Incorporation of 14CO2, into cardenolide and sapogenin steroids of Digitalis purpurea |
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Authors: | F.J. Evans P.S. Cowley |
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Affiliation: | Department of Pharmacognosy, The School of Pharmacy, University of London, 29/39, Brunswick Square, London WCIN 1AX U.K.;School of Pharmacy, Brighton Polytechnic, Brighton, Sussex U.K. |
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Abstract: | The relative rates of biosynthesis of cardenolide and sapogenin steroids of Digitalis purpurea were estimated by their uptake of 14CO2. The incorporation of label into both groups, although initially slow, indicated that biosynthesis occurs even at the end of the growing season. The sapogenins were produced more rapidly than the cardenolides at this stage of plant development. Within the group of sapogenins, digitogenin, the trihydroxy compound, was produced at a greater rate than the dihydroxy steroid gitogenin. In the case of the cardenolides, the trihydroxy gitoxigenin was produced at a slower rate than the dihydroxy digitoxigenin. |
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Keywords: | Scrophulariaceae biosynthesis steroids gitogenin digitogenin gitoxigenin digitoxigenin. |
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