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采用扫描电镜观察了中国华南地区报春苣苔属43种植物的花粉形态,并对其花粉形态进行了聚类分析,基于孢粉学聚类结果,并结合形态学特征以及供试物种的地理分布特征,从多个角度联合探讨其分类学意义。结果显示:(1)报春苣苔属43种植物花粉粒为较小到中等大小类型,均为三沟花粉粒;花粉粒形状从圆球形到超长球形,以长球形为主要形态;花粉粒极面观形状为圆状三角形、圆形和3裂圆形;外壁纹饰均为网状纹饰,绝大多数为宽网脊。(2)孢粉学聚类结果将43种植物划分为6个组7个类型,初步表明该属植物的花部大小和颜色是多起源进化而来的,根据分布区域的比较,该属的物种形成可能和适应华南喀斯特特殊地貌与小环境的形成有密切关系。
Scanning electron microscopy was used to observe the pollen morphology of 43 species of the genus Zephyranthes in southern China. The pollen morphology was analyzed by cluster analysis. Based on the results of palynological clustering, morphological characteristics and the geographical features of the tested species Distribution characteristics, from multiple angles to explore its taxonomic significance. The results showed as follows: (1) The pollen grains of 43 plants of the genus Primula were genotypes of small to medium size, all of which were in SanGou pollen grains. The shape of the pollen grains varied from spherical to ultra-long spherical, Particle surface shape of a round triangle, round and 3 crack round; outer decoration are reticular ornamentation, the vast majority of wide web. (2) The results of palynology clustering divided 43 species into 6 groups and 7 types, which indicated that the flower size and color of this genus evolved from multiple origins. According to the distribution area comparison, Species formation may be closely related to the formation of the special landscape and small environment of karst in South China.