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41 results on '"Mukasa, Yuji"'

9. Characterization of Peroxidase in Tartary Buckwheat Seed

Author

SUZUKI, Tatsuro, primary, SHIN, Dong-Hoon, additional, WOO, Sun-Hee, additional, MUKASA, Yuji, additional, MORISHITA, Toshikazu, additional, NODA, Takahiro, additional, TAKIGAWA, Shigenobu, additional, HASHIMOTO, Naoto, additional, YAMAUCHI, Hiroaki, additional, and MATSUURA-ENDO, Chie, additional

Published
2012
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11. Characteristics and inheritance of the semidwarf mutants of Tartary buckwheat (Fagopyrum tataricum Gaertn.) induced by gamma ray and ion beam irradiation

Author

Morishita, Toshikazu, primary, Mukasa, Yuji, additional, Suzuki, Tatsuro, additional, Shimizu, Akemi, additional, Yamaguchi, Hiroyasu, additional, Degi, Konosuke, additional, Aii, Jotaro, additional, Hase, Yoshihiro, additional, Shikazono, Naoya, additional, Tanaka, Atsushi, additional, Miyazawa, Yutaka, additional, Hayashi, Yoriko, additional, and Abe, Tomoko, additional

Published
2010
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14. Time−Course Study and Effects of Drying Method on Concentrations of γ-Aminobutyric Acid, Flavonoids, Anthocyanin, and 2′′-Hydroxynicotianamine in Leaves of Buckwheats

Author

Suzuki, Tatsuro, primary, Watanabe, Masami, additional, Iki, Makiko, additional, Aoyagi, Yasuo, additional, Kim, Sun-Ju, additional, Mukasa, Yuji, additional, Yokota, Satoshi, additional, Takigawa, Shigenobu, additional, Hashimoto, Naoto, additional, Noda, Takahiro, additional, Yamauchi, Hiroaki, additional, and Matsuura-Endo, Chie, additional

Published
2008
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15. Structural Identification of Anthocyanins and Analysis of Concentrations during Growth and Flowering in Buckwheat (Fagopyrum esculentum Moench) Petals

Author

Suzuki, Tatsuro, primary, Kim, Sun-Ju, additional, Mohamed, Zaidul Islam Sarker, additional, Mukasa, Yuji, additional, Takigawa, Shigenobu, additional, Matsuura-Endo, Chie, additional, Yamauchi, Hiroaki, additional, Hashimoto, Naoto, additional, Noda, Takahiro, additional, and Saito, Tatsuya, additional

Published
2007
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38. Possible Roles of Methyl Glucoside andMyo-inositol in the Opening of Cut Rose Flowers.

Author

ICHIMURA, KAZUO, MUKASA, YUJI, FUJIWARA, TAKAHIRO, KOHATA, KATSUNORI, GOTO, RIE, and SUTO, KENICHI

Subjects
GLUCOSIDES, ROSES, INOSITOL, FLOWERS, CARBOHYDRATES
Abstract

Methyl glucoside andmyo-inositol are present in all organs of rose (Rosa hybridaL.). To investigate the possible role of these carbohydrates in the opening of cut roses, flowers with a 10, 20 or 40-cm-long stem and a single flower bud (about 1.5 cm in diameter) were placed in water and flower opening and changes in sugar content in flowers and stems examined for 7 d. The longer the stem of the cut flower, the larger was the flower diameter. In stems, the concentration of carbohydrates, including methyl glucoside andmyo-inositol markedly decreased before flower opening. In petals, contents of glucose, methyl glucoside andmyo-inositol also decreased before flower opening, but those of fructose, sucrose and xylose did not. When glucose and methyl glucoside were added to the vase water (4%) flower opening was clearly promoted; this was accompanied by an increase in methyl glucoside and fructose concentrations in petals. On the contrary,myo-inositol inhibited flower opening, and this was accompanied by an increase inmyo-inositol and xylose concentrations in petals. These results suggest that methyl glucoside and/or its metabolites are transported into the petal cells, thereby lowering the osmotic water potential and promoting flower opening.Myo-inositol is not readily metabolized, and exogenousmyo-inositol given at a high concentration may act as an extracellular osmolyte, which inhibits water uptake and flower opening.Copyright 1999 Annals of Botany Company [ABSTRACT FROM AUTHOR]

Published
1999
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39. Identification of L-Bornesitol and Changes in Its Content during Flower Bud Development in Sweet Pea (Lathyrus odoratusL.)

Author

ICHIMURA, Kazuo, KOHATA, Katsunori, MUKASA, Yuji, YAMAGUCHI, Yuichi, GOTO, Rie, and SUTO, Kenichi

Abstract

An unidentified carbohydrate was isolated from sweet pea (Lathyrus odoratusL. cv. Diana) petals using HPLC. The isolated compound was identified as L-1-O-methyl-myo-inositol, called L-bornesitol, using 1H-NMR, 13C-NMR, and CI-MS. L-Bornesitol was distributed in all organs at high concentrations. L-Bornesitol concentration of petals gradually decreased during flower bud development, but the L-bornesitol content increased by about 5 times.

Published
1999
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40. Time-course study and effects of drying method on concentrations of gamma-aminobutyric acid, flavonoids, anthocyanin, and 2''-hydroxynicotianamine in leaves of buckwheats.

Author

Suzuki T, Watanabe M, Iki M, Aoyagi Y, Kim SJ, Mukasa Y, Yokota S, Takigawa S, Hashimoto N, Noda T, Yamauchi H, and Matsuura-Endo C

Subjects
Azetidinecarboxylic Acid analysis, Free Radical Scavengers analysis, Kinetics, Plant Leaves chemistry, Rutin analysis, Anthocyanins analysis, Azetidinecarboxylic Acid analogs & derivatives, Desiccation methods, Fagopyrum chemistry, Flavonoids analysis, gamma-Aminobutyric Acid analysis
Abstract

Concentrations of gamma-aminobutyric acid (GABA), rutin, minor flavonoids (such as orientin), anthocyanin, and 2''-hydroxynicotianamine (2HN) were quantified in the leaves of common and tartary buckwheat (Fagopyrum esculentum Moench and Fagopyrum tataricum Gaertn., respectively), at 14, 28, and 42 days after sowing (DAS). GABA and rutin concentrations peaked at 42 DAS, whereas anthocyain, 2HN, and minor flavonoid concentrations declined with the age of the plants. However, at 42 DAS, anthocyanin concentrations in the leaves of tartary buckwheat Hokkai T10 leaves were at least 10-fold greater than in the other buckwheats tested. In addition, the effects on target compound concentrations and 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity of three different drying methods (20 h at 40 degrees C, 7 h at 70 degrees C, or lyophilization) were investigated. In general, the drying method had no significant effect on the parameters tested. These results indicate that, in terms of GABA, rutin, and anthocyanin concentrations, leaf powder from 42 day old Hokkai T10 has the potential to be a useful food ingredient, such as Ao-jiru juice.

Published
2009
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41. Identification of anthocyanins in the sprouts of buckwheat.

Author

Kim SJ, Maeda T, Sarker MZ, Takigawa S, Matsuura-Endo C, Yamauchi H, Mukasa Y, Saito K, Hashimoto N, Noda T, Saito T, and Suzuki T

Subjects
Anthocyanins isolation & purification, Chromatography, High Pressure Liquid, Species Specificity, Spectrometry, Mass, Electrospray Ionization, Time Factors, Anthocyanins analysis, Fagopyrum chemistry, Seedlings chemistry
Abstract

The anthocyanin profiles and varieties/breeding line differences of anthocyanin concentrations in common/tartary buckwheat sprouts have been studied. Four anthocyanins, cyanidin 3-O-glucoside, cyanidin 3-O-rutinoside, cyanidin 3-O-galactoside, and cyanidin 3-O-galactopyranosyl-rhamnoside, were isolated from the sprouts of common buckwheat, were separated using high-performance liquid chromatography (HPLC), and were identified using reversed-phase liquid chromatography (LC)/electrospray ionization-mass spectrometry (ESI-MS)/MS techniques. In tartary buckwheat sprouts, two anthocyanins (cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside) were identified. Among 19 common/tartary buckwheat varieties/breeding lines, Hokkai T10 contained the highest amounts of anthocyanins. Cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside concentrations in 6-10 days after seeding sprouts of Hokkai T10 ranged from 0.16 to 0.20 mg/g dry wt and from 5.55 to 6.57 mg/g dry wt, respectively. In addition, dark-grown sprouts of Hokkai T10 accumulated 0.091 and 2.77 mg/g dry wt of cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside whereas other varieties/breeding lines accumulated trace amounts of anthocyanins. Given its anthocyanin-rich red cotyledons, Hokkai T10 is a promising line for use as "Moyashi" type sprouts and is strongly recommended as a new functional food, rich in dietary anthocyanins.

Published
2007
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