Publication Type
Journal Article
Journal Name
Phytochemistry
Publication Date
1-1-2003
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. © 2003 Elsevier Ltd. All rights reserved.
Keywords
Allelopathy, Desmodium uncinatum, Leguminosae, Radical growth inhibitor, Scrophulariaceae, Seed germination stimulant, Striga hermonthica, Uncinanone A, B and C
PubMed ID
12946425
Recommended Citation
Tsanuo, M., Hassanali, A., Hooper, A., Khan, Z., Kaberia, F., Pickett, J., & Wadhams, L. (2003). Isoflavanones from the allelopathic aqueous root exudate of Desmodium uncinatum. Phytochemistry, 64 (1), 265-273. https://doi.org/10.1016/S0031-9422(03)00324-8