Effects of EDTA on Cr+3 Uptake, Accumulation, and Biomass in Nasturtium officinale (Watercress)

Didem Aydin, Omer Faruk Coskun

Ekoloji, 2013, Issue 87, Pages: 16-23

DOI: https://doi.org/10.5053/ekoloji.2013.873

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Abstract

A pot study was used to examine the effects of ethylenediaminetetraacetic acid (EDTA) on the growth potential, uptake, and mobilization of Cr by Watercress (Nasturtium officinale) in contaminated water at different concentration levels of the chelating agent EDTA (0, 10-5, and 10-4 M) and four concentration levels of Cr (0, 1, 3, and 10 mgL-1). The EDTA resulted in more solubilization of Cr in water. The application of EDTA 15 d prior to harvest increased the amount of Cr accumulated in watercress with more Cr accumulated by the plants from the media. Nasturtium officinale accumulated high Cr concentration (317 mgkg-1) in the root at a concentration of 10 mgL-1 Cr3+ and 104- M EDTA after 15 d growth. The application of EDTA had inhibitory effects on the root and shoot dry biomass compared with that in the control. This plant can be used as potential species for chelate-assisted Cr phytoremediation.

Keywords

biomass, chromium, EDTA, Nasturtium officinale, Phytoexraction

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