中国南五味子属植物花粉形态的研究

本文用光学显微镜和扫描电子显微镜研究了国产南五味子属2个组7种花粉,记述了它们的形态,讨论了该属花粉形态的特征。该属花粉异极六沟,是属的鉴别上的一个重要特征,其中三条沟常在一极汇合成三合沟,本文报道亦有四合沟的现象,认为具合沟的一极是远极。南五味子属Kadsura Kaempf.ex Juss.集中分布于东亚至东南亚,约有24种,我国种类最为丰富,已知有13种,大都为药用经济植物。本属植物的花粉形态在国内尚未见有报道,本文试图通过对本属广布种和我国一些特有种的花粉形态的观察,探讨这个属花粉形态的特征,并与其他有关类群的花粉比较,给植物分类提供依据,为解决某些争议性问题提供资料,同时提出作者的观点。

POLLEN MORPHOLOGY OF THE GENUS KADSURA FROM CHINA

The pollen grains of seven species in the genus Kadsura from China are examined by using the light and scanning electron microscope. The pollen grains are unique in being heteropolar with 6 colpi meridionally arranged. Usually, three are long and the other three are short; the longer ones met together and fused at one of the poles to form a triradiate mark; but sometimes, four furrows met together and fused at one of the poles as observed in K. heteroclita. All six furrows end evenly around the area at the blank pole. The convergent pole is presumed distal-polar. All the furrows are linear, each with a median thickening of the furrow membrane. The exine is reticu-lately sculptured.