Effect of cadmium supply levels to cadmium accumulation by Salix

The present investigation reports the results of the cadmium accumulated by Salix matsudana, S. alba var. Tristis and S. babylonica in a pot experiment at six different levels of cadmium supply [0, 0.5, 2, 6, 25, 60 mg/kg]. All tested Salix species showed the different abilities to remove cadmium, which depend on species and concentrations level. Cadmium accumulated by the leaves, twigs and roots linearly increased with increasing cadmium supply levels. The higher concentration cadmium treatments significantly promoted the cadmium accumulation. S. matsudana always performed the stronger ability of cadmium accumulation under different cadmium supply treatments, while S. alba var. Tristis and S. babylonica had the poorer accumulation ability. Cadmium in soil was more intensively absorbed in the leaves and twigs for all three Salix species, was not retained in roots and was transferred to aboveground plant tissues. The results indicated that Salix has an excellent potential for cadmium phytoremediation because of its high accumulation ability

Effects of chromium on seed germination, root elongation and coleoptiles growth in six pulses

The ecotoxicological effects of Cr[2+] on germination and early seedling growth of six pulses were investigated. Seeds of these plants were exposed to seven different concentrations of Cr [0-3.2 mM]. The results indicated that root elongation and coleoptile growth of six pulse plants were more sensitive than seed germination for measurement of the toxic of Cr[2+] pollutions. Different species show different levels of tolerance to Cr[2+] pollution. Lablab purpureus and Glycine max are the most sensitive to Cr[2+], their germination percentage, root and coleoptile length were significantly lower than other tested species, by contrast, Lathyrus odoratus and Dumasia villasa are the most resist species, their germination and seedling growth almost were not influenced by Cr[2+] pollution significantly comparing the control. There were significantly negatively correlations between seedling growth and increasing concentration of Cr[2+] for Glvcine max, Vigna radiate and Lablab purpureus. The significantly negative correlations between germination and increasing concentration of Cr[2+] were shown for Glycine max, Vigna radiate and V. angularis