Abstract
Six provenances of Acacia auriculformis have been tested for their ectomycorrhizal dependency with 2 indigenous strains of Pisolithus sp. Moreover, the endomycorrhizal and rhizobial symbiosis, the multiplication of plant parasitic nematodes have been quantified. The results showed significant variations in plant development between provenances. Both the compatibility with and dependency on the ectomycorrhizal strains were different among the provenances. Three main genera of nematodes have been identified, in particular S. cavenessi, which is one of the most pathogenic nematodes of soudano-sahelian crops. Endomycorrhizal structures were sometimes detected on the root systems. These results suggest that provenances of A. auriculiformis that are well adapted to the indigenous environmental conditions (pedoclimatic, soil borne pathogens) must be selected for their mycorrhizal dependency and for their resistance to plant parasitic nematodes. Moreover, the ectomycorrhizal symbiosis has to be considered as an important component of the cultural system.
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