须芒草族植物花粉形态的观察

在光学显微镜下和扫描电镜下对禾本科须芒草族（Ａｎｄｒｏｐｏｇｏｎｅａｅ）中分隶于８个亚族３４个属的３６种植物的花粉进行形态面容和比较研究。结果显示，本族植物花粉形态较为一致，花粉近形或扁球形，单萌发孔，孔，周围加厚，具盖，外壁表面散布有颗粒。这表明其是一个自然类群。总体来讲，芬烨大的演化分异，只是表面纹饰的和芬烨大小有一；定的差异。纹饰可分为三种类型粗糙型，不明显疠状突起才明显疠状突起型。花粉开矿

OBSERVATION ON POLLEN MORPHOLOGY OF THE TRIBE ANDROPOGONEAE (GRAMINEAE)

Pollen morphology of 36 species in 34 genera belonging to 8 subtribes of the tribe Andropogoneae was examined and compared by means of light microscope and scanning electron microscope. Results reveal that the morphology of pollen grains in this tribe is mostly unanimous. The pollen grains are sub-spherical or ellipsoidal with a single operculate aperture surrounded by a raised rim. The surface of exine is interspersed with granules. All these show that it is a natural group. Except for some differences in exine ornamentation and pollen size, there is no great evolutionary divergence among genera in pollen morphology. Based on the ornamentation, the pollen grains in the tribe can be divided into 3 types, namely scabrous,obscurely verrucate and obviously verrucate, which is useful in the research of systematic evolution.