THE EFFECT OF TRICHODERMA-HARZIANUM SIDEROPHORES ON YEASTS AND WOOD-ROTTING FUNGI

Trichoderma strains were screened for siderophore production and the a ntimicrobial activities of the crude siderophore preparations against various fungi were compared. The siderophores of T. harzianum strains CBS 243.71 and VTT-D-80150 were most promising and were selected for f urther studies. The siderophores were purified from culture filtrates using gel-filtration and ion exchange chromatography and the antimicro bial activities of the purified siderophores against molds, yeasts and wood rotting fungi were assayed. T. harzianum VTT-D-80150 concentrate d culture filtrates as well as the purified siderophore inhibited the growth of the indicator yeasts. T. harzianum CBS 243.71 siderophore in hibited the growth of brown-rot fungi.