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Putrescine and putrescine N-methyltransferase in the biosynthesis of tropane alkaloids in cultured roots of Hyoscyamus albus : II. Incorporation of labeled precursors.
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[1,4-(14)C]Putrescine, administered to cultured roots of Hyoscyamus albus L., was converted to spermidine and spermine as well as to conjugated forms. A substantial fraction of its radioactivity (approx. 6%) was, however, incorporated into N-methylputrescine within 4 h, followed by an increase in
Jasmonates induce over-accumulation of methylputrescine and conjugated polyamines in Hyoscyamus muticus L. root cultures.
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Jasmonic acid (JA) and its methyl ester (MeJA) at concentrations ranging from 0.001 to 10 μM provoked large increases in methylputrescine levels in normal and hairy roots of Hyoscyamus muticus L.; generally, levels of free putrescine and perchloric acid-soluble conjugated putrescine, spermidine and
Cardiovascular inhibitory effects of Hyoscyamus niger.
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This study describes the hypotensive, cardiosuppressant and vasodilator activities of Hyoscyamus niger crude extract (Hn.Cr). Hn.Cr, which tested positive for alkaloids, coumarins, flavonoids, sterols, tannins and terpenes, caused a dose-dependent (10-100 mg/kg) fall in the arterial blood pressure
Putrescine and putrescine N-methyltransferase in the biosynthesis of tropane alkaloids in cultured roots of Hyoscyamus albus : I. Biochemical studies.
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The activity of arginine decarboxylase (EC 4.1.1.19) in cultured roots of Hyoscyamus albus L., which produce considerable amounts of tropane alkaloids, was twice that of ornithine decarboxylase (EC 4.1.1.17), both activities being highest during active root growth, whereas arginase (EC 3.5.3.1)
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