Archives of Microbiology

, Volume 132, Issue 3, pp 266–269 | Cite as

Catabolism of 5-hydroxyisoflavones by fungi of the genus Fusarium

  • Ulrike Willeke
  • Wolfgang Barz
Original Papers


Fusarium oxysporum f. sp. pisi and F. solani f. sp. cucurbitae degrade the isoflavone biochanin A (I) along the sequence: l→dihydrobiochanin A→3-(p-methoxyphenyl)-4,6-diketo-5,6-dihydro-4H-pyran →3,4-dihydroxyphenylacetic acid. F. oxysporum f. sp. apii, F. moniliforme, F. aquaeductum and F. solani f. sp. phaseoli first O-demethylate I to genistein, whichisdegraded to dihydrogenistein →3-(p-hydroxyphenyl)-4,6-diketo-5,6-dihydro-4H-pyran →3,4-dihydroxyphenylacetic acid. The significance of these alternative homologous catabolic routes are discussed.

Key words

Isoflavones Degradation Fusarium Fungi γ-Pyrone 3,4-Dihydroxyphenylacetic acid O-Demethylation 



Thin layer chromatography


Nuclear magnetic resonance


High performance liquid chromatography




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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Ulrike Willeke
    • 1
  • Wolfgang Barz
    • 1
  1. 1.Lehrstuhl für Biochemie der PflanzenWestfälische Wilhelms-UniversitätMünsterFederal Republic of Germany

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