DOSES DE FÓSFORO DETERMINAM A PREVALÊNCIA DE FUNGOS MICORRÍZICOS ARBUSCULARES EM Araucaria angustifolia - (2012)
Acessos: 26
Milene Moreira, Dilmar Baretta, Elke Jurandy Bran Nogueira Cardoso
Volume: 22 - Issue: 4
Resumo.
A greenhouse experiment was installed with bait cultures to extract the AMF species present in a rhizosphere soil sample of a native Araucaria angustifolia forest in Campos do Jordão, Brazil. Theexperimental design was completely randomized, with four increasing phosphorus doses (0, 20, 50, and 150 mgkg-1, as triple superphosphate), with five replicates, the bait plant was araucaria, and all pots were inoculated with 100 g of rhizospheric soil collected in an araucaria forest. After twelve months the spores wereextracted, counted and identified, and the percent root colonization was also determined. When taking all four Pdoses into account, eleven AMF species could be identified: Acaulospora bireticulata, Acaulospora morrowiae, Acaulospora sp., Entrophospora colombiana, Gigaspora margarita, Glomus diaphanum, Glomus etunicatum, Glomus macrocarpum, Scutellospora calospora, Scutellospora gilmorei, and Scutellospora pellucida. There was no effect of the P dose on the total amount of spores neither on the percent root colonization. However, the correspondence analysis showed that the different AMF species were selectively associated mostly to either one or another P dose.
Idioma: Portuguese
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