Catabolism of flavonol glucosides in plant cell suspension cultures |
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Authors: | Elfriede Muhle Wolfgang Hösel Wolfgang Barz |
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Institution: | Lehrstuhl für Biochemie der Pflanzen der Universität 44 Münster/Westf., W. Germany |
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Abstract: | Catabolism of flavonol glucosides was investigated in plant cell suspension cultures using kaempferol 3-O-β-d-glucoside and kaempferol 7-O-β-d-glucoside labelled with 14C either in the glucose or in the flavonol moiety. Catabolic rates of glucosides were compared with those of free glucose and kaempferol. All substrates were degraded efficiently by cell cultures of mungbean, soybean, garbanzo bean and parsley. Based on 14CO2-formation, glucose from position 3 of kaempferol is 3–5 times more rapidly metabolized than that from position 7. The flavonol nucleus from both isomers is, however, oxidized to the same extent with a considerable portion of the flavonol being incorporated into insoluble polymeric cell material. |
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Keywords: | Cell suspension cultures soybean mungbean garbanzo bean parsley flavonol glucosides catabolism |
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