Zinc Accumulation Potential in One Year Old Seedlings of Ornamental Palm

Aim & back ground: Nowadays, one of the major issues in the world is cleaning up soils contaminated with inorganic pollutants. Phytoremediation is one of the methods that due to economic reasons and environmental friendly action which attracted much attention in recent decades. The aim of this study: To assess the potential Zn accumulation in different parts of ornamental palm. In this study one year old ornamental palm seedlings in a randomized design with three repetition, were exposed to ZnSO4 in 4 different concentrations: 0, 50, 250 and 500 (mg Zn2+ L-1) for 45 days. Subsequently Zn2+ uptake was quantified in roots, shoots and leaves of the seedlings by Atomic Absorption Spectroscopy (AAS). In addition, some morphological and physiological parameters such as biomass production, shoots and roots length, plant appearance and some other elements were measured. The results of analysis of variance (ANOVA) showed that the traits such as fresh and dry weight tolerance value, collar diameter, plant height, tolerance stress, index of plant resistance, relative water content and deficiency saturated absorption cell, had been significantly effected by Zinc treatments. The results also showed that ornamental Palm seedlings have the ability to accumulate zinc manifold in roots than shoots and leaves. In addition, the species has the coefficients of bioaccumulate more and transport factors less than one unit. Based on these results, we can recommend the ornamental Palm as stabilizer species for the cleanup of contaminated soils with zinc heavy metal.