Contrasting effects of pyoverdine on the phytoextraction of Cu and Cd in a calcareous soil

Chemosphere
J Y CornuThierry Lebeau

Abstract

Enhanced metal phytoextraction by the use of siderophore-producing bacteria (SPB) has received a lot of attention in the past decade. Bacterial siderophores are able to bind a wide range of metals other than iron and thus should enhance their phytoavailability in contaminated matrices. However, the impact of bacterial siderophores in the soil-plant transfer of metals is not yet fully elucidated, as underlined by the opposing results reported in the literature regarding the efficiency of coupling phytoextraction with bioaugmentation by SPB. The present study focuses on one bacterial siderophore, the pyoverdine (Pvd), produced by Pseudomonas aeruginosa. The coordination properties of Pvd towards Cd(II) and Cu(II) were determined and the effect of Pvd supply was assessed on (i) the mobility (CaCl2 extractions), (ii) the phytoavailability (DGT measurements) and (iii) the phytoextraction of Cd and Cu, in a calcareous soil. The stability constant of Pvd-Cu (KL'Cu=10(20.1)) was found much higher than that of Pvd-Cd (KL'Cd=10(8.2)). The major finding was the agreement observed between Pvd coordination properties and Pvd impact on metals phytoextraction. Pyoverdine, supplied at 250 μmol kg(-1) soil, enhanced the mobility, the phytoavail...Continue Reading

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Citations

Jun 5, 2015·Journal of Applied Microbiology·A M BraudT Lebeau
Aug 30, 2014·Environmental Science and Pollution Research International·C FerretV A Geoffroy
May 19, 2018·Journal of Basic Microbiology·Dominika ThiemKatarzyna Hrynkiewicz
Apr 21, 2018·Molecular Plant Pathology·Young Cheol Kim, Anne J Anderson
Oct 25, 2017·Environmental Geochemistry and Health·Seyed Majid MousaviAli Asghar Zolfaghari
Jan 4, 2017·World Journal of Microbiology & Biotechnology·Jean-Yves CornuThierry Lebeau
Aug 19, 2018·World Journal of Microbiology & Biotechnology·Maria L FerreiraDiana L Vullo
May 13, 2018·Environmental Science and Pollution Research International·Alice HazotteThierry Lebeau
Mar 24, 2021·Environmental Science and Pollution Research International·Jean-Yves CornuThierry Lebeau
Mar 21, 2017·The Science of the Total Environment·J Y CornuT Lebeau
Feb 2, 2018·Environmental Science & Technology·Xiaoyu GaoGregory V Lowry

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