In Vitro Antifungal Activity of Strains of Trichoderma harzianum

Authors: ÇİĞDEM KÜÇÜK, MERİH KIVANÇ

Abstract: Interactions between Trichoderma harzianum strains and some soilborne plant pathogens (Gaeumannomyces graminis var. tritici, Fusarium culmorum and F. moniliforme) were studied on PDA medium. All T. harzianum strains tested produced a metabolite that inhibited growth of plant pathogenic fungi on PDA medium. When grown in liquid cultures containing laminarin, chitin or fungal cell walls as sole carbon sources, 2 strains of T. harzianum produced 1,3-\beta-glucanase and chitinase in the medium. Higher levels of these enzymes were induced by T. harzianum T15.

Keywords: Trichoderma harzianum, plant pathogenic fungi, lytic enzymes

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