Using phosphate rock to immobilize metals in soil and increase arsenic uptake by hyperaccumulator Pteris vittata

Fayiga, Abioye O.; Lena, Q.

doi:10.1016/j.scitotenv.2005.06.001

Cited by 169 publications

(79 citation statements)

References 18 publications

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“…These results support the observations that arsenate competes uptake transporter with phosphate and increasing of external phosphate can alleviate As toxicity (Abedin et al, 2002;Wang et al, 2002;Geng et al, 2005). However, P-fertilizer increased As uptake in P. calomelanos and P. vittata (Jankong et al, 2007;Fayiga and Ma, 2006). This result possibly caused by the enhanced mobility of As in the soil which occurred by the replacement of As by P from the soil binding site as a competitive anion exchange (Smith et al, 2002).…”

Section: External P Addition Alleviated As Toxicity Of Rice Seedlingssupporting

confidence: 82%

“…Fayiga et al (2008) showed that it was possible to optimize plant As removal by adjusting nutrients in the growth medium. Phosphorusfertilizer increased As uptake in P. calomelanos and P. vittata, which can be used as a cost-effective amendment for As polluted soils (Jankong et al, 2007;Fayiga and Ma, 2006). However, so far, no experimental data have shown the effects of external fertilization on As uptake and accumulation by rice plants after P starvation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of external and internal phosphate status on arsenic toxicity and accumulation in rice seedlings

Wang

Duan

2009

Journal of Environmental Sciences

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Phosphorus (P) deficiency is thought to exacerbate the arsenic (As) phytotoxicity in paddy rice. The experiments were conducted to investigate the effects of external phosphate supply on As accumulation in rice and its toxicity under phosphate deficiency conditions. Rice seedlings pretreated with a phosphorus deficient nutrient solution (-P) for 14 d accumulated more As than those pretreated with a normal phosphorus supply nutrient solution (+P). Rice protreated with -P showed As toxicity symptoms after being exposed to 50 μmol/L arsenate for 4 h, while +P rice did not show any toxicity symptoms. Arsenic toxicity symptoms can be alleviated by increasing external P concentrations. The arsenate uptake rate and accumulation corresponded with the As toxicity in rice plants. Arsenic concentrations in rice roots decreased with increasing external phosphate concentrations. The lowest As accumulation and the highest P accumulation were found when the external P concentration reached 100 μmol/L. In short, P deficiency increased the sensitivity of rice to arsenate and increasing of external phosphate supply could alleviate As toxicity.

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Section: External P Addition Alleviated As Toxicity Of Rice Seedlingssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Effect of external and internal phosphate status on arsenic toxicity and accumulation in rice seedlings

Wang

Duan

2009

Journal of Environmental Sciences

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“…Whenever C shoot is equal or greater than C root (TF > 1), metals are effectively translocated from root to the shoot, whereas root compartmentation occurs whenever C root is greater than C shoot (Baker and Brooks 1989;Zhang et al 2002;Fayiga and Ma 2006).…”

Section: Contamination Indexesmentioning

confidence: 99%

Soilless system on peat reduce trace metals in urban-grown food: unexpected evidence for a soil origin of plant contamination

Pennisi

Orsini

Gasperi

et al. 2016

Agron. Sustain. Dev.

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Urban horticulture is increasingly popular for social and economic benefits. However, edible urban crops may be contaminated by airborne pollutants, thus leading to serious health risks. Therefore, a better understanding of contamination risks of urban cultivation is needed in order to define safe practices. In particular, whereas it is commonly accepted that the contamination of urban-grown food comes from airborne pollutants, little is known on a possible contamination by soils. Here, we studied trace metal risk in horticultural crops grown in an experimental urban allotment garden in Bologna, Italy. Seven experiments were conducted between June and November 2015 on tomato, sweet basil, onion, lettuce, kale, bulb fennel and radish. Treatments included two growing systems, soil and soilless, and two fertilization managements, mineral and organic. Trace metal concentrations were measured in soils, substrates and edible plant tissues. We identified preferentially translocated metals by partitioning analysis of tomato, sweet basil and kale. Results showed that crops grown in a soilless system have a lower metal content of −70 % for Cr, −61 % for Cu, −45 % for Cd and −81 % for Ni, compared with those grown in soil. This finding demonstrates that the major contamination risk in an urban area is unexpectedly related to soil pollution.

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“…2). According to classification reported by Zhang et al (2002) and Fayiga and Ma (2006) (Tables 2, 3). Moreover, Cd uptake depends upon transpiration rate of plant species (Mobin and Khan 2007), and it may also differ in plant species and genotypes (Metwally et al 2005).…”

Section: Tissue CD Concentration and Translocationmentioning

confidence: 99%

Organic amendments: effects on cereals growth and cadmium remediation

Ahmad

Akhtar

Zahir

et al. 2014

Int. J. Environ. Sci. Technol.

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Cadmium (Cd) is one of the toxic metals that adversely affect plant growth. Organic amendments may not only enhance nutrient status of soil, but they may also form complexes with Cd and reduce its availability to plants. This experiment was conducted to determine whether organic amendments (compost and biogas slurry) could stabilize/extract Cd and alleviate the adverse effects of Cd on the growth of two cereals, wheat and maize. Organic amendments along with four varying levels of Cd (0, 5, 20, 50 mg kg -1 soil) were prepared with soil. Effect of these amendments on tolerance indices, root/shoot dry biomass, tissue Cd concentration, Cd uptake and translocation were studied. Biogas slurry caused maximum increase in tolerance indices of wheat and maize (100-112 and 117-133 %, respectively, as compared to control), whereas compost caused significant increase in their dry biomass. Negative correlation between root dry biomass of wheat (r = -0.37) and maize (r = -0.53) to Cd revealed its suppressive effects. Dry biomass of plant correlated with organic amendments in wheat (r = 0.83-0.98), whereas weak correlation was observed in maize (r = 0.30-0.40). Compost significantly reduced Cd uptake in wheat and maize; however, it increased Cd translocation in plants. Based on the results of this study, root was the major sink of Cd when soil was amended with or without organic amendments. Biogas slurry removed 97 % Cd from artificially polluted water after 13 h at pH 6. The additions of compost in soil and biogas slurry in wastewater are recommended to stabilize/extract Cd.

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Using phosphate rock to immobilize metals in soil and increase arsenic uptake by hyperaccumulator Pteris vittata

Cited by 169 publications

References 18 publications

Effect of external and internal phosphate status on arsenic toxicity and accumulation in rice seedlings

Effect of external and internal phosphate status on arsenic toxicity and accumulation in rice seedlings

Soilless system on peat reduce trace metals in urban-grown food: unexpected evidence for a soil origin of plant contamination

Organic amendments: effects on cereals growth and cadmium remediation

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