紫草亚科附地菜族的花粉形态研究

本文用光学显微镜和扫描电子显微镜系统观察了附地菜族5个属26种植物花粉形态。五属是附地菜属、车前紫草属、滨紫草属、山茄子属和皿果草属。观察证明属间花粉形态有明显的差异。花粉资料为族内属的划分和皿果草属的建立提出了花粉学证据。

POLLEN MORPHOLOGY OF TRIGONOTIDEAE

The present paper deals with studies of the pollen morphology of the tribe Trigonotideae (Boragidaceac-Boraginoi-deae), containing five genera, i. e. Trigonotis, Brachybotrys, Sinojohnstonia, Omphalotrigonotis and Mertensia. The pollen grains of 26 species belonging to these genera respectively were examined with the light microscope and scanning electron microscope. The pollen morphology of the genera in question is distinctly different between each other and may furnish valuable characters for distinguishing them and for supporting the establishment of the new genus, Omphalotrigonotis, An analytical key to the pollen grains of the five genere is as follows:1. Pollen grains dumbbellform in equatorial view, more or less constricted in equatorial region, tricolporate and tripseudocolpate. 2. Pollen grains the smallest in the tribe Trigonotideae. exine almost psilate…………………………Trigonotis Stey. 2. Pollen grains larger, exine with ornamentations. 3. Exine foveolate…………………………Sinojohnstonia Hu 3. Exine fillely granulate or spinulate. 4. Exine finely granulate…………………………Mertensia Roth. 4. Exine spinulate…………………………Blachybotrys Maxim. ex Oliv. 1. Pollen grains rhombic in equatorial view and not constricuted in equatorial region, tricolporate, not pseudocolpate. exine finely reticulate…………………………Omphalotrigonotis W. T. Wang.