Recently, phytoremediation has emerged as a novel approach to
clean up metal-polluted soils in which plants are used to transfer toxic
metals from soils to shoots (Surriya et al., 2015). According to these
authors, over 400 taxa of plant hyper accumulators of heavy metals
have been identified, but most of them are low biomass producers and
exotic species. However, according to Meers et al. (2010),