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19 results on '"Tori M"'

16. Chemical constituents of hybrids of Ligularia cyathiceps and L. lamarum/L. subspicata collected in China: Structures of subspicatins M, N, O 1 , and O 2 , and related compounds.

Author

Saito Y, Ichihara M, Takashima Y, Okamoto Y, Gong X, Hanai R, Kuroda C, and Tori M

Subjects
Asteraceae genetics, Base Sequence, Benzofurans isolation & purification, China, DNA, Plant genetics, Metabolome, Molecular Structure, Plant Roots chemistry, Sesquiterpenes isolation & purification, Asteraceae chemistry, Benzofurans chemistry, Hybridization, Genetic, Sesquiterpenes chemistry
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 were elucidated based on spectroscopic analyses. Some compounds produced by hybrids have not been detected in either parental species, indicating that the metabolic profile was altered by hybridization and introgression., (Copyright © 2017 Elsevier Ltd. All rights reserved.)

Published
2017
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17. Chemical and genetic similarity and diversity of Ligularia anoleuca and L. fischeri collected in the Hengduan Mountains of China.

Author

Shimizu A, Suzuki Y, Hanai R, Okamoto Y, Tori M, Gong X, and Kuroda C

Subjects
Base Sequence, China, Molecular Conformation, Plant Roots chemistry, Plant Roots genetics, Sequence Analysis, DNA, Sesquiterpenes isolation & purification, Asteraceae chemistry, Asteraceae genetics, DNA, Plant chemistry, DNA, Plant genetics, Sesquiterpenes chemistry
Abstract

The sesquiterpenoid composition in the root and the DNA sequences of evolutionarily neutral regions were studied in Ligularia anoleuca and Ligularia fischeri (Asteraceae) collected in the Sichuan Province of China. LC-MS analysis showed that L. anoleuca populations from different localities had different chemical compositions. However, the isolated compounds were similar to each other, indicating that the differences in chemical composition were not large. The DNA analysis suggested that the two species were indistinguishable. Seventeen furanoeremophilanes and an eremophilane acetal were isolated., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

Published
2014
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18. Chemical and genetic diversity of Cremanthodium lineare.

Author

Saito Y, Ichihara M, Takiguchi K, Tanio Y, Okamoto Y, Hanai R, Kuroda C, Kawahara T, Gong X, and Tori M

Subjects
Asteraceae classification, Base Sequence, Drugs, Chinese Herbal chemistry, Drugs, Chinese Herbal classification, Genetic Variation, Molecular Structure, Nuclear Magnetic Resonance, Biomolecular, Plant Roots chemistry, Plant Roots genetics, Sequence Analysis, DNA, Sesquiterpenes chemistry, Asteraceae chemistry, Asteraceae genetics, Drugs, Chinese Herbal isolation & purification, Sesquiterpenes isolation & purification
Abstract

Chemical constituents and evolutionally neutral DNA sequences of six samples of Cremanthodium lineare Maxim., collected in the Sichuan Province of China, were studied. Three samples produced furanoeremophilanes and the other three, eremophilan-8-ones. The chemotypes were found to be correlated with DNA sequence types, suggesting that the chemical diversity observed has a genetic origin. Production of furanoeremophilanes by a Cremanthodium species suggests an evolutionary relationship between Cremanthodium and Ligularia species, and possibly to related genera., (Copyright © 2013 Elsevier Ltd. All rights reserved.)

Published
2013
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19. Chemical and genetic diversity of Ligularia vellerea in Yunnan, China.

Author

Tori M, Nakamizo H, Mihara K, Sato M, Okamoto Y, Nakashima K, Tanaka M, Saito Y, Sono M, Gong X, Shen Y, Hanai R, and Kuroda C

Subjects
China, Molecular Conformation, Naphthalenes isolation & purification, Plant Roots chemistry, Plant Roots genetics, Polycyclic Sesquiterpenes, Sequence Analysis, DNA methods, Sesquiterpenes isolation & purification, Species Specificity, Stereoisomerism, Asteraceae chemistry, Asteraceae genetics, Genetic Variation, Naphthalenes chemistry, Sesquiterpenes chemistry
Abstract

Intra-specific diversity in Liularia vellerea growing in the northwestern to central Yunnan province of China was studied by chemical and genetic approaches. Samples collected in the Jianchuan, Lijiang, and Zhongdian areas contained 6,15-dioxygenated furanoeremophilanes as their major components (type A); whereas samples from the Luguhu area accumulated 1,6-dioxygenated furanoeremophilanes (type B); a sample from near Kunming, however, contained 6,15-dioxygenated eremophilanolides (type C). 11 beta H- and 11 alpha H-6 beta-angeloyloxy-15-carboxyeremophil-7-en-12,8-olides (eremofarfugins D and E) were also isolated and their structures were determined. A correlation between the composition and the DNA sequence was observed in the ITSs.

Published
2008
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