Using Salix spp. in phytostabilization of metal pollution in soils : an example of phytoremediation appropriate to the brownfields of Wallonia
- Evlard, A. , Druart, P. & Collinet, G. (2014). Using Salix spp. in phytostabilization of metal pollution in soils : an example of phytoremediation appropriate to the brownfields of Wallonia. Poster in: 19th National Symposium on Applied Biological Sciences. Gembloux, Belgium, 02/07.
|Using Salix spp. in phytostabilization of metal pollution in soils : an example of phytoremediation appropriate to the brownfields of Wallonia
|19th National Symposium on Applied Biological Sciences.
|Salix, phytoremediation, heavy metals
|Since the phytoremediation concept appeared, i.e. use of plants to stabilize and/or extract pollutants, researches have been put into studying the efficiency of woody plants in metal extraction. Willows, as fast growing plants and because of their tolerance to difficult edaphic conditions, have been particularly well investigated. In this investigation, the essays were done on Salix clones, which come from a Walloon collection (ECOLIRIMED project). The first objective was to study the metal tolerance of these local clones by considering their ability to extract the pollutants and their growth (phenotypic approach). The second value of this study lies in the second objective which aims to complete these phenotypic criteria with physiological and proteomic criteria, rarely used for willows. The combination of these approaches gives an expand view of metal tolerance: as phenotypical parameters answer the extraction ability challenge, physiological and proteomic ones give answers linked to the health of these Salix clones growing in presence of metals. Our results indicate that the clones that produced less biomass showed the highest metal concentrations. However, they showed the same tolerance as the highest producers. Also, growth reduction indicates metal tolerance. Finally, by comparing metal concentrations obtained in the twigs to results obtained during the literature of the last two decades, we reconsidered the use of Salix potential in phytoextraction.
|Evlard, A., Druart, P., Collinet, G.