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dc.contributor.authorMa, Ying-
dc.contributor.authorRajkumar, Mani-
dc.contributor.authorFreitas, Helena-
dc.identifier.citationJournal of Environmental Management. In Press, Corrected Proof:en_US
dc.description.abstractIn this study, a copper-resistant plant growth promoting bacterial (PGPB) strain Ax10 was isolated from a Cu mine soil to assess its plant growth promotion and copper uptake in Brassica juncea. The strain Ax10 tolerated concentrations up to 600 mg Cu L-1 on a Luria-Bertani (LB) agar medium and utilized 1-aminocyclopropane-1-carboxylic acid (ACC) as a sole N source in DF salts minimal medium. The strain Ax10 was characterized as Achromobacter xylosoxidans based on its 16S rDNA sequence homology (99%). The bacterium A. xylosoxidans Ax10 has also exhibited the capability of producing indole acetic acid (IAA) (6.4 [mu]g mL-1), and solubilizing inorganic phosphate (89.6 [mu]g mL-1) in specific culture media. In pot experiments, inoculation of A. xylosoxidans Ax10 significantly increased the root length, shoot length, fresh weight and dry weight of B. juncea plants compared to the control. This effect can be attributed to the utilization of ACC, production of IAA and solubilization of phosphate. Furthermore, A. xylosoxidans Ax10 inoculation significantly improved Cu uptake by B. juncea. Owing to its wide action spectrum, the Cu-resistant A. xylosoxidans Ax10 could serve as an effective metal sequestering and growth promoting bioinoculant for plants in Cu-stressed soil. The present study has provided a new insight into the phytoremediation of Cu-contaminated soil.en_US
dc.subjectBrassica junceaen_US
dc.subjectPhosphate solubilizationen_US
dc.titleInoculation of plant growth promoting bacterium Achromobacter xylosoxidans strain Ax10 for the improvement of copper phytoextraction by Brassica junceaen_US
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Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais
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