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Conversion of Phaseollin to Phaseollinisoflavan by Stemphylium botryosum. Verna J. Higgins, Department of Botany, University of Toronto, Toronto, Canada; A. Stoessl(2), and Michele C. Heath(3). (2)Canada Department of Agriculture Research Institute, London, Ontario, Canada; (3)Department of Botany, University of Toronto, Toronto, Canada. Phytopathology 64:105-107. Accepted for publication 20 August 1973. DOI: 10.1094/Phyto-64-105.

A compound formed from the pterocarpanoid phytoalexin, phaseollin, by the activity of the fungus Stemphylium botryosum was identified as phaseollinisoflavan on the basis of chromatographic comparisons and by ultraviolet absorption, nuclear magnetic resonance, and mass spectra.