Resumo

GUERRA S., BEATRIZ ELENA  e  CHACON V., MARTHA ROCIO. ARBUSCULAR MYCORRHIZAL SYMBIOSIS AND ACUMULATION OF ALUMINUM Brachiaria decumbens AND Manihot esculenta. Rev.Bio.Agro [online]. 2012, vol.10, n.2, pp.87-98. ISSN 1692-3561.

Oil palm (Elaeis guineensis Jacq) soils from-Santander Puerto Wilches-Colombia, have low fertility, high aluminum saturation and low density of mycorrhizal fungal spores. Behavior mycorrhizal symbiosis was evaluated using native soils with mycorrhizae (MA +) and sterile soils without mycorrhizae (MA -) using Brachiaria decumbens and Manihot esculenta, both plants have high mycotrophy and ion binding capacity of aluminum. Variables were spore density, percentage of mycorrhizal colonization, biomass and root length, concentration of aluminum at leaf and root. Was performed (ANOVA) with a two-way general linear model. There were mycorrhizal colonization rates exceeding 70% in B. decumbens in soils with concentrations of 0,6 and 1,4 meq/100 g of aluminum. M. esculenta established mycorrhization at 50% in all four soils. Spores were increased up to 200% in the two hosts plants. Aluminum concentrations were higher in mycorrhizal roots, while leaf-level values were lower.

Palavras-chave : Aluminum hyperaccuumulators plants; Increased mycorrhizal propagles; Oil Palm monoculture.

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