中国苦苣苔科唇柱苣苔属花粉形态研究及其系统学意义

摘要

本文对中国苦苣苔科唇柱苣苔属14种花粉形态进行了扫描电镜观察.花粉均具三拟孔沟,形状大多为近扁球形,少数为球形或长球形,极面观大多为近三角形,少数为近圆形、圆形或三裂圆形,赤道面观大多为近圆形,少数为圆形或椭圆形.研究表明:唇柱苣苔属在系、组不同分类水平上,各种类的花粉在大小、花粉沟特征和表面纹饰等方面有一定的差别,此结果与唇柱苣苔属下的组系分类是基本一致的.%Morphological Studies of pollen of fourteen species of genus Chirita (Gesneriaceae) in China are reported inthis paper. The pollen grains of genus Chirita are tricolporoidate, mostly suboblate, rarely spheroidal or prolate in shape,mostly subangular, rarely subcircular, circular or lobate - circular in polar view and mostly subround, rarely round or oblongin equatorial view. The study shows that pollen varies in size, colpus characteristics and ornamentation among species, se-ries, and sections in genus Chirita. Results in this study are coincident with classification of genus Chirita at section and se-ries levels.