| Autor: |
Hanai, Ryo, Gong, Xun, Tori, Motoo, Kondo, Satomi, Otose, Kanako, Okamoto, Yasuko, Nishihama, Tadaaki, Murota, Akihiko, Shen, Yuemao, Wu, Sugong, Kuroda, Chiaki |
| Zdroj: |
Bulletin of the Chemical Society of Japan; July 2005, Vol. 78 Issue: 7 p1302-1308, 7p |
| Abstrakt: |
Three Ligulariaspecies (L. tongolensis, L. cymbulifera, and L. atroviolacea) were examined with respect to the chemical composition and nucleotide sequence. Furanoeremophilanes were found to be produced in the root of all samples of the three species collected in northwest Yunnan and southwest Sichuan. Eight furanoeremophilanes were identified, two of which were new. Most of the identified furanoeremophilanes were oxygenated at 3, 6, and 15-positions. The nucleotide sequence of the atpB-rbcLintergenic region was found to be essentially the same in the three species. These similarities imply that the three Ligulariaspecies, all belonging to the section Corymbosae, are close to one another. The intra-specific diversity in the two widely distributed species in the Hengduan Mountains area, L. tongolensisand L. cymbulifera, were in contrast. Four out of 19 L. tongolensissamples contained a strongly Ehrlich-positive compound besides a number of positive compounds, and five variants of the atpB-rbcLsequence were found in these samples. In contrast, no variation was observed in 13 L. cymbuliferasamples with respect to the furanoeremophilane composition or the atpB-rbcLsequence. The lack of diversity in L. cymbuliferaprobably resulted from the uniformity of its habitat. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
