Biosynthesis of coumestrol in Phaseolus aureus |
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Authors: | J Berlin PM DewickW Barz H Grisebach |
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Institution: | Institute of Biology II, Plant Biochemistry, Schänzlestrasse 9-11, University of Freiburg i. Br., Germany |
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Abstract: | Feeding experiments with 4′,7-dihydroxyisoflavone-4-14C] (daidzein), 2′,4′,7-trihydroxyisoflavone-T] and (±)-4′,7-dihydroxyisoflavanone-T] (dihydrodaidzein) in suspension cultures of mung bean (Phaseolus aureus Roxb.) roots have shown that daidzein is a better precursor of the coumestan coumestrol than is the trihydroxyisoflavone and that dihydrodaidzein can also be converted very efficiently. The results provide further evidence for the intermediacy of a pterocarp-6a-en in coumestrol biosynthesis, and also indicate the possible existence of a 'metabolic grid' of isoflavones and isoflavanones in P. aureus. |
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Keywords: | Phaseolus aureus Leguminosae biosynthesis coumestrol daidzein dihydrodaidzein |
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