Abstract
Phytoextraction of heavy metals is a technology that is increasingly studied for several years since it is more ecological and cheaper than chemical cleaning. The first plant species used for this process were hyperaccumulators, i.e., plants that are able to store particularly high amounts of heavy metals in aboveground organs. Hyperaccumulators are mainly herbaceous species; therefore, woody species now represent attractive models since they have a higher biomass and a more important root system to decontaminate soils deeper than herbaceous plants. Currently, research is mainly focused on angiosperm trees with a high growth rate such as poplars or willows. However, conifers could be an interesting species under certain conditions, particularly for polluted sites localized in cold areas. This chapter provides an update on studies related to the phytoextraction of heavy metals by conifers. It presents physiological responses of conifers to these pollutants, distribution of heavy metals in these trees, and the efficiency of phytoextraction. Moreover, several strategies are possible to improve the process of phytoextraction (bioavailability of heavy metals in soils and root absorption) and are thus presented in this chapter.
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Saladin, G. (2015). Phytoextraction of Heavy Metals: The Potential Efficiency of Conifers. In: Sherameti, I., Varma, A. (eds) Heavy Metal Contamination of Soils. Soil Biology, vol 44. Springer, Cham. https://doi.org/10.1007/978-3-319-14526-6_18
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