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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/19827

Title: Phytoremediation of Metal Contaminated Soil Using Willow: Exploiting Plant-Associated Bacteria to Improve Biomass Production and Metal Uptake
Authors: Janssen, Jolien
Weyens, Nele
Croes, Sarah
Beckers, Bram
Meiresonne, Linda
Van Peteghem, Pierre
Carleer, Robert
Vangronsveld, Jaco
Issue Date: 2015
Abstract: Short rotation coppice (SRC) of willow and poplar is proposed for economic valorization and concurrently as remediation strategy for metal contaminated land in northeast-Belgium. However, metal phytoextraction appears insufficient to effectuate rapid reduction of soil metal contents. To increase both biomass production and metal accumulation of SRC, two strategies are proposed: (i) in situ selection of the best performing clones and (ii) bioaugmentation of these clones with beneficial plant-associated bacteria. Based on field data, two experimental willow clones, a Salix viminalis and a Salix alba x alba clone, were selected. Compared to the best performing commercial clones, considerable increases in stem metal extraction were achieved (up to 74% for Cd and 91% for Zn). From the selected clones, plant-associated bacteria were isolated and identified. All strains were subsequently screened for their plant growth-promoting and metal uptake enhancing traits. Five strains were selected for a greenhouse inoculation experiment with the selected clones planted in Cd-Zn-Pb contaminated soil. Extraction potential tended to increase after inoculation of S. viminalis plants with a Rahnella sp. strain due to a significantly increased twig biomass. However, although bacterial strains showing beneficial traits in vitro were used for inoculation, increments in extraction potential were not always observed.
Notes: [Janssen, Jolien; Weyens, Nele; Croes, Sarah; Beckers, Bram; Carleer, Robert; Vangronsveld, Jaco] Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium. [Meiresonne, Linda; Van Peteghem, Pierre] Inst Nat & Forest Res INBO Gaverstr, Geraardsbergen, Belgium.
URI: http://hdl.handle.net/1942/19827
DOI: 10.1080/15226514.2015.1045129
ISI #: 000361624900013
ISSN: 1522-6514
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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