Soil microfungi diversity in Celtis tala and Scutia buxifolia forests in easterens Buenos Aires Province (Argentina)

ELÍADES L, CABELLO M, VOGET C

International Journal of Agricultural Technology

RMUTTO

Lugar: Bangkok; Año: 2006 vol. 2 p. 229 - 249

1686-9141

Microfungi from three soils, namely Argialboll, Natracualf and Rendoll, from a native forest inArgentina were studied at two different depths by soil washing methods. Fungi were isolatedby using both slightly acid (pH 6) and alkaline culture media (pH 8 and 11). Eighty-five taxa offungi were recorded: 60 from Argialboll, 56 from Natracualf and 69 from Rendoll. Thirty-ninespecies were found to be present in the three soils. Anamorphic fungi showed the greatestnumber of species, varying between 74 and 82% of the total mycota identified. Ascomycota inArgialboll and Rendoll were more abundant in deeper horizons, whereas Zygomycota weremore abundant in superficial horizons. However, in Natracualf, the largest number ofAscomycota and Zygomycota were found in superficial horizons and in deeper horizons,respectively. Fusarium solani and F. oxysporum were the species that mostly contributed todiversity. As pH increased, the frequency of F. solani increased, while that of F. oxysporumdecreased. The number of fungal colonies present in each particle of soil plated decreased inthe deeper horizons, while species richness was larger in the same horizons.Key words: Alkaline medium, Argialboll, fungal diversity, Natracualf, Rendoll, soil horizons.