中国芸苔属植物花粉形态的研究

本文对我国芸苔属Brassica Linn．36种(含变种、变型)植物的花粉形态首次作了系统报道。用光 学显微镜进行观察，发现该属花粉有四种沟孔类型。即二、三、四沟；三沟；三、四沟，三、四孔沟。多数种类与以往的报道不完全相同。在扫描电镜下，纹饰为三种类型。拟脑纹-网状；网纹状；穴-网纹状。依据 植物花粉形态和其它特征，对本属植物演变趋势和一些种，变种的分类处理进行了讨论。

Studies on the Pollen Morphology of the Genus Brassica (Cruciferae) in China

The present paper reports the pollen morphology of 36 species and varieties of Brassica L. in China mostly for the first time. They were examined both under LM and SEM. Pollen grains of Brassica L. in China are long-spheroidal,  subspheroidal,  spheriodal,  oblate, rarely reniformis or subsquare.  According to the aperture characters pollen grains may   be divided into four types:  2,3,4-colpate,  3-colpate, 3,4-colpate, 3,4-colporate.  The exine scul- pture may also be divided into three types: 1, reticulate, 2, cerebroid-reticulate, 3, foveolate- reticulate.  Detailed characters of pollen grains for each taxon are presented in Table 1. The 2,3,4-colpate type of pollen grains may be considered as primitive one and the 3,4-colpate or 3,4-colporate type of pollen grains is the most advanced in Brassica.  The tricolpate aperture and reticulate exine have been reported by the previous authors, whereas, 3,4-colporate and ce- rebroid-reticulate or foveolate-reticulate pollen grains are newly reported.