Resumo

BECERRA, Alejandra Gabriela et al. Arbuscular mycorrhizal colonization of  Alnus  acuminata Kunth in northwestern Argentina in relation to season and soil parameters. Cienc. suelo [online]. 2007, vol.25, n.1, pp.7-13. ISSN 1850-2067.

The objective of this study was to determine patterns of arbuscular mycorrhizal (AM) colonization of Alnus acuminata Kunth at two natural forests in relation to soil parameters at two different seasons (autumn and spring). The soil parameters studied were field capacity, pH, electrical conductivity, available P, total N and organic matter. The percentage of AM colonization was estimated and correlated to soil properties and to two different seasons. The results indicate that the percentage of AM colonization varied among soil types and was higher in spring than autumn. A significant positive correlation was found between AM colonization and electrical conductivity, organic matter and total Nitrogen. Results of this study provide evidence that AM colonization of A. acuminata can be affected by some soil parameters and seasonality.

Palavras-chave : Alnus; Aarbuscular mycorrhizal; Seasonality; Soil type; Yunga forest.

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