2-DECENO-DELTA-LACTONE-PRODUCING FUNGI, STRAINS OF FUSARIUM-SOLANI, ISOLATED BY USING A MEDIUM CONTAINING DECANO-DELTA-LACTONE AS THE SOLE CARBON SOURCE

A screening procedure for microorganisms which have an ability to prod uce a desired compound as their secondary metabolite is first proposed . In some cases, the target microorganisms can be expected to grow and be enriched in a medium containing the desired compound, namely one o f the secondary metabolites of the microorganisms, as the sole source of carbon, degrading and assimilating the compound to the primary meta bolites. This approach was applied to isolate alkano-delta-lactones pr oducing fungi by using a medium containing alkano-delta-lactones as th e sole source of carbon. We isolated Fusarium solani and Trichoderma v iride that had the ability to biosynthesize 2-deceno-delta-lactone (ma ssoialactone) and ,4-decadieno-delta-lactone(6-pentyl-alpha-pyrone), r espectively, in a glucose medium.