@article{fdi:010076672, title = {{A} leguminous species exploiting alpha- and beta-rhizobia for adaptation to ultramafic and volcano-sedimentary soils : an endemic {A}cacia spirorbis model from {N}ew {C}aledonia}, author = {{V}incent, {B}. and {J}uillot, {F}arid and {F}ritsch, {E}mmanuel and {K}lonowska, {A}gnieszka and {G}erbert, {N}. and {A}cherar, {S}. and {G}rangeteau, {C}. and {H}annibal, {L}aure and {G}aliana, {A}. and {D}ucousso, {M}. and {J}ourand, {P}hilippe}, editor = {}, language = {{ENG}}, abstract = {{A}cacia spirorbis subsp. spirorbis {L}abill. is a widespread tree legume endemic to {N}ew {C}aledonia that grows in ultramafic ({UF}) and volcano-sedimentary ({VS}) soils. {T}he aim of this study was to assess the symbiotic promiscuity of {A}. spirorbis with nodulating and nitrogen-fixing rhizobia in harsh edaphic conditions. {F}orty bacterial strains were isolated from root nodules and characterized through (i) multilocus sequence analyses, (ii) symbiotic efficiency and (iii) tolerance to metals. {N}otably, 32.5% of the rhizobia belonged to the {P}araburkholderia genus and were only found in {UF} soils. {T}he remaining 67.5%, isolated from both {UF} and {VS} soils, belonged to the {B}radyrhizobium genus. {S}trains of the {P}araburkholderia genus showed significantly higher nitrogen-fixing capacities than those of {B}radyrhizobium genus. {S}trains of the two genera isolated from {UF} soils showed high metal tolerance and the respective genes occurred in 50% of strains. {T}his is the first report of both alpha- and beta-rhizobia strains associated to an {A}cacia species adapted to {UF} and {VS} soils. {O}ur findings suggest that {A}. spirorbis is an adaptive plant that establishes symbioses with whatever rhizobia is present in the soil, thus enabling the colonization of contrasted ecosystems.}, keywords = {{B}radyrhizobium ; {P}araburkholderia ; {N}ew {C}aledonia ; {A}cacia spirorbis ; nitrogen fixation ; metal tolerance ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{FEMS} {M}icrobiology {E}cology}, volume = {95}, numero = {8}, pages = {fiz099 [15 p.]}, ISSN = {0168-6496}, year = {2019}, DOI = {10.1093/femsec/fiz099}, URL = {https://www.documentation.ird.fr/hor/fdi:010076672}, }