Arsenic in orchard and potato soils and plant tissue

Maclean, K.S.; Langille, W. M.

doi:10.1007/bf02182021

Cited by 26 publications

(10 citation statements)

References 9 publications

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“…Cadmium (Cd) and arsenic (As) are two of the most common global environmental pollutants, which enter the environment through metal mining and smelting activities, industrial and urban waste, combustion of fossil fuels, and application of agricultural fertilizers (Sneller et al, 2000;Galbraith et al, 1995;Maclean and Langille, 1981;Abedin et al, 2002aAbedin et al, , 2002b). The Cd-or As-polluted water for drinking and crop irrigation causes serious health problems to human and other organisms (Watanabe et al, 2000;Chen et al, 1995;Liao et al, 2005;Mandal et al, 1997;Quaghebeur and Rengel, 2003).…”

Section: Introductionmentioning

confidence: 99%

Genotypic Difference in Arsenic and Cadmium Accumulation by Rice Seedlings Grown in Hydroponics

Zhang

Duan

2008

Journal of Plant Nutrition

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Genotypic differences in arsenic (As) and cadmium (Cd) uptake and their translocation within rice seedlings grown in solution culture were investigated. Arsenic uptake and its translocation differed significantly between eight cultivars. The largest shoot and root As concentrations were found in cultivar 'TN1' and 'ZYQ8', while cultivar 'JX-17' had the lowest As concentration. Arsenic concentration in shoot or root of 'JX-17' was about 50% of that in cultivar 'ZYQ8'. Specific Arsenic uptake (SAU) was found significantly different between rice cultivars, which was about 2-fold higher of 'ZYQ8' than that of 'JX-17'. The Cd accumulation also differed significantly between cultivars. Rice cultivar 'JX-17' had the highest ability in Cd uptake, but the lowest ability in Cd translocation from root to shoot. The transfer factor (TF) of Cd had an important effect on Cd accumulation by rice seedlings. Arsenic can competitively inhibit P uptake by rice seedlings, P concentrations in shoots, or roots treated with As were significantly lower than those without As addition. However, the concentrations of P and As were positively correlated within these genotypes. The Cd immobilization by cell wall was an important mechanism for Cd detoxification. The cell wall bound 21-44% of total Cd in shoots and 25-59% of total Cd in roots of these tested genotypes. The genotypic differences in As and Cd uptake and translocation within rice seedlings provide the possibility of selecting and breeding genotypes and /or cultivars with reduced levels of As and Cd in rice grains.

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Section: Introductionmentioning

confidence: 99%

Genotypic Difference in Arsenic and Cadmium Accumulation by Rice Seedlings Grown in Hydroponics

Zhang

Duan

2008

Journal of Plant Nutrition

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“…Consequently, Pb and As contamination of garden soils have been a concern because of potential transfer of these toxic metals into vegetable crops. Numerous published studies have reported Pb and As concentrations in edible crops grown on historically contaminated sites such as apple orchards (Kenyon et al 1979; MacLean and Langille 1981). However, these older results may be biased by several factors that render them unreliable for present-day evaluation of potential risk.…”

Section: Introductionmentioning

confidence: 99%

Lead and Arsenic Uptake by Leafy Vegetables Grown on Contaminated Soils: Effects of Mineral and Organic Amendments

McBride

Simon

Tam

et al. 2012

Water Air Soil Pollut

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To assess strategies for mitigating Pb and As transfer into leafy vegetables from contaminated garden soils, we conducted greenhouse experiments using two field-contaminated soils amended with materials expected to reduce metal phytoavailability. Lettuce and mustard greens grown on these soils were analysed by ICP-MS, showing that some Pb and As transfer into the vegetables occurred from both soils tested, but plant Pb concentrations were highly variable among treatment replicates. Soil-to-plant transfer was more efficient for As than for Pb. Contamination of the leaves by soil particles probably accounted for most of the vegetable Pb, since plant Pb concentrations were correlated to plant tissue concentrations of the immobile soil elements Al and Fe. This correlation was not observed for vegetable As concentrations, evidence that most of the soil-to-plant transfer for this toxic metal occurred by root uptake and translocation into the above-ground tissues. A follow-up greenhouse experiment with lettuce on one of the two contaminated soils revealed a lower and less variable foliar Pb concentration than observed in the first experiment, with evidence of less soil particle contamination of the crop. This reduced transfer of Pb to the crop appeared to be a physical effect attributable to the greater biomass causing reduced overall exposure of the above-ground tissues to the soil surface. Attempts to reduce soil Pb and As solubility and plant uptake by amendment at practical rates with stabilizing materials including composts, peat, Ca phosphate, gypsum and Fe oxide, were generally unsuccessful. Only Fe oxide reduced soluble As in the soil, but this effect did not persist. Phosphate amendment rapidly increased soil As solubility but had no measurable effect on either soil Pb solubility or concentrations of Pb or As in the leafy vegetables. The ineffectiveness of these amendments in reducing Pb transfer into leafy vegetables is attributed in this study to the low initial Pb solubility of the studied soils and the fact that the primary mechanism of Pb transfer is physical contamination.

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“…Natural background levels of As are 5-6 mg kg )1 dry soil on average (Yan-Chu 1994). However, anthropogenic activities, such as pesticide use (Maclean & Langille 1981), mining (Galbraith et al 1995), or irrigation with contaminated groundwater have significantly enhanced As levels in the environment in some locations. Arsenic contamination of groundwater has been reported from many countries, with the most severe problems occurring in Bangladesh (Dhar et al 1997;Biswas et al 1998;Nickson et al 1998;Chowdhury et al 1999), West Bengal and India (Mandal et al 1996(Mandal et al , 1997, and China (Huang et al 1992;Smith et al 1992;Liangfang & Jianghong 1994;Chen et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer

Zhu

et al. 2005

Environ Geochem Health

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A pot experiment was carried out in a greenhouse to investigate the sequestration of As in iron plaques on root surface of three rice (Oryza sativa L.) cultivars. Phosphate (P) fertilization increased both plant biomass and tissue P concentrations significantly, indicating that the soils used in this study was highly P-deficient. Results from this study confirmed that low P supply improved the formation of iron plaque on rice roots. As a consequence, arsenic (As) concentrations in DCB-extracts with no P addition were significantly higher than those with P fertilization. Arsenic was highly sequestrated in iron plaque; arsenic concentration in iron was up to nearly 120 mg kg )1 , while arsenic concentrations in roots were just several mg kg -1 . Both arsenic and phosphate concentrations in iron plaque were highly positively correlated with the amounts of iron plaque (DCB-extractable Fe). Contrary to normal understanding that increasing P supply could reduced As accumulation in plants, results from the present study showed that P fertilization did not inhibit the As uptake by plants (As accumulation in aboveground), which was probably due to the fact that iron plaque formation was improved under low P conditions, thus leading to more As sequestration in the iron plaque. Thus results obtained in this study indicated that the iron plaque may inhibit the transfer of As from roots to shoots, and thus alter the P-As interaction in plant As uptake processes.

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Arsenic in orchard and potato soils and plant tissue

Cited by 26 publications

References 9 publications

Genotypic Difference in Arsenic and Cadmium Accumulation by Rice Seedlings Grown in Hydroponics

Genotypic Difference in Arsenic and Cadmium Accumulation by Rice Seedlings Grown in Hydroponics

Lead and Arsenic Uptake by Leafy Vegetables Grown on Contaminated Soils: Effects of Mineral and Organic Amendments

Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer

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