Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China

NWIPB OpenIR

	Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China
	Yang, MH ; Zhang, DM ; Zheng, JH ; Liu, JQ
	2001
发表期刊	NORDIC JOURNAL OF BOTANY ; Yang Meihua, Zhang Daming, Zheng Junhua, Liu Jianquan.Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China.NORDIC JOURNAL OF BOTANY,2001,21(4):411-418
摘要	Pollen morphology of 40 species of Rheum, belonging to eight sections, was investigated under LM and SEM. Four new exine patterns were found in the species: a) microcchinate-foveolate, b) rugulate, c) verrucate-perforate, and d) verrucaterugulate ornamentation. In addition, two patterns, the Rheum-type pollens with microechinate-perforate and fine-reticulate, as previously described, were also confirmed in the present study. Based on above study the evolution trends of pollen morphology in the taxa involved were discussed phylogenetically as below. As microechinate-perforate exine pattern existed commonly, the pattern is, therefore, regarded as the most primitive among all the six types. The fine-reticulate type was thought as a derivative type, deriving from the basic micro echinate-foveolate-perforate pattern, and followed by the rugulate and verrucate-perforate ornamentation. The verrucate-rugulate ornamentation should be the most advanced. More than one pollen type often exist in most of the sections in Rheum. The pollen morphology of Rheum was strongly correlated with its geographical and ecological distribution. Three medicinally important species R. officinale, R. palmation and R. tanguticum can be palynologically distinguished by their ornamentations.; Pollen morphology of 40 species of Rheum, belonging to eight sections, was investigated under LM and SEM. Four new exine patterns were found in the species: a) microcchinate-foveolate, b) rugulate, c) verrucate-perforate, and d) verrucaterugulate ornamentation. In addition, two patterns, the Rheum-type pollens with microechinate-perforate and fine-reticulate, as previously described, were also confirmed in the present study. Based on above study the evolution trends of pollen morphology in the taxa involved were discussed phylogenetically as below. As microechinate-perforate exine pattern existed commonly, the pattern is, therefore, regarded as the most primitive among all the six types. The fine-reticulate type was thought as a derivative type, deriving from the basic micro echinate-foveolate-perforate pattern, and followed by the rugulate and verrucate-perforate ornamentation. The verrucate-rugulate ornamentation should be the most advanced. More than one pollen type often exist in most of the sections in Rheum. The pollen morphology of Rheum was strongly correlated with its geographical and ecological distribution. Three medicinally important species R. officinale, R. palmation and R. tanguticum can be palynologically distinguished by their ornamentations.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/55976
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yang, MH,Zhang, DM,Zheng, JH,et al. Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China[J]. NORDIC JOURNAL OF BOTANY, Yang Meihua, Zhang Daming, Zheng Junhua, Liu Jianquan.Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China.NORDIC JOURNAL OF BOTANY,2001,21(4):411-418,2001.
APA	Yang, MH,Zhang, DM,Zheng, JH,&Liu, JQ.(2001).Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China.NORDIC JOURNAL OF BOTANY.
MLA	Yang, MH,et al."Pollen morphology and its in systematic and ecological significance in Rheum (Polygonaceae) from China".NORDIC JOURNAL OF BOTANY (2001).