Tsanuo, Muniru K., Hassanali, Ahmed, Hooper, Antony M., Khan, Zeyaur, Kaberia, Festus, Pickett, John A.  ORCID: https://orcid.org/0000-0002-8386-3770 and Wadhams, Lester J.
2003.
Isoflavanones from the allelopathic aqueous root exudate of Desmodium uncinatum.
Phytochemistry
64
(1)
, pp. 265-273.
10.1016/S0031-9422(03)00324-8
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Abstract
Three isoflavanones, 5,7,2′,4′-tetrahydroxy-6-(3-methylbut-2-enyl)isoflavanone (1), 4″,5″-dihydro-5,2′,4′-trihydroxy-5″-isopropenylfurano-(2″,3″;7,6)-isoflavanone (2) and 4″,5″-dihydro-2′-methoxy-5,4′-dihydroxy-5″-isopropenylfurano-(2″,3″;7,6)-isoflavanone (3) and a previously known isoflavone 5,7,4′-trihydroxyisoflavone [genistein (4)] were isolated and characterised spectroscopically from the root exudate of the legume Desmodium uncinatum (Jacq.) DC. We propose the names uncinanone A, B, and C for compounds 1, 2 and 3, respectively. Isolated fractions containing uncinanone B (2) induced germination of seeds from the parasitic weed Striga hermonthica (Del.) Benth. and fractions containing uncinanone C (3) moderately inhibited radical growth, the first example of a newly identified potential allelopathic mechanism to prevent S. hermonthica parasitism. Three isoflavanones, including the two shown were isolated and characterised spectroscopically from the root exudate of the legume Desmodium uncinatum (Jacq.) DC. Isolated fractions containing isoflavanone (R=H) induced germination of seeds from the parasitic weed Striga hermonthica (Del.) Benth and fractions containing the isoflavanone (R=Me) moderately inhibited radical growth, the first example of a newly identified potential allelopathic mechanism to prevent S. hermonthica parasitism.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Chemistry |
| Publisher: | Elsevier |
| ISSN: | 0031-9422 |
| Last Modified: | 05 Mar 2026 15:01 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/185538 |
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