@article{fdi:010046144, title = {{C}ontrolled ectomycorrhization of an exotic legume tree species {A}cacia holosericea affects the structure of root nodule bacteria community and their symbiotic effectiveness on {F}aidherbia albida, a native {S}ahelian {A}cacia}, author = {{F}aye, {A}. and {K}rasova-{W}ade, {T}. and {T}hiao, {M}. and {T}hioulouse, {J}. and {N}eyra, {M}arc and {P}rin, {Y}. and {G}aliana, {A}. and {N}doye, {I}. and {D}reyfus, {B}ernard and {D}uponnois, {R}obin}, editor = {}, language = {{ENG}}, abstract = {{M}any fast growing tree species have been introduced to promote biodiversity rehabilitation on degraded tropical lands. {A}lthough it has been shown that plant productivity and stability are dependent on the composition and functionalities of soil microbial communities, more particularly on the abundance and diversity of soil symbiotic micro-organisms (mycorrhizal fungi and rhizobia), the impact of tree introduction on soil microbiota has been scarcely studied. {T}his research has been carried in a field plantation of {A}cacia holosericea ({A}ustralian {A}cacia species) inoculated or not with an ectomycorrhizal fungus isolate, {P}isolithus albus {IR}100. {A}fter 7 year's plantation, the diversity and the symbiotic properties of {B}radyrhizobia isolated from the plantation soil or from the surrounding area ({F}aidherbia albida ({D}el.) a. {C}hev. parkland) and able to nodulate {E} albida, a native {S}ahelian {A}cacia species, have been studied. {R}esults clearly showed that {A}. holosericea modified the structure of {B}radyrhizobia populations and their effectiveness on {F} albida growth. {T}his negative effect was counterbalanced by the introduction of an ectomycorrhizal fungus, {P} albus, on {A}. holosericea root systems. {I}n conclusion, this study shows that exotic plant species can drastically affect genotypic and symbiotic effectiveness of native {B}radyrhizobia populations that could limit the natural regeneration of endemic plant species such as {E} albida. {T}his effect could be counterbalanced by controlled ectomycorrhization with {P} albus. {T}hese results have to be considered when exotic tree species are used in afforestation programs that target preservation of native plants and soil ecosystem rehabilitation.}, keywords = {{E}ctomycorrhizal symbiosis ; {B}radyrhizobia ; {A}cacia holosericea, ; {P}isolithus albus ; {S}oil microbial communities ; {E}xotic tree species}, booktitle = {}, journal = {{S}oil {B}iology and {B}iochemistry}, volume = {41}, numero = {6}, pages = {1245--1252}, ISSN = {0038-0717}, year = {2009}, DOI = {10.1016/j.soilbio.2009.03.004}, URL = {https://www.documentation.ird.fr/hor/fdi:010046144}, }