Phytoremediation of Potentially Toxic Elements in a Polluted Industrial Soil Using Poinsettia

Overview

Journal Physiol Mol Biol Plants

Specialty Biology

Date 2021 May 7

PMID 33958839

Authors

Fangmeng Xiao

Zhanying Gu

Arbi Sarkissian

Yaxin Ji

RuonanYang

Ling Yang

Qingyang Zeng

Peng Huang

Hanyue Chen

Affiliations

Soon will be listed here.

Abstract

Potentially toxic elements (PTEs) pollution has become a serious environmental threat, particularly in developing countries such as China. In response, there is a growing interest in phytoremediation studies to identify plant species as designated hyperaccumulators of PTEs in polluted soils. Poinsettia was selected as a candidate species for phytoremediation of six PTEs (Zn, Pb, Hg, Cr, As, Cu) in this study. A pot cultivation experiment (randomized incomplete block experimental design with 5 treatments and 4 blocks) was conducted using contaminated soils gathered from an industrial area in southcentral China. The bioaccumulation factor (BAF), translocation factor (TF), and bioconcentration factor were analyzed to determine the phytoremediation potential of poinsettia potted in different ratios of polluted soils. One-way ANOVA with post-hoc Tukey's test showed that poinsettia had significant uptake of Zn, Pb, Cu (BAF < 1 and TF < 1, < 0.05) and Hg (BAF < 1 and TF > 1, < 0.05). Poinsettias can therefore effectively accumulate Zn, Pb, and Cu in their lateral roots while extracting and transferring Hg into their leaves. Moreover, poinsettia exhibited tolerance towards As and Cr. Interestingly, it was also observed that PTEs can inhibit the height of potted poinsettia at a certain concentration.

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