中国蓼科花粉萌发孔的平行进化(英文)

Parallel Evolution of Aperture Numbers and Arrangement of Polygonaceae in China

利用光学显微镜和扫描电镜对蓼科１２ 属１１１ 种的花粉进行了观察和研究，划分出２８ 个花粉类型，对每个类型做了精确的描述和评价；提供了每个花粉类型的重要鉴别特征．根据花粉的萌发孔、外壁结构、外壁纹饰、形状及大小的演化趋势，讨论了各类型花粉的亲缘关系，构建了它们的系统演化路线图谱．该项研究不仅为化石花粉的研究提供了鉴定依据，而且为中国蓼科孢粉地理学的研究提供了理论基础．

Pollen material from dried specimens was obtained from the followng herbaria: ANU, ANUB, N, NAS. Pollen of 111 species representing 12 genera was examined in the light microscope (LM) and with the scanning electron microscope (SEM).Pollen descriptions are given for 28 types based on pollen shape,aperture numbers and arrangement, and the ornamentation of exine. The 28 pollen types of Polygonaceae in China have been arranged in their evolutionary sequence. Evolutionary trends of pollen types of Polygonaceae in China have six parallel directions .