Zusammenfassung
14C-Labelled hexoses, progesterone, glucosyl-adynerine and digitoxigenine-14C-glucosid were fed to leaves of Nerium oleander L. The incorporation of these substrates into gentiobiosyl-adynerine, a genuine triglycoside, was studied. Glucose seems to be the natural precursor for the sugar chain. Formation of the gentiobiosyl residue was found to occur sequentially. After feeding ...
Zusammenfassung
14C-Labelled hexoses, progesterone, glucosyl-adynerine and digitoxigenine-14C-glucosid were fed to leaves of Nerium oleander L. The incorporation of these substrates into gentiobiosyl-adynerine, a genuine triglycoside, was studied. Glucose seems to be the natural precursor for the sugar chain. Formation of the gentiobiosyl residue was found to occur sequentially. After feeding digitoxigenine-14C-glucosid to the leaves of Nerium oleander, no turnover of this tentative precursor could be detected. It was concluded that cardenolide-glucosides do not seem to play a role in the biosynthesis of deoxysugars.
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