Investigation of Phytoextraction Coefficient Different Combination of Heavy Metals in Barley and Alfalfa

Authors: F. Zaefarian, M. Rezvani, F. Rejali, M.R. Ardakani

Abstract:

Two seperate experiments by barley and alfalfa were conducted to a 2×8 factorial completely randomised design, with four replicates. Factors were inoculation (M) with Gomus mosseae or uninoculation (M0) and seven levels of contaminants (Co, Cd, Pb and combinations) plus an uncontaminated control treatment (C). Heavy metals in plant tissues and soil were quantified by Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) (Variant- Liberty 150AX Turbo). Phytoextraction coefficient of contaminants calculated by concentration of heavy metals in the shoot (mgkg-1) / concentration of heavy metals in soil (mgkg-1). In the barley, the highest rate of phytoextraction coefficient of Pb, Cd and Co was in M0Pb, M0PbCoCd and MCo, respectively (P<0.05). In the alfalfa plants, the highest phytoextraction coefficient of Cd, Co and Pb obtained in the treatments M0CoCd, M0Co and M0PbCd, respectively.

Keywords: phytoextraction coefficient, heavy metals, barley, alfalfa

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058849

References:

[1] Environmental Investments: The Cost of a Clean Environment. US Environmental Protection Agency (EPA). (ed EPA-230-11-90-083) 5 (US Government Printing Office, Washington, D.C. 1990
[2] P. Guilizzoni, The role of heavy metals and toxic materials in the physiological ecology of submersed macrophytes. Aquatic Bio. 1991, 41: 87-109.
[3] D.E. Salt, M. Blaylock, P.B.A.N. Kumar, V. Dushenkov, B.D. Ensley, I. Chet, and I. Raskin. Phytoremediation: a novel strategy for the removal of toxic metal from the environment using plants. Biotech. 1995, 13: 468-474.
[4] P. B.A.N. Kumar, V. Dushenkov, H. Motto, and I. Raskin. PhytoextractionÔÇöthe use of plants to remove heavy metals from soils. Environ. Sci. Technol. 1995, 29: 1232-1238.
[5] M.M. Lasat. Phytoextraction of toxic metals: a review of biological mechanisms. J. Environ. Qual. 2002, 31: 109-120.