Efeito de diferentes comunidades de fungos micorrízicos arbusculares no crescimento de plantas nativas pertencentes aos diferentes grupos ecológicos da sucessão

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

23/02/2010

RESUMO

The aim of this work was to evaluate the response of nine plant species belonging to different ecological successional groups to communities of arbuscular mycorrhizal fungal (AMF) from different plant successional stages. The experiment was carried out in greenhouse with three gramineous species, three pioneer woody species, and three late successional woody species, which represent different ecological successional groups. Plants were grown in either sterilized or natural soil obtained from four sites representing different phases of the plant succession. Root colonization, plant response (responsiveness), root:shoot ratio, root morphological traits, concentration and contents of nutrients in shoots were analyzed after a growth period of 90 to 180 days, depending on the plant species. The gramineous and pioneer species had greater mycorrhizal root colonization and responsiveness, more root total and specific length, greater incidence and length root hair, and smaller root diameter than the late successional species. The mycorrhizal status resulted in strong growth depression in the gramineous species. Moreover, mycorrhiza altered the concentration and content of nutrients in the shoots of gramineous, pioneer woody trees, and L. muehlbergianus. On the other hand, the mycorrhizal status influenced on both concentration and contents of nutrients in the late successional woody species was much less pronounced than observed for gramineous and pioneer woody species.

ASSUNTO(S)

fungos micorrízicos micorriza raízes (botânica) - morfologia sucessão ecológica Árvores mycorhiza roots (botany) morphology sucession ecological

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