础资料更多还原

【Abstract】 In the present paper, pollen morphology of 7 species of the genus Peucedanum from Sichuan was investigated. Pollen grains of all the species were examined by LM,SEM. Among them 4 species were palynologically reported here for the first time. The study showed that pollen grains of Peucedanum in vary shape. Their framework was trigonal in solid form, tricolporate, pleurotreme and exine 2-lauered. The statification of exine was clear. According to the characteristics of the pollen grains in Peucedanum, it may be divided into clearly distinguished types: Rectangular type and Equatorially→constricted type. The evolutionary trends of pollen types were as follows: rectangular type-equatorial-constricted type. Pollen information supports that Peucedanum as an advanced taxon in Umbelliferae. According to the pollen information, the authors primarily analysized the pollen grains of the Sect. in Peucedanum, which provided some basical materials for the systematic studies of Peucedanum.更多还原