Effects of grasses, Terfezia terfezioides fungi and some phenolics on soil microorganisms
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The influence of grasses and phenolics (pyrogallol and tannic acid) was studied on the soil microbial community (Terfezia terefezoides fungi) in rhizosphere and mycorhizosphere soils after black locust forest. For microbial analyses, PCT method was used and various nutritional mediums were used. The population of humifying and ammonifying microorganisms was maximum in degraded mature fruits of Terfezia terf zioides fungi, and minimum in rhizosphere soil of mixed grasses. This showed the possible allelopathic effects of grasses and their roots on soil microorganisms and had protective role in truffles development. Saprophytic mycobacteria was dominant in the microbial population. In these soils, the mixed grasses stimulated the development of actinomycetes of sect. Viridis and to sect. Violet (family Actinomycetaceae) and also had microbicidal effects on humifying and ammonifying microbial population in the soil compared to microbial community in Festuca spp. alone. Pyrogallol was most inhibitory to soil microorganisms than tannic acid.
Извор:Allelopathy Journal, 2007, 19, 2, 175-321