Effect of pH and EDTA on Pb Accumulation in Zea mays Seedlings

Heidari, Reza; ., M. Khayami; Farboodnia, T.

doi:10.3923/ja.2005.49.54

Cited by 10 publications

(1 citation statement)

References 17 publications

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“…A negative correlation was also found by Hu et al (2019) for P. hopeiensis in soils contaminated by several metals. We found significant stem Pb accumulation under increasing alkalinity, which is not confirmed by previous papers (Heidari et al 2005;Hu et al 2019). In line with the transition of soil pH from acidic to alkaline ranges, Pb becomes even more immobile, exerting its toxic effects in a less pronounced manner on plant development; thereby physiological processes such as translocation mechanisms are more favored, enabling a relatively high degree of Pb flux into leaves (Brennan and Shelley 1999;Tangahu et al 2011;Thakur et al 2016).…”

Section: Correlation Between Soil Ph and Metal Accumulation In Populu...supporting

confidence: 43%

Heavy metal uptake by plant parts of Populus species: a meta-analysis

Tőzsér

Horváth

Simon

et al. 2023

Environ Sci Pollut Res

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Populus species are well documented for being potentially suitable for phytoremediation purposes regarding their accumulation characteristics. However, published results are contradictory. Based on the data gathered during an extensive literature search, we aimed to assess and revise the metal accumulation potential in the root, stem, and leaf of Populus species growing in contaminated soils, with meta-analysis. We evaluated the influences of pollution level, soil pH, and exposure time on the metal uptake patterns. We found accumulations of Cd, Cr, Cu, Pb, and Zn to be significant in each plant part, while that was only moderate for Ni, and limited for Mn. By calculating the soil pollution index (PI), we observed significantly intensive, PI-independent accumulation for Cd, Cr, Cu, Ni, Pb, and Zn. A decrease in soil pH significantly increased the uptake of Mn and significantly decreased the accumulation of Pb in the stem. Metal uptake was significantly influenced by exposure time as well; Cd concentration was significantly decreased in the stem, while concentrations of Cr in the stem and leaf, and Mn in the stem were significantly increased with time. These aforementioned findings support a well-founded metal-and-growth condition-specific application of poplars in phytoremediation processes, also triggering further in-depth assessments to enhance the efficiency of relevant poplar-based technologies.

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Section: Correlation Between Soil Ph and Metal Accumulation In Populu...supporting

confidence: 43%

Heavy metal uptake by plant parts of Populus species: a meta-analysis

Tőzsér

Horváth

Simon

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

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Modeling the plant–soil interaction in presence of heavy metal pollution and acidity variations

Guala

Vega

Covelo

2012

Environ Monit Assess

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On a mathematical interaction model, developed to model metal uptake by plants and the effects on their growth, we introduce a modification which considers also effects on variations of acidity in soil. The model relates the dynamics of the uptake of metals from soil to plants and also variations of uptake according to the acidity level. Two types of relationships are considered: total and available metal content. We suppose simple mathematical assumptions in order to get as simple as possible expressions with the aim of being easily tested in experimental problems. This work introduces modifications to two versions of the model: on the one hand, the expression of the relationship between the metal in soil and the concentration of the metal in plants and, on the other hand, the relationship between the metal in the soil and total amount of the metal in plants. The fine difference of both versions is fundamental at the moment to consider the tolerance and capacity of accumulation of pollutants in the biomass from the soil.

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EDTA-enhanced phytoremediation of contaminated calcareous soils: heavy metal bioavailability, extractability, and uptake by maize and sesbania

Suthar

Memon

Mahmood‐ul‐Hassan

2014

Environ Monit Assess

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Natural and chemically enhanced phytoextraction potentials of maize (Zea mays L.) and sesbania (Sesbania aculeata Willd.) were explored by growing them on two soils contaminated with heavy metals. The soils, Gujranwala (fine, loamy, mixed, hyperthermic Udic Haplustalf) and Pacca (fine, mixed, hyperthermic Ustollic Camborthid), were amended with varying amounts of ethylenediaminetetraacetic acid (EDTA) chelating agent, at 0, 1.25, 2.5, and 5.0 mM kg(-1) soil to enhance metal solubility. The EDTA was applied in two split applications at 46 and 60 days after sowing (DAS). The plants were harvested at 75 DAS. Addition of EDTA significantly increased the lead (Pb) and cadmium (Cd) concentrations in roots and shoots, uptake, bioconcentration factor, and phytoextraction rate over the control. Furthermore, addition of EDTA also significantly increased the soluble fractions of Pb and Cd in soil over the controls; the maximum increase of Pb and Cd was 13.1-fold and 3.1-fold, respectively, with addition of 5.0 mM EDTA kg(-1)soil. Similarly, the maximum Pb and Cd root and shoot concentrations, translocation, bioconcentration, and phytoextraction efficiency were observed at 5.0 mM EDTA kg(-1) soil. The results suggest that both crops can successfully be used for phytoremediation of metal-contaminated calcareous soils.

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Effect of pH and EDTA on Pb Accumulation in Zea mays Seedlings

Cited by 10 publications

References 17 publications

Heavy metal uptake by plant parts of Populus species: a meta-analysis

Heavy metal uptake by plant parts of Populus species: a meta-analysis

Modeling the plant–soil interaction in presence of heavy metal pollution and acidity variations

EDTA-enhanced phytoremediation of contaminated calcareous soils: heavy metal bioavailability, extractability, and uptake by maize and sesbania

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