Antimicrobial isoflavonoids from Erythrina crista galli infected with Phomopsis sp.

REDKO F; CLAVIN M; WEBER D; RANEA F; ANKE T; MARTINO V

ZEITSCHRIFT FUR NATURFORSCHUNG C-A JOURNAL OF BIOSCIENCES

Año: 2007 vol. 62 p. 164 - 168

0939-5075

The isoflavonoids coumestrol, genistein and daidzein have been isolated and identified by bioassay-guided fractionation from the acetone extract of Erythrina crista galli young twigs .infected with Phomopsis sp. These compounds showed antimicrobial activity against Bacillus brevis (MIC values 16.3, 64.8 and 137.8 fiM, respectively). This is the first time that coumes­trol, besides lutein and n-nonacosane, are reported in this species. Key words: Erythrina crista galli, Phomopsis sp., Isoflavonoids