Pollen morphology of Androsace （Primulaceae） and its systematic implications  

作　　者：Yuan Xu Chi-Ming Hu Gang Hao 

机构地区：[1]College of Life Sciences, South China Agricultural University, Guangzhou 510642, China [2]South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China

出　　处：《Journal of Systematics and Evolution》2016年第1期48-64,共17页植物分类学报（英文版）

基　　金：Acknowledgements We thank IBSC, PE, and US for herbarium materials, Wei-Tao Jin and Nan-Cai Pei for collecting pollen samples, and Xiao- Ying Hu for technical assistance. We also thank James Doyle and Editor Sean Graham for their valuable comments. This study was financially supported by the National Natural Science Foundation of China （Grant No. 31270260）.

摘　　要：A close relationship between Androsace and related genera （Douglasia, Vitaliana, and Pomatosace） has long been recognized. Recent molecular studies have provided abundant evidence that Douglasia, Vitaliana, and Pomatosace are nested within Androsace and together constitute the monophyletic ＂Androsace group＂. We investigated the pollen morphology of 80 taxa representing all sections of Androsace s.s. as traditionally construed, as well as Douglasia, Vitaliana, and Pomatosace, to see whether they are congruent with phylogenetic relationships. We uncovered subtle variation in pollen morphology within the group. The shape of pollen grains ranges from spheroidal to perprolate. Pollen size ranges from 9.37 μm in Androsace sect. Samuelia to 20.68 μm in Douglasia. Exine ornamentation includes rnicroreticulate, microechinate, perforate, and rugulate types. The polar view varies from circular, triangular and planaperturate, to triangular and angulaperturate. Various pollen morphological characters support the monophyly of major clades, IMegista, which were recognized previously based on including ]Septentrionalis, /Pomatosace, /Orthocaulon, and molecular evidence.A close relationship between Androsace and related genera （Douglasia, Vitaliana, and Pomatosace） has long been recognized. Recent molecular studies have provided abundant evidence that Douglasia, Vitaliana, and Pomatosace are nested within Androsace and together constitute the monophyletic ＂Androsace group＂. We investigated the pollen morphology of 80 taxa representing all sections of Androsace s.s. as traditionally construed, as well as Douglasia, Vitaliana, and Pomatosace, to see whether they are congruent with phylogenetic relationships. We uncovered subtle variation in pollen morphology within the group. The shape of pollen grains ranges from spheroidal to perprolate. Pollen size ranges from 9.37 μm in Androsace sect. Samuelia to 20.68 μm in Douglasia. Exine ornamentation includes rnicroreticulate, microechinate, perforate, and rugulate types. The polar view varies from circular, triangular and planaperturate, to triangular and angulaperturate. Various pollen morphological characters support the monophyly of major clades, IMegista, which were recognized previously based on including ]Septentrionalis, /Pomatosace, /Orthocaulon, and molecular evidence.

关 键 词：Androsace Doulasia pollen morphology Pomatosace SEM SYSTEMATICS Vitaliana. 

分 类 号：Q94[生物学—植物学]