Fusarium from soil fungi

Hymexazole (Tomita, 1973) is effective mainly against soil fungi and fungi causing diseases spreading with the seeds, such as Fusarium, Aphanomyces, Pythium and Corticium spp. Plant roots rapidly absorb the active substance from a nutrient solution or from the soil, the substance then being translocated into the leaves. In the plant tissues hymexazole is detoxicated into two main metabolites,... 

A group of compounds 147-150, belonging to the trichothecenes class of sesquiterpenes, have been isolated from several Trichoderma species [216-222]. The first example identified was trichodermin (147), isolated from a strain of Trichoderma viride obtained from a soil sample from New Guinea [216], Trichodermin is active against a variety of pathogenic fungi Fomes annosus is the most susceptible and Fusarium oxysporum the most resistant [216, 219]. The newest member of this class (149) has been... 

A wide range of bacteria and fungi, and some protozoan, algal and mammalian cells have the ability to hydrolyse fluorescein diacetate. Recently Schnurer and Rosswall have used this substrate to develop an assay for esterase activity in soil and straw based on the spectrophotometric determination of extracted fluorescein. The amounts formed increased linearly with time (up to 3h). The rates of hydrolysis were directly proportional to the amounts of soil used, to the amounts of fungal mycelium (Fusarium culmorum) or bacterial biomass (Pseudomonas denitrifleans) in buffered (pH 7.6) pure culture suspensions, and, in the case of fungi, to the amounts added to autoclaved soil, which alone was inactive. Esterase activities correlated with respiratory (O2 uptake) activities for samples from different depths in the soil profile. 

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