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'Apigenin' in keywords
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1985 (1)
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1Author    R. Theodor, R. Mues, H. D. Zinsmeister, K. R. MarkhamRequires cookie*
 Title    Flavon C-Glykoside aus Metzgeria furcata (Hepaticae) Flavone C-Glycosides from Metzgeria furcata (H epaticae)  
  Reference    Z. Naturforsch. 38c, 165 (1983); eingegangen am 29. Septem ber 1982 
  Published    1983 
  Keywords    Metzgeria, Metzgeriaceae, Hepaticae, Apigenin-, Luteolin-, Tricetin D i-C -G lycosid es 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0165.pdf 
 Identifier    ZNC-1983-38c-0165 
 Volume    38 
2Author    Wolfgang Stein, SiegbertA. Nhut, H. D. Ietm Ar Zinsm, Rüdiger Mues, Wolfgang Barz, Johannes KösterRequires cookie*
 Title    New Flavone Glucoside Malonylesters from Bryum capillare  
 Abstract    -ö"-malonate From Bryum capillare Hedw. a variety of flavone glucosides and their 6"malonyl esters were isolated. Diosmetin 7-0-ß-D-glucoside-6"-malonylester, luteolin 7-0-ß-D-glucoside-6"malonyl-ester and 6-OH-luteolin 7-0-ß-D-glucoside-6"malonylester are new flavone malonyl esters. This is the first report of flavone glucoside malonylesters in a non vascular plant. The flavonoid pattern of the gametophyte is different from that of the sporophyte. The chemotaxonomic relevance of these results is discussed. 
  Reference    Z. Naturforsch. 40c, 469—473 (1985); received April 15 1985 
  Published    1985 
  Keywords    Bryum, Bryales, Musci, Apigenin-, Diosmetin-, Luteolin-, 6-OH-Luteolin, 7-O-glucoside 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0469.pdf 
 Identifier    ZNC-1985-40c-0469 
 Volume    40 
3Author    RobleyJ. Light, Klaus HahlbrockRequires cookie*
 Title    Randomization of the Flavonoid A Ring during Biosynthesis of Kaempferol from |l,2 -,3C2j Acetate in Cell Suspension Cultures of Parsley  
 Abstract    Cell suspension cultures o f parsley (Petroselinum hortense) were incubated with [l,2-13C2]ace-tate during a period o f active flavonoid production. The flavonoid glycosides were extracted with ethanol, hydrolyzed in dilute acid, and the aglycones purified by chromatography. Apigenin, a flavone, and kaempferol, a flavonol, were analyzed at 67.9 MHz by 13C FT NMR. The 13C enrich­ ment confirmed that acetate contributes primarily to the flavonoid A ring. The coupling patterns between adjacent 13C atoms o f the A ring indicate that the cyclization direction of the A ring is random in both compounds. While randomization o f apigenin could have occurred chemically through opening of the pyrone ring under the acid conditions used for glycoside hydrolysis, ran­ domization o f the more stable flavonol must have occurred biosynthetically. The latter result supports the conclusion that a chalcone is an intermediate in flavonoid biosynthesis. 
  Reference    Z. Naturforsch. 35c, 717—721 (1980); received May 9 1980 
  Published    1980 
  Keywords    13C-NMR, Apigenin, Kaempferol, Flavonoid, Biosynthesis 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0717.pdf 
 Identifier    ZNC-1980-35c-0717 
 Volume    35 
4Author    G. Stotz, G. ForkmannRequires cookie*
 Title    Oxidation of Flavanones to Flavones with Flower Extracts of Antirrhinum majus (Snapdragon)  
 Abstract    Enzyme preparations from flowers of Antirrhinum majus catalysed the oxidation of naringenin to apigenin and o f eriodictyol to luteolin. Enzyme activity was found to be localized in the microsomal fraction. The reaction required NADPH as cofactor and had a pH optimum o f about 7.0. The NADPH-dependent microsomal enzyme activity was also present in flower extracts of other flavone-producing plants, whereas flower extracts of plants which lack flavones were found to lack also this enzyme activity. 
  Reference    Z. Naturforsch. 36c, 737—741 (1981); received June 4 1981 
  Published    1981 
  Keywords    Antirrhinum majus, Flavonoid Biosynthesis, Flavanone Oxidase, Apigenin, Luteolin 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0737.pdf 
 Identifier    ZNC-1981-36c-0737 
 Volume    36