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Accumulation of mansonones E and F in Ulmus Hollandica infected with Ceratocystis ulmi

1970; Elsevier BV; Volume: 9; Issue: 9 Linguagem: Inglês

10.1016/s0031-9422(00)85345-5

1873-3700

J. C. Overeem, D. M. Elgersma,

Biological Activity of Diterpenoids and Biflavonoids

TLC of alcoholic extracts of the xylem of Ulmus hollandica "Belgica" infected with C. ulmi revealed three spots which were not detected when the same amount of extract of healthy wood was chromatographed. Two of these spots showed fungitoxic activity. Extracts of U. hollandica cl. 390 (resistant against Dutch elm disease) inoculated with C. ulmi contained the same compounds. Again the compounds were not detected in healthy wood. The two fungitoxic compounds have been isolated. They proved to be identical with mansonone E (I) and mansonone F (II) respectively.