Cadmium Uptake by Lettuce (<i>Lactuca sativa</i>L.) as Basis for Derivation of Risk Limits in Soils

Melo, Leônidas Carrijo Azevedo; Alleoni, Luís Reynaldo Ferracciú; Swartjes, Frank A.; Silva, Evandro Barbosa da

doi:10.1080/10807039.2012.688716

Cited by 8 publications

(7 citation statements)

References 28 publications

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“…Szomolányi & Lehoczky (2002) verified a decrease in Cd contents in L. sativa leaves in different soils after liming and attributed these decreases to increased adsorption of Cd to soil particles. Similarly, Melo et al (2012) observed that liming reduced Cd concentration in L. sativa in a medium textured Ultisol, but had no effect in a clay-rich Oxisol, demonstrating the importance of clay content as well as soil pH for regulating Cd availability to plants. Araújo et al (2002) found a high correlation between pH and Cd adsorption, as well as adsorption of other metals, in Oxisols.…”

Section: Resultsmentioning

confidence: 91%

Influences of Soil pH on Cadmium Toxicity to Eight Plant Species

Oliveira

Melo

Abreu

et al. 2024

Ecotoxicol. Environ. Contam.

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Soil pollution by heavy metals affects soil quality worldwide. Cadmium (Cd) is of special concern because it might transfer from soil to plants, especially under acidic conditions, causing toxicity. This work aimed to evaluate the LC 50 (lethal concentration to 50% of studied population), NOEC (no observed effects concentration) and LOEC (lowest observed effects concentration), by measuring the germination and growth of eight plant species (Beta vulgaris, Daucus carota, Lactuca sativa, Phaseolus vulgaris; Avena strigosa, Oryza sativa, Triticum aestivum and Zea mays) in soil under increasing Cd concentrations (0, 10, 40, 80, 160, and 320 mg kg-1) and two levels of acidity. Increasing the soil pH (from 4.1 to 6.4) by liming alleviated Cd toxicity and had a positive impact on seedling growth of all plant species studied. Germination was a less responsive endpoint and only the most sensitive species (L. sativa, B. and D. carota) were affected under the most acidic condition. These results were confirmed by the lower values found for LOEC and LC 50 in these species regardless of the soil pH. Sensitive species are thus recommended as indicators of soil contamination in ecotoxicological studies, in which dicotyledonous species (e. g. L. sativa and B. vulgaris) are more suitable for risk assessments in Cd-contaminated soils at low concentrations, whilst monocotyledons (e. g. Z. mays) are more adequate for higher Cd concentrations (≥ 80 mg kg-1). Increasing soil pH by liming was demonstrated to be an efficient method in alleviating Cd toxicity in seedling growth.

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Section: Resultsmentioning

confidence: 91%

Influences of Soil pH on Cadmium Toxicity to Eight Plant Species

Oliveira

Melo

Abreu

et al. 2024

Ecotoxicol. Environ. Contam.

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“…This difference in Cd uptake by the rocket plants is related to differences in clay, SOM and Fe and Al oxide contents, which act as Cd sorbents (Fontes and Santos, 2010;Havlin et al, 2005;Melo et al, 2012;Naidu et al, 1994).…”

Section: Resultsmentioning

confidence: 99%

“…On some occasions, plants may have been contaminated but showed no visual signs of toxicity (Jiang et al, 2010). Lettuce (Lactuca sativa L.), for instance, is known as a Cd "accumulating" plant, because it is not sensitive to the toxic effects of Cd at low and medium concentrations in the soil (Alexander et al, 2006;Melo et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Cadmium phytoavailability in soils and evaluation of extractant effectiveness using an isotope technique

Guerra

Trevizam²,

Fior

et al. 2014

Sci. agric. (Piracicaba, Braz.)

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“…Other authors found no significant difference in soil Cd levels after phosphorus fertilizer treatment [8,9]. Cd availability in soils is substantially affected by soil type [2,10,11], primarily pH and organic matter content [12,13].…”

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confidence: 93%

Cadmium Content and Accumulation in Lettuce Grown on Different Types of Soil

Bošković-Rakočević¹,

Pavlovic²,

Đurić³

et al. 2019

Rev. Chim.

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This study was conducted on a pseudogley (pH 5.0) and a vertisol (pH 6.9) to analyze their total and available Cd levels and Cd accumulation by lettuce for risk assessment of potential human health impacts. Total Cd levels in both soil types were below maximum allowable concentrations, and showed a high dependence on soil pH (R=-0.974). Monoammonium phosphate (MAP) fertilizers containing various amounts of cadmium led to an increase in cadmium uptake, with higher concentrations accumulated in lettuce roots than in leaves. The transfer factor showed that Cd uptake from the pseudogley was much higher than from the vertisol, and its values indicated that lettuce is a cadmium hyperaccumulator. Lettuce head weight decreased with increasing cadmium rates and was highly negatively correlated with Cd concentration in the leaves (R=-0.818).

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Cadmium Uptake by Lettuce (Lactuca sativaL.) as Basis for Derivation of Risk Limits in Soils

Cited by 8 publications

References 28 publications

Influences of Soil pH on Cadmium Toxicity to Eight Plant Species

Influences of Soil pH on Cadmium Toxicity to Eight Plant Species

Cadmium phytoavailability in soils and evaluation of extractant effectiveness using an isotope technique

Cadmium Content and Accumulation in Lettuce Grown on Different Types of Soil

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