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Yuriko Takashima
Tokushima Bunri University
7Publications
4H-index
112Citations
Publications 7
Newest
#1Yoshinori Saito (Nagasaki University)H-Index: 12
#2Mayu Ichihara (Tokushima Bunri University)H-Index: 5
Last.Motoo Tori (Tokushima Bunri University)H-Index: 30
view all 8 authors...
Abstract Three natural hybrids and an introgressed individual of Ligularia were evaluated based on a combination of morphology, root chemicals, and nucleotide sequences of evolutionally neutral regions to understand the chemical outcomes of hybridization and introgression. Six previously undescribed eremophilane sesquiterpenes were isolated from hybrids between L. cyathiceps and L. lamarum / L. subspicata , and benzofurans were isolated from L. subspicata for the first time. Their structures wer...
4 CitationsSource
#1Yoshinori Saito (Nagasaki University)H-Index: 12
#2Yuriko Takashima (Tokushima Bunri University)H-Index: 4
Last.Motoo Tori (Tokushima Bunri University)H-Index: 12
view all 7 authors...
1 CitationsSource
#1Yoshinori Saito (Tokushima Bunri University)H-Index: 12
#2Yuriko Takashima (Tokushima Bunri University)H-Index: 4
Last.Chiaki Kuroda (Rikkyo University)H-Index: 20
view all 12 authors...
Source
#1Yoshinori Saito (Tokushima Bunri University)H-Index: 12
#2Yuriko Takashima (Tokushima Bunri University)H-Index: 4
Last.Chiaki Kuroda (Rikkyo University)H-Index: 20
view all 12 authors...
Root chemicals and DNA sequences were analyzed for Ligularia virgaurea collected in the northern Sichuan Province and adjacent areas of China. Thirty-eight samples were found to contain five chemotypes, two known and three new ones. From samples of the new chemotypes, 13 new compounds were isolated, including 3 sesquiterpene dimers and some rearranged eremophilanes. The DNA sequences suggested that the chemotype differentiation had a genetic origin. (C) 2012 Elsevier Ltd. All rights reserved.
25 CitationsSource
#1Yoshinori SaitoH-Index: 12
#2Yuriko TakashimaH-Index: 4
Last.Motoo ToriH-Index: 12
view all 7 authors...
Two new norursane-type triterpenoids were isolated from Dipsacus chinensis (Dipsacaceae) collected in China. The structures were determined based on the spectroscopic data to have enol forms of ene-dione and dione structures in ring A, respectively.
8 CitationsSource
#1Yoshinori Saito (Tokushima Bunri University)H-Index: 12
#2Masato Hattori (Rikkyo University)H-Index: 2
Last.Motoo Tori (Tokushima Bunri University)H-Index: 30
view all 14 authors...
Root chemicals and DNA sequences were analyzed for Ligularia lamarum samples collected in Yunnan and Sichuan Provinces of China and the relationship between the plant and Ligularia subspicata, its taxonomically closest species, was examined. Both species produce furanoeremophilanes and eremophilan-8-one derivatives as the major components. Eleven new compounds, including a new seco-bakkane compound, were isolated. The two species were found to harbor overlapping intra-specific diversities with r...
40 CitationsSource
#1Hajime Nagano (Ochanomizu University)H-Index: 17
#2Atsushi Torihata (Rikkyo University)H-Index: 6
Last.Motoo Tori (Tokushima Bunri University)H-Index: 30
view all 13 authors...
Root chemicals and evolutionarily neutral DNA regions in L. cyathiceps samples collected in the Zhongdian (Shangrila) County of Yunnan, P. R. China, were examined. Twenty compounds were isolated, including three new ones, 1 beta,10 beta-epoxy-6 beta-(propionyloxy)furanoeremophilan-9-one (6), 1 beta,10 beta-epoxy-8 alpha-ethoxyeremophila-6,11-diene (14), and 11 alpha H-6 beta-isobutyryloxy-1 beta,10 beta,7 beta,8 beta-diepoxyeremophilan-12,8 alpha-olide (15). The chemical diversity was found to b...
34 CitationsSource
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