@article{fdi:010077706,
  title = {{I}nvestigating some mechanisms underlying stress metal adaptations of two {B}urkholderia sensu lato species isolated from {N}ew {C}aledonian ultramafic soils},
  author = {{B}ourles, {A}. and {A}mir, {H}. and {G}ensous, {S}. and {C}ussonneau, {F}. and {M}edevielle, {V}. and {J}uillot, {F}ardi and {B}azire, {A}. and {M}eyer, {M}. and {B}urtet-{S}arramegna, {V}. and {C}avaloc, {Y}. and {J}ourand, {P}hilippe and {G}uentas, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n {N}ew {C}aledonia, one third of the main island is covered by ultramafic soils characterized by high levels of metals and low levels of plant nutrients. {I}n these soils, metal tolerant bacteria may play a role in plant adaptation to the edaphic constraints. {R}ecently, two new bacteria species belonging to the genus {B}urkholderia sensu lato were isolated from rhizospheric roots of pioneer plant growing in {N}ew {C}aledonian ultramafic soils and were able to tolerate high metal concentrations. {T}he purpose of this study was to determine the major mechanisms by which these two bacteria were able to tolerate metals and if they were able to reduce metal absorption by plants from which they were isolated. {B}ioaccumulation, adsorption on cell surface, ability to form biofilm and pro-duction of exopolysaccharides were assessed. {A} focus was carried out on {N}i, generally the most toxic metal in {N}ew {C}aledonian ultramafic soils. {A}ll experiments were performed in comparison with a reference strain isolated from a non-ultramafic habitat, {P}araburkholderia caribensis {MWAP}64{T}. {T}he two ultramafic bacterial species showed a high tolerance to {N}i with a {N}i-{IC}50 of 5 m{M} for {C}aballeronia novacaledonica {STM}10272{T} and 30 m{M} for {P}araburkholderia ultramafica {STM}10279{T}, values significantly higher than those of {P}. caribensis {MWAP}64{T} (2 m{M}). {T}he major mechanism involved in the bacterial {N}i tolerance was related to biofilm formation for {C}. novacaledonica {STM}10272{T} and to acidic exopolysaccharide production for {P}. ultramafica {STM}10279{T}. {B}oth species alleviated metal contents in roots of {T}etraria comosa, an endemic pioneer herbaceous species growing on {N}ew {C}aledonian ultramafic soils.},
  keywords = {{NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{E}uropean {J}ournal of {S}oil {B}iology},
  volume = {97},
  numero = {},
  pages = {art. 103166 [9 ]},
  ISSN = {1778-3615},
  year = {2020},
  DOI = {10.1016/j.ejsobi.2020.103166},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077706},
}