Competition between Tuber melanosporum and other ectomycorrhizal fungi under two irrigation regimes. II: Comparison of soils artificially infested with T. melanosporum and T. brumale

A glasshouse experiment was conducted to observe the behavior of the artificial Tuber melanosporum-hazel symbiosis after outplanting in soil infected with the same Tuber species (104 spores cm -3 soil) or T. brumale (10 2 and 10 4 spores cm -3 soil). Despite a low level of Tuber-infection at planting, infection witb T. melanosporum was maintained or increased, whereas infection by other mycorrhizal species remained low. In contrast, in non-inoculated control soil, infection with T. melanosporum declined and was almost completely replaced by other species [...]