A new lignan, together with a known one, was isolated from Isodon lophanthoides var. gerardianus [Bentham] H. Hara. The structure of the new lignan was elucidated as 1_acetoxyl_2e_piperonyl_6e_[6_methoxyl_pi...A new lignan, together with a known one, was isolated from Isodon lophanthoides var. gerardianus [Bentham] H. Hara. The structure of the new lignan was elucidated as 1_acetoxyl_2e_piperonyl_6e_[6_methoxyl_piperonyl]_3,7_dioxabicyclo_[3,3,0]_octane mainly by 1D and 2D NMR techniques.展开更多
[ Objective] This study aimed to conduct the karyotype analysis of Rabdosia lophanthoides var. gerardians and R. lophanthoides Hara var. gracilifloruschromosomes. [ Method] Vigorously growing shoot tips of R. lophanth...[ Objective] This study aimed to conduct the karyotype analysis of Rabdosia lophanthoides var. gerardians and R. lophanthoides Hara var. gracilifloruschromosomes. [ Method] Vigorously growing shoot tips of R. lophanthoides var. gerardianus and R. lophanthoides Hara var. graciliflorus were stained for section preparation to observe and analyze the chromosomes. [ Result] Karyotype formula of R. lophanthoides var. gerardianus is K （2n） =2x =24 = 18m ＋4Sm, sugges- ting that this species belongs to category 2A of Stebbins; karyotype formula of R. lophanthoides Hara var. graciliflorus is K （2n） =2x =24 = 16m ＋8Sm, sugges- ting that this species belongs to category 1B of Stebbins. [Conclusion] R. lophanthoides var. gerardianus is more primitive compared with R. lophanthoides Hara var. graciliflorus.展开更多
文摘A new lignan, together with a known one, was isolated from Isodon lophanthoides var. gerardianus [Bentham] H. Hara. The structure of the new lignan was elucidated as 1_acetoxyl_2e_piperonyl_6e_[6_methoxyl_piperonyl]_3,7_dioxabicyclo_[3,3,0]_octane mainly by 1D and 2D NMR techniques.
文摘[ Objective] This study aimed to conduct the karyotype analysis of Rabdosia lophanthoides var. gerardians and R. lophanthoides Hara var. gracilifloruschromosomes. [ Method] Vigorously growing shoot tips of R. lophanthoides var. gerardianus and R. lophanthoides Hara var. graciliflorus were stained for section preparation to observe and analyze the chromosomes. [ Result] Karyotype formula of R. lophanthoides var. gerardianus is K （2n） =2x =24 = 18m ＋4Sm, sugges- ting that this species belongs to category 2A of Stebbins; karyotype formula of R. lophanthoides Hara var. graciliflorus is K （2n） =2x =24 = 16m ＋8Sm, sugges- ting that this species belongs to category 1B of Stebbins. [Conclusion] R. lophanthoides var. gerardianus is more primitive compared with R. lophanthoides Hara var. graciliflorus.
