Knowledge Management System of Northwest Institute of Plateau Biology, CAS
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
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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/363003/45816 |
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). |
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