Journal
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
Volume 18, Issue 2, Pages 164-170Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2015.1073670
Keywords
heavy metals; ion interactions; phytoextraction; phytoremediation; willows
Categories
Ask authors/readers for more resources
Evidence exists that Cd and certain nutrient elements, such as Fe and Mg, could share similar mechanisms of plant uptake and accumulation. Here we report that Mg and Fe deficiency in mature plants of Salix viminalis, grown in hydroponic solutions containing 5 mu g ml(-1) of Cd, caused a significant increase in Cd accumulation in roots, stems and leaves. Cd (mu g g(-1) dry weight) was determined following three treatments: 1) Cd treatment in complete nutrient solution; 2) Cd treatment with Fe deficiency; and 3) Cd treatment with Mg deficiency, yielding, respectively: in young leaves (65.3, 76.1, and 92.2), mature leaves (51.5 to 76.3 and 87.1), upper stems (80.6, 116.8, and 130.6) lower stems (67.2, 119, and 102.3), roots (377.1, 744.8, and 442,5). Our results suggest that Cd utilizes the same uptake and transport pathways as Mg and Fe. Evidence exists that Mg and Fe uptake and translocation could be further facilitated by plants as an adaptive response to deficiency of these elements. Such physiological reaction could additionally stimulate Cd accumulation. Although Cd uptake was mostly confined in roots, high Cd content in aerial plant parts (51.5-130.6 mu g g(-1)) indicates that the analysed Salix viminalis genotype is suitable for phytoextraction.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available