Remigi P. auteur aut IRD Faye Aliou auteur aut IRD Kane A. auteur aut IRD Deruaz A. auteur aut IRD Thioulouse J. auteur aut IRD Cissoko Moussa auteur aut IRD Prin Y. auteur aut IRD Galiana A. auteur aut IRD Dreyfus Bernard auteur aut IRD Duponnois Robin auteur aut IRD text journalArticle eng text/pdf born digital access The response of microbial functional diversity as well as its resistance to stress or disturbances caused by the introduction of an exotic tree species, Acacia holosericea, ectomycorrhized or not with Pisolithus albus, was examined. The results show that this ectomycorrhizal fungus promotes drastically the growth of this fast-growing tree species in field conditions after 7 years of plantation. Compared to the crop soil surrounding the A. holosericea plantation, this exotic tree species, associated or not with the ectomycorrhizal symbiont, induced strong modifications in soil microbial functionalities (assessed by measuring the patterns of in situ catabolic potential of microbial communities) and reduced soil resistance in response to increasing stress or disturbance (salinity, temperature, and freeze-thaw and wet-dry cycles). In addition, A. holosericea strongly modified the structure of arbuscular mycorrhizal fungus communities. These results show clearly that exotic plants may be responsible for important changes in soil microbiota affecting the structure and functions of microbial communities. specialized 084 74 5 1485-1493 2008 0099-2240 https://www.documentation.ird.fr/hor/fdi:010042498 10.1128/AEM.02427-07 0099-2240 [F B010042498] https://www.documentation.ird.fr/hor/fdi:010042498 https://www.documentation.ird.fr/intranet/publi/2008/04/010042498.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-05-06 2017-08-23 fdi:010042498 fre