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hydroxygenistein/lupinus albus
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10 resultados
Biosynthesis of antifungal isoflavonoids in Lupinus albus. Enzymatic prenylation of genistein and 2'-hydroxygenistein.
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Characterization of an isoflavonoid-specific prenyltransferase from Lupinus albus.
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Prenylated flavonoids and isoflavonoids possess antimicrobial activity against fungal pathogens of plants. However, only a few plant flavonoid and isoflavonoid prenyltransferase genes have been identified to date. In this study, an isoflavonoid prenyltransferase gene, designated as LaPT1, was
A new class of biflavonoids: 2'-hydroxygenistein dimers from the roots of white lupin.
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Two novel isoflavonoid dimers presumably originating from 2'-hydroxygenistein, 5,7,4'-trihydroxycoumaranochroman-4-one-(3-->5"')-5",7",2"'4"'- tetrahydroxyisoflavone (1, lupinalbisone A) and 5,7,4'-trihydroxycoumaranochroman-4-one-(3-6")-5",7",2"',4"'-te trahydroxyisoflavone (2, lupinalbisone B)
Profiling of flavonoid conjugates in Lupinus albus and Lupinus angustifolius responding to biotic and abiotic stimuli.
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Qualitative and quantitative composition of flavonoid and isoflavonoid glycosides as well as free aglycones in lupin seedlings (roots and aerial parts) grown under different light conditions or responding to infection with Pleiochaeta setosa, a fungus causing brown leaf spot, were monitored by
Distribution of isoflavones in lupin hypocotyls. Possible control of cell wall peroxidase activity involved in lignification.
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The distribution of 4 key isoflavones (luteone, genistein, 2'-hydroxygenistein and wighteone) in lupin (Lupinus albus L. cv. multolupa) hypocotyls shows a gradient that diminishes from young to old tissues. A spatial gradient occurs within the hypocotyl, and a temporal gradient in both the outermost
Biosynthesis of White Lupin Isoflavonoids from [U-C]l-Phenylalanine and Their Release into the Culture Medium.
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Pulse-labeling experiments of white lupin (Lupinus albus L.) cell cultures with [U-(14)C]l-phenylalanine for 72 h resulted in the incorporation of the radioactivity into the isoflavone aglucones, glucosides, and prenylated derivatives. Both the aglucones genistein and 2'-hydroxygenistein and their
Isoflavonoid exudation from white lupin roots is influenced by phosphate supply, root type and cluster-root stage.
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The internal concentration of isoflavonoids in white lupin (Lupinus albus) cluster roots and the exudation of isoflavonoids by these roots were investigated with respect to the effects of phosphorus (P) supply, root type and cluster-root developmental stage. To identify and quantify the major
Profiling isoflavone conjugates in root extracts of lupine species with LC/ESI/MSn systems.
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Extracts obtained from roots of three lupine species (Lupinus albus, L. angustifolius, L. luteus) were analysed using LC/UV and LC/ESI/MS(n). The experiments were performed using two mass spectrometric systems, equipped with the triple quadrupole or ion trap analysers. Thirteen to twenty isomeric
Compositional changes in (iso)flavonoids and estrogenic activity of three edible Lupinus species by germination and Rhizopus-elicitation.
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The effects of germination and elicitation on (iso)flavonoid composition of extracts from three edible lupine species (Lupinus luteus, Lupinus albus, Lupinus angustifolius) were determined by RP-UHPLC-MS(n). The total (iso)flavonoid content of lupine increased over 10-fold upon germination, with the
HPLC analysis of white lupin isoflavonoids.
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An investigation of the HPLC analytical conditions for simple isoflavones, prenylated isoflavones and some of their glucosyl derivatives resulted in reasonable separation and total elution in 35 min when using a reversed-phase C18 Lichrospher column and a gradient elution system of MeCN-THF-H2O.
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