- 著者
- Takayuki Mizuno Haruka Seto Takahisa Nakane Yoshinori Murai Fumi Tatsuzawa Tsukasa Iwashina
- 出版者
- National Museum of Nature and Sciece (National Science Museum, Tokyo)
- 雑誌
- 国立科学博物館研究報告B類(植物学) (ISSN:18819060)
- 巻号頁・発行日
- vol.49, no.2, pp.57-64, 2023-05-22 (Released:2023-05-22)
- 参考文献数
- 25
One anthocyanin and three flavones were isolated from the flowers of Tripora divaricata (Lamiaceae). They were identified as delphinidin 3-O-[(6″′-E-p-coumaroylglucosyl)-(1→2)-(6″-E-p-coumaroylglucoside)]-5-O-(6″′-malonylglucoside), apigenin 7-O-glucuronide, scutellarein 4′-methyl ether 7-O-glucuronide, and acacetin 7-O-glucuronide. In addition, we measured absorption spectra of intact petal and the buffer solutions (pH 5.6) containing isolated compounds for elucidation of the blue violet color development in T. divaricata. The absorption spectral curve of the buffer solution containing isolated anthocyanin showed the blue violet. Its color was identical to that of the intact flowers. These results indicate that the intramolecular copigmentation of anthocyanin mainly occurred in the blue violet flowers of T. divaricata.
- 著者
- Yoshinori Murai Koh Nakamura
- 出版者
- National Museum of Nature and Sciece (National Science Museum, Tokyo)
- 雑誌
- 国立科学博物館研究報告B類(植物学) (ISSN:18819060)
- 巻号頁・発行日
- vol.48, no.3, pp.95-100, 2022-08-22 (Released:2022-08-22)
- 参考文献数
- 16
Phenolic compounds in the leaves of Hedysarum vicioides, an alpine plant widely distributed in Japan, were surveyed. Four flavonol glycosides, quercetin 3-O-robinobioside, 3-O-rutinoside, 3-O-galactoside and 3-O-glucoside, and a xanthone glycoside, mangiferin were identified. Both types of phenolic compounds possess UV absorbing and antioxidant properties. The overall content of phenolic compounds decreased when the plants cultivated in a growth chamber and a glasshouse, compared to plants grown in their native habitat. Under cultivated conditions, the decrease of quercetin glycosides was particularly marked. Furthermore, we also extracted components from the specimens and compared the composition of the plant with that of another congeneric species distributed in Japan, and found the differences between the two species. We describe the chemotaxonomic and ecological significance of the isolated compounds.