Influence of acidity on the growth of Trichoderma viride Pers. ex Fr. and on the inhibitory effect of its filtrates against Fomes annosus (Fr.) Cke. in artificial cultures

Abstract

This work reports results of observations on mycelial dry weight yield, pH changes and the inhibitory effect of filtrates of Trichoderma viride on linear growth of the mycelium of Fomes annosus. The maximum mycelial yield of T, viride, derived from spores was obtained within the pH range 2,5-3,1. The greatest inhibitory effect of filtrates on the mycelial growth of /". annosus occurred at an initial pH of the Tricboderma cultures from 2,0-3,5. At other pHvalues, no inhibition was found.

The plasticity of fungal interactions

“…Trichoderma asperellum, T. viride, T. harzianum, and T. atroviride are the main species used in biological preparations as effective bio-pesticides against pathogenic Fusarium, Pythium, Phytophthora, Alternaria, Sclerotinia, Botrytis, and others (Regliński et al 2012;Minchin et al 2012). Although their effectiveness has been confirmed (Sierota 1976;Howell 2006;Tucci et al 2011;Patil et al 2012), some authors (e.g., Kredics et al 2003) dispute the unambiguous antagonistic properties of Trichoderma against pathogens. The role of the environmental context, such as the soil C:N ratio, the abundance of phosphorus and carbon, moisture level, pH, temperature, UV radiation, and the presence of other microorganisms is highlighted.…”

Growth and Antagonism of <i>Trichoderma</i> spp. and Conifer Pathogen <i>Heterobasidion annosum</i> s.l. <i>in Vitro</i> at Different Temperatures

“…Possible mechanisms involved in disease control by Trichoderma include mycoparasitism, antibiosis, competition, and induction of plant defence responses [9]. Trichoderma are also woodcolonising fungi which restrict the growth of H. annosum in vitro and under natural conditions [10,11]. There are a number of other investigations of antagonistic action of Trichoderma against Heterobasidion [12][13][14][15][16].…”