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Soussou S., Brunel B., Pervent M., van Tuinen D., Cleyet-Marel J. C., Baudoin Ezékiel. (2017). Rhizobacterial Pseudomonas spp. strains harbouring acdS gene could enhance metallicolous legume nodulation in Zn/Pb/Cd mine tailings. Water Air and Soil Pollution, 228 (4), art. 142 [15 p.]. ISSN 0049-6979

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Titre
Rhizobacterial Pseudomonas spp. strains harbouring acdS gene could enhance metallicolous legume nodulation in Zn/Pb/Cd mine tailings
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000399872600021
AuteursSoussou S., Brunel B., Pervent M., van Tuinen D., Cleyet-Marel J. C., Baudoin Ezékiel.
SourceWater Air and Soil Pollution, 2017, 228 (4), p. art. 142 [15 p.]. p. art. 142 [15 p.] ISSN 0049-6979
RésuméPhytostabilisation can benefit from phytostimulatory rhizobacteria. Forty-three bacterial strains were isolated from the roots of the metallicolous legume Anthyllis vulneraria ssp. carpatica grown in a highly contaminated mine tailing (total Cd, Pb and Zn were up to 1200; 34,000; and 170,000 mg kg(-1), respectively). We aimed at evaluating their phytostimulatory effects on the development of leguminous metallophytes. Strains were screened for fluorescent siderophores and auxin synthesis, inorganic P solubilisation and 1-amino-cyclopropane-1-carboxylate deaminase (ACCd) activity to define a subset of 11 strains that were inoculated on the leguminous metallophytes A. vulneraria and Lotus corniculatus grown in diluted mine spoil (Zn 34,653; Pb 6842; and Cd 242, all in mg kg-1). All strains were affiliated to Pseudomonas spp. (except two), synthetised auxins and siderophores and solubilised P (except three), and seven of them were ACCd positive. The inoculation effects (shoot-root-nodule biomass, chlorophyll content) depended on legume species and bacterial strain genotype. Phytostimulation scores were unrelated to siderophore/auxin synthesis and P solubilisation rates. Inoculations of the strain nos. 17-43 triggered a 1.2-fold significant increase in the chlorophyll content of A. vulneraria. Chlorophyll content and root biomass of L. corniculatus were significantly increased following the inoculations of the strain nos. 17-22 (1.5-1.4-fold, respectively). The strongest positive effects were related to increases in the nodule biomass of L. corniculatus in the presence of three ACCd-positive strains (1.8-fold), one of which was the highest auxin producer. These data suggest to focus on interactions between ACCd activity and auxin synthesis to enhance nodulation of metallicolous legumes.
Plan de classementBiotechnologies [084] ; Sciences du monde végétal [076] ; Etudes, transformation, conservation du milieu naturel [082] ; Pédologie [068]
Descr. géo.FRANCE
LocalisationFonds IRD [F B010069999]
Identifiant IRDfdi:010069999
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010069999

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