Specificity of heavy metals accumulation in two annual halophytes (Amaranthaceae) with different mechanisms of salt accumulation under natural conditions
E. V. Shuyskaya1, R. F. Khasanova2,3, Z. F. Rakhmankulova1, M. Yu. Prokofieva1, L. T. Saidova1, Ya. T. Suyundukov3
1Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
2Ufa Branch of the Russian Academy of Sciences, Experimental Station, Chernolesovskiy, Russia
3Federal State Budgetry Educational Institution of Higher Education "Ufa University of Science and Technology", Sibay, Russia
Keywords: Atriplex tatarica, Sedobassia sedoides, halophytes, heavy metals, contaminated soils, nickel, cadmium
Abstract
The accumulation features of heavy metals (Cu, Zn, Fe, Ni, Mn, Cd, Co, Pb) were studied in two annual halophytes, Sedobassia sedoides and Atriplex tatarica, growing naturally in contaminated soils (exceeding MAC values for Zn, Cd, Ni, Cu). The ability to accumulate heavy metals from the soil, evaluated as the ratio of metal concentration in the root to soil metal concentration (BF), was high and similar for both species, except for Ni and Cd. High values of BF and TF of Ni (ability to translocate the metal from the root to the shoot), as well as the positive correlation of translocation degree with the rate of Ni bioaccumulation in A. tatarica, make this species promising for soil phytostabilization. S. sedoides showed higher efficiency in the accumulation and translocation of Cd, as well as resistance to high/toxic concentrations of Cd in shoots, which makes this species promising for phytoremediation of Cd from soil. Both investigated plant species demonstrated the ability to accumulate Cu, Mn, and Fe in toxic concentrations.
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