Isolation of the Phytoalexin Medicarpin from Leaflets of Arachis hypogaea and Related Species of the Tribe Aeschynomeneae
2014
Strange, R. N. | Ingham, J. L. | Cole, D. L. | Cavill, M. E. | Edwards, C. | Cooksey, C. J. | Garrattd, P. J.
A phytoalexin produced by the leaflets of seven cultivars of Arachis hypogaea (groundnut) after natural infection by Cercospora arachidicola or Phoma arachidicola has been characterised as the isoflavonoid (+)-medicarpin (3-hydroxy-9-methoxypterocarpan). Treatment of excised groundnut leaflets with an aqueous solution of CuSO₄ or with a spore suspension of the fungus Helmin-thosporium carbonum has also been found to stimulate medicarpin biosynthesis.
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