大血藤科花粉形态及外壁超微结构的研究

对大血藤科及木通科的八月瓜属ＨｏｌｂｏｅｌｌｉａＷａｌｌ．和木通属ＡｋｅｂｉａＤｅｃｎｅ花粉进行了光镜及电子显微镜的观察研究。研究结果表明，其花粉形态具有较为明显的相似性，如花粉均为３沟，外壁表面具穴状纹饰，甚至大小也很近似。但从其外壁结构看，大血藤花粉的外壁内层为结均一的致密层组成

POLLEN MORPHOLOGY AND WALL ULTRUSTRUCTURE OF SARGENTODOXACEAE

In this paper, the pollen of Sargentodoxa,Akebia and Holboellia has been examined by LM,SEM and TEM. The result showed that the pollen of three genera stated above is similar fundamentally in shape,size,aperture type and even sculpture. However,as far as the structure of pollen wall is concerned,Sargentodoxa is different to some extent from those of Akebia and Holboellia by having endexine which consists of a solid and homogeneous(unifoim) layer, but the endexine ofAkebia and Holboellia consists of an inner lamellar or plate-like unit and an outer sol-id unit.Based on pollen morphology especially the pollen wall ultrastructure and other characters such as fruit and ovular number,the authors support that Sargentodoxa be treated as a separate family Sargentodoxaceae.