Diagne N. auteur aut IRD Thioulouse J. auteur aut IRD Sanguin H. auteur aut IRD Prin Y. auteur aut IRD Krasova-Wade T. auteur aut IRD Sylla S. auteur aut IRD Galiana A. auteur aut IRD Baudoin Ezékiel auteur aut IRD Neyra Marc auteur aut IRD Svistoonoff Sergio auteur aut IRD Lebrun Michel auteur aut IRD Duponnois Robin auteur aut IRD text journalArticle eng text/pdf born digital access Increasing interest has been given so far to the role of mycorrhizal symbiosis on plant diversity and ecosystem productivity. However much remains unknown about the effect of ectomycorrhizal fungal diversity on plant growth and rhizobial symbiosis. The purpose of this study is to investigate the influence of ectomycorrhizal diversity on root nodulation and plant nutrient uptake during plant growth. A gradient of ectomycorrhizal diversity was created (ranged from one to six fungal isolates) on Australian Acacia (Acacia mangium) seedlings grown on a phosphate-deficient soil in controlled conditions. The results dearly show (i) an enhancement of A. mangium growth due to ectomycorrhizal fungal inoculation, (ii) as well as significant effects of increasing ectomycorhizal diversity and soil ectomycorrhizal mycelium density on whole plant biomass and plant nutrient uptake. They also reveal an effect of ectomycorrhizal diversity effect on the functioning of the nitrogen-fixing symbiosis. These results emphasize the need to manage soil ectomycorrhizal potential (abundance and diversity of ectomycorrhizal mycelium) in forest management practices in order to optimize N-2 fixation and seedling growth, leading thus to dramatic improvements in outplanting performances with fast-growing tree legumes on various reafforestation sites, more particularly in tropical and Mediterranean areas. specialized Ectomycorrhizal fungal diversity Nitrogen fixation Tree growth 084 076 57 468-476 2013 0038-0717 https://www.documentation.ird.fr/hor/fdi:010060824 10.1016/j.soilbio.2012.08.030 0038-0717 [F B010060824] https://www.documentation.ird.fr/hor/fdi:010060824 https://www.documentation.ird.fr/intranet/publi/2013/05/010060824.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2013-05-31 2017-08-23 fdi:010060824 fre