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Ciência Florestal
Centro de Pesquisas Florestais - CEPEF, Departamento de Ciências Florestais - DCFL, Programa de Pós Graduação em Engenharia Florestal - PPGEF
ISSN: 0103-9954
EISSN: 0103-9954
Vol. 22, No. 4, 2012, pp. 813-820
Bioline Code: cf12075
Full paper language: English
Document type: Research Article
Document available free of charge

Ciência Florestal, Vol. 22, No. 4, 2012, pp. 813-820

 pt DOSES DE FÓSFORO DETERMINAM A PREVALÊNCIA DE FUNGOS MICORRÍZICOS ARBUSCULARES EM Araucaria angustifolia check for this species in other resources
Moreira, Milene; Beretta, Dilmar & Cardoso, Elke Jurandy Bran Nogueira

Resumo

Com o objetivo de avaliar o efeito de doses crescentes de fósforo sobre a diversidade, esporulação e colonização de fungos micorrízicos arbusculares (FMA) nativos de florestas de Araucaria angustifolia check for this species in other resources , foi conduzido um experimento em casa de vegetação, utilizando a araucária como planta-isca. O experimento foi montado em delineamento inteiramente casualizado, com cinco repetições, compreendendo quatro doses de fósforo (0, 20, 50 e 150 mg kg-1) de substrato na forma de KH2PO4. As plântulas de araucária, inoculadas com 100 g de solo rizosférico, proveniente de mata nativa, foram cultivadas em vasos contendo 10 kg de solo, pelo período de um ano. Após a colheita, determinou-se a densidade de esporos, a taxa de colonização micorrízica e a diversidade de FMA, através da identificação morfológica dos esporos. Os dados foram submetidos à análise univariada e análise de correspondência (AC). Considerando as quatro doses de P, foram identificadas 11 espécies de FMA ( Acaulospora bireticulata check for this species in other resources , Acaulospora morrowiae, check for this species in other resources Acaulospora sp., Entrophospora colombiana check for this species in other resources , Gigaspora margarita check for this species in other resources , Glomus diaphanum check for this species in other resources , Glomus etunicatum check for this species in other resources , Glomus macrocarpum check for this species in other resources , Scutellospora calospora check for this species in other resources , Scutellospora gilmorei check for this species in other resources , e Scutellospora pellucida check for this species in other resources ). Não houve efeito significativo da dose de P sobre o número de esporos e a colonização radicular. A AC demonstrou que houve efeito da dose de P sobre a abundância de esporulação de cada espécie, sendo que alguns FMA se associaram mais com determinada dose de P, e outros com outra.

Palavras-chave
FMA; diversidade; densidade de esporos; pinheiro brasileiro

 
 en PHOSPHORUS DOSES DETERMINE THE PREVALENCE OF NATIVE ARBUSCULAR MYCORRHIZAL FUNGI IN Araucaria angustifolia check for this species in other resources
Moreira, Milene; Beretta, Dilmar & Cardoso, Elke Jurandy Bran Nogueira

Abstract

A greenhouse experiment was installed with bait cultures to extract the AMF species present in a rhizosphere soil sample of a native Araucaria angustifolia check for this species in other resources forest in Campos do Jordão, Brazil. The experimental design was completely randomized, with four increasing phosphorus doses (0, 20, 50, and 150 mg kg-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 were extracted, counted and identified, and the percent root colonization was also determined. When taking all four P doses into account, eleven AMF species could be identified: Acaulospora bireticulata check for this species in other resources , Acaulospora morrowiae, check for this species in other resources Acaulospora sp., Entrophospora colombiana check for this species in other resources , Gigaspora margarita check for this species in other resources , Glomus diaphanum check for this species in other resources , Glomus etunicatum check for this species in other resources , Glomus macrocarpum check for this species in other resources , Scutellospora calospora check for this species in other resources , Scutellospora gilmorei check for this species in other resources , and Scutellospora pellucida check for this species in other resources . 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.

Keywords
AMF; diversity; spore density; Brazil Pine

 
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