Strategies to use phytoextraction in very acidic soil contaminated by heavy metals

Pedron, Francesca; Petruzzelli, G.; Barbafieri, Meri; Tassi, Eliana

doi:10.1016/j.chemosphere.2009.01.044

Cited by 82 publications

(25 citation statements)

References 28 publications

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“…Several studies have already shown that increasing salinity increased the metals mobility (Hatje et al, 2003;Pedron et al, 2009). In addition, increased solubility of Pb in soil will result in enhanced bioavailability and hence increased uptake of Pb by plants.…”

Section: Discussionmentioning

confidence: 99%

“…Current information available from laboratory and field experiments has indicated that increasing salinity has the potential to increase heavy metal mobility (Hatje et al, 2003;Pedron et al, 2009). Kadkhodaie et al (2012) reported that with increasing salinity, absorbable forms of heavy metals (Cd, Ni and Pb) increased in soil and consequently concentration of Cd, Ni and Pb increased in sunflower and Sudan grass when grown in such soils.…”

Section: Introductionmentioning

confidence: 99%

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Growth and Physiological Responses of Two Rice Varieties to Applied Lead in Normal and Salt-Affected Soils

Iqbal¹,

Murtaza²,

Saqib³

et al. 2015

IJAB

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To cite this paper: Iqbal, M.M., G. Murtaza, Z.A. Saqib and R. Ahmad, 2015. Growth and physiological responses of two rice varieties to applied lead in saltaffected soils. AbstractIn arid and semi-arid regions of the world, soil salinity and heavy metal pollution occurring through various natural and anthropogenic means, is becoming major threat to safe crop production. The most feasible and effective approach is screening, breeding and cultivation of food crop varieties with low toxic metal accumulation. A pot study was conducted to investigate the growth and physiological responses of rice exposed to applied lead (Pb) in normal and salt-affected soils comprising four levels of Pb (0, 50, 100 and 150 mg kg -1 soil), two rice varieties (Shaheen basmati and KS-282) and two types of soil as normal and salt-affected soils. Increasing level of Pb decreased plant height, straw and paddy yields, photosynthetic and transpiration rates and stomatal conductance, more under salt-affected conditions. The cv. Shaheen basmati showed better response for growth, yield, physiological attributes and had lower Pb concentration in straw and paddy compared to cv. KS-282, at all levels of applied Pb in both normal and salt-affected soils. Thus, Shaheen basmati was found to be grown for Pb risk-free rice production and can be a good source for future rice breeding programs with the aim to produce low Pb accumulation and salt-tolerant rice varieties.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth and Physiological Responses of Two Rice Varieties to Applied Lead in Normal and Salt-Affected Soils

Iqbal¹,

Murtaza²,

Saqib³

et al. 2015

IJAB

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“…Dry matter production of the roots and shoots was also influenced by soil pH correction ( Figure 3) for vetiver, castor bean, corn, and sunflower species in all the periods analyzed. Very acidic and contaminated soils, such as those from the area studied, make it harder to establish plants due to the high concentration of Mn and Al in the soil solution (Pedron et al, 2009;González-Alcaraz et al, 2011), low nutrient availability, and an increase in heavy metal solubility. In extreme cases, Pb phytotoxicity may even result in plant death (Boonyapookana et al, 2005), as observed for sunflower at 90 DAP without soil acidity correction (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, practices such as soil pH correction in acidic environments are fundamental for establishing plants used in phytoremediation (Clement Carrillo et al, 2005;Pedron et al, 2009;González-Alcaraz et al, 2011;Joris et al, 2012;Aragão et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Phytoextractor Potential of Cultivated Species in Industrial Area Contaminated by Lead

Nascimento

Souza

Lima

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:High growth rate is one of the criteria used for the selection of species to be used in metal phytoextraction programs. This study was carried out to characterize the growth characteristics of sunflower (Helianthus annuus L.), castor bean (Ricinus communis L.), corn (Zea mays L), and vetiver [Vetiveria zizanioides (L.) Nash] grown on a soil contaminated with lead (Pb), with and without pH correction, to improve agronomic practices regarding phytoremediation programs. The experiment was designed as a randomized block with four replications; treatments were arranged in a split-plot arrangement, with the main plot representing the species (sunflower, castor bean, corn, and vetiver), with or without pH correction and soil fertilization, and the split-plot representing harvest periods (60, 90, and 120 days after planting). After variance analysis and mean comparison analysis of the data by the Tukey test (p≤0.05), a significant effect was observed from soil pH correction for vetiver in all of the growth variables evaluated, except for the leaf area index at 120 days after planting (DAP). Castor bean and sunflower plants in soil with high acidity conditions, without pH correction (pH˂4.0), were affected by soil Pb levels. Corn plants benefited from soil pH correction and had improved results for the plant height, diameter, and leaf area variables at 60 and 90 DAP, as well as leaf area index at 60 DAP. There was no increase in these variables between the harvest periods evaluated. Regarding phytoextraction potential, corn and vetiver had the highest Pb translocation to the plant shoots at 90 DAP and were therefore considered the most suitable species for phytoremediation of the area under study. Overall, liming was essential for improving species biomass production for all the species studied in soils with high Pb availability in solution.

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“…The bioavailable fraction of Cd, Cu, Pb e Zn in soil was determined following Lindsay and Norwell [18]. The method consisted of a sequential extraction with H 2 O, KNO 3 1 M and EDTA 2 mM; in order to promote the comparison with microcosm experiments, molarity of EDTA solution was modified from the original procedure [19,20]. The bioavailable fraction of As, Tl and V was determined by extraction in ammonium acetate [21,22].…”

Section: Soil: Chemical Analysesmentioning

confidence: 99%

Ecological and Functional Evaluation of Species Candidate for Heavy Metals Phytoremediation in SIN Porto Torres (Sardinia, Italy)

Guarino¹,

Sciarrillo²

2017

J Environ Anal Toxicol

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Strategies to use phytoextraction in very acidic soil contaminated by heavy metals

Cited by 82 publications

References 28 publications

Growth and Physiological Responses of Two Rice Varieties to Applied Lead in Normal and Salt-Affected Soils

Growth and Physiological Responses of Two Rice Varieties to Applied Lead in Normal and Salt-Affected Soils

Phytoextractor Potential of Cultivated Species in Industrial Area Contaminated by Lead

Ecological and Functional Evaluation of Species Candidate for Heavy Metals Phytoremediation in SIN Porto Torres (Sardinia, Italy)

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