EDTA and citrate impact on heavy metals phytoremediation using paulownia hybrids Online publication date: Wed, 04-Jul-2018
by K. Miladinova-Georgieva; Katya Ivanova; Teodora Georgieva; Maria Geneva; Petar Petrov; Ira Stancheva; Yuliana Markovska
International Journal of Environment and Pollution (IJEP), Vol. 63, No. 1/2, 2018
Abstract: The influence of the EDTA and citrate addition to the industrially polluted soil on phytoextraction of heavy metals, leaf anatomy, and gas exchange parameters of two Paulownia hybrid lines (Paulownia tomentosa x fortunei - TF 01 and Paulownia elongata x fortunei - EF 02) was evaluated. Both lines were accumulators of Cu, Zn and Cd because bioaccumulation factor values were higher than 1.00. The levels of heavy metal accumulation in shoots allowed supposing that both hybrids may be used for phytoremediation since transfer factors for Pb and Zn in hybrid - TF 01 were higher than 1.00, while in hybrid - EF 02 - for Zn only. Application of EDTA produced heavy metal accumulation in hybrid lines higher than those obtained with citrate. Treatment with 1 mM EDTA displayed a protective effect on leaf development in both lines and overcame damages in its morphological structure caused by heavy metal stress.
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