试论花粉形态在种内变异的意义

On Significances of Intraspecific Variation in Pollen Morphology

本文论述了被子植物9科13属27种植物花粉形态在种内的变异.指出花粉形态种内变异在被子植物某些类群内客观存在,尽管变异的程度和方式因种而异,并认为染色体在种内的变异是花粉形态变异的细胞学基础,在同一个植物复合体中染色体数目和倍性的差异都导致其花粉形态不同程度的相应变化.花粉形态的种内变异不仅对认识变异本身有一定的意义,而且对植物分类学和系统进化的研究也十分重要.

The intraspecific variations of 27 species which belong to 9 famillies of angiosperm were discussed in the paper.The existence of intraspecific variation of pollen morphology is objective in some taxons of an- giosperm,although the ways and degrees of variation vary from species to species.Some species contain dif- ferent kinds of apertural type pollen grains,but others contain relative uniform pollen grains.The intraspe- cific variations of chromosome numbers and ploidy levels are cytological basis of the intraspecific variation in pollen morphology.The differences of chromosome number and ploidy level influence the characteristies of pollen morphology in a plant complex.The significances of studying intraspecific variation in pollen mor- phology were discussed,and it was considered that the studying intraspecific variation of pollen morphology has significance not only to recognize the variation itself,but aslo to study the implication of pollen morphol- ogy on taxonomy and systematics.