红花玉兰等5个玉兰种花粉形态观察及分类学意义

通过对红花玉兰（Magnolia wufengensis L. Y. Ma et L. R. Wang）等5个玉兰种的花粉的光学显微镜和扫描电子显微镜观察拍照，测量光学显微镜下的花粉大小并对其进行统计学分析。结果表明：光学显微镜下，木兰属5个种的花粉均呈现椭圆形或近圆形，各种之间大小、形状方面有较大差异，种内部也存在不同程度的差异；扫描电子显微镜下，各种花粉均为舟形，且具有闭合、长及两端的远极萌发单沟等一致特征，花粉表面纹饰、突起等特征在种内部比较稳定，不同种之间差异明显，可以为木兰属植物种的划分提供比较准确的依据。

Taxonomy Significance Based on Pollen Morphology Observation of Five Species of Magnolia L. Including Magnolia wufengensis L. Y. Ma et L. R. Wang

Pollens of 5 species of Magnolia were observed and screened with light microscope(LM) and scanning electron microscope(SEM) respectively; pollen size were measured under LM; and the metrical results were analyzed. The results show that under the LM all pollen appear as oval or close to rotundity, but these species are different in size and shape, and also the distinctions exist in different trees of same species; while under SEM, all the pollens appear as boats, every pollen has a closed sprout channel whose length almost equal to the longer axis of pollen, the characters of pollen surfaces are steadily in same species, but there are some visible differences among pollen of different species and these differences can provide important morphologic basis for classification of species of Magnolia L