Arbuscular mycorrhizal communities in different tropical pastures of the brazilian northeast

The composition of the arbuscular mycorrhizal fungi (AMF) community was evaluated after the native vegetation was replaced by pasture. The systems: Andropogon gayanus, Brachiaria brizantha, Panicum Maximum and Cynodon dactylon and an agrosilvipastoril system (AFS) were studied; and a fragment of native forest. Soil samples were collected at depth of 20 cm. Eight families, 11 genera and 19 species of AMF were characterized. Glomeromycota species predominated in most pasture systems for both seasons, indicating the adaptation of these fungi.