Back to Search
Start Over
Phytoremediation of Metal Contaminated Soil Using Willow: Exploiting Plant-Associated Bacteria to Improve Biomass Production and Metal Uptake.
- Source :
-
International journal of phytoremediation [Int J Phytoremediation] 2015; Vol. 17 (11), pp. 1123-36. - Publication Year :
- 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.
Details
- Language :
- English
- ISSN :
- 1549-7879
- Volume :
- 17
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- International journal of phytoremediation
- Publication Type :
- Academic Journal
- Accession number :
- 25942689
- Full Text :
- https://doi.org/10.1080/15226514.2015.1045129