Uptake and Phytoaccumulation of Chromium at Seedling Stage in Some Selected Tree Species

Abstract

The objective of the study was to identify shoot and root uptake of chromium (Cr) for screening tree species and recommend the best Cr accumulator. Both trivalent and hexavalent Cr species at four concentration levels 0 (control), 10, 100 and 1000 ppm were used as treatments. The growing medium was prepared by mixing 3:3:1:1, forest soil, local soil, manure, and sand, respectively. The parts of Ricinus communis showed a very good Cr storage capacity followed by Millittia ferruginea and Eucalyptus camaldulensis . The parts accumulate nearly the same amount of Cr in all the species. With regard to the uptake of Cr, Ricinus communis was the most efficient in its accumulation capacity as it was found in this study to contain with the highest level of Cr per gram of dry matter. Keywords: Chromium; Eucalyptus camaldulensis ; Millittia ferruginea ; Ricinus communis