Cadmium accumulation in wheat and maize grains from China: Interaction of soil properties, novel enrichment models and soil thresholds

Zhuang, Zhong; Niño-Savala, Andrea Giovanna; Mi, Zidong; Wan, Yanan; Su, Dechun; Li, Huafen; Fangmeier, Andreas

doi:10.1016/j.envpol.2021.116623

Cited by 49 publications

(10 citation statements)

References 62 publications

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“…In our results, only the mean Cd level (0.135 mg/kg) in wheat grains was higher than the standard limit of 0.1 mg/kg set by GB 2762-2017, indicating that there might be a health risk posed by Cd in wheat grains. Zhuang et al (28) study showed that the mean values of Cd in corn were 0.15 mg/kg, which was higher than that in our study. Our findings showed that the average F content was in a downward trend as wheat (4.053 mg/kg) > corn (2.866 mg/kg) > rice (1.993 mg/kg), respectively.…”

Section: Discussioncontrasting

confidence: 87%

Spatial distribution and risk assessment of fluorine and cadmium in rice, corn, and wheat grains in most karst regions of Guizhou province, China

Zhou²,

Zhang³

et al. 2022

Front. Nutr.

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The pollution status of crops planted in Guizhou province of Southwestern China with high background values of Fluorine (F) and Cadmium (Cd) has attracted people’s concern. The present study aimed to investigate the spatial distributions of F and Cd in rice, corn and wheat grains, and further evaluate their health risks to residents in Guizhou province. The contents of F and Cd were measured by fluoride ion-selective electrode and inductively coupled plasma mass spectrometry (ICP-MS) methods, respectively. Additionally, the inverse distance weighted (IDW) technique was conducted to analyze spatial distribution, and the health risk was estimated by target hazard quotient (THQ) and hazardous index (HI). The results indicate that Cd contents in samples varied from 0.000 to 0.463 for rice, 0.000 to 0.307 for corn, and 0.012 to 0.537 (mg/kg) for wheat, while F contents ranged from 0.825 to 5.193 (rice), 0.946 to 8.485 (corn), and 0.271 to 9.143 (wheat) mg/kg. The Cd exceeding ratios were 11.600% for rice, 13.500% for corn, and 45.100% for wheat grains, respectively. In terms of spatial distribution, high levels of F and Cd in rice were found in the northern and central in Guizhou, while Cd in corn was distributed in the eastern and F in corn were distributed in the west area of Guizhou. Moreover, the high levels of F and Cd in wheat were distributed in the western and eastern areas. The mean carcinogenic risks (R) of Cd in rice, corn, and wheat in children were 4.150 × 10–4, 1.670 × 10–4 and 3.470 × 10–4, respectively, and that in adults were 3.430 × 10–4, 0.471 × 10–4, and 2.190 × 10–4, respectively. The HI for adults in rice, corn and wheat grains were 0.756, 0.154, and 0.514, respectively, and that for children were 0.913, 0.549, and 0.814, respectively. Collectively, the potential risks produced by F and Cd to the local residents should not be ignored.

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Section: Discussioncontrasting

confidence: 87%

Spatial distribution and risk assessment of fluorine and cadmium in rice, corn, and wheat grains in most karst regions of Guizhou province, China

Zhou²,

Zhang³

et al. 2022

Front. Nutr.

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“…Possible ligands include number of small molecules, along with organic acids -carboxylates such as malate, citrate and amino acids as well as peptides and proteins. Thus, in xylem vessels, heavy metal may bind to these substances to form complexes ( Zhuang et al, 2021 ) that plausibly allow to plants to grow well on metal contaminated soil. The formation of such complexes decrease many free metal ions in plant fluids thus a better threshold to plants hence unaffected growth despite translocation of metals to aerial tissues.…”

Section: Resultsmentioning

confidence: 99%

Lead contamination affects the primary productivity traits, biosynthesis of macromolecules and distribution of metal in durum wheat (Triticumdurum L.)

Malik

Mahmood

Noreen

et al. 2021

Saudi Journal of Biological Sciences

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Highlights The growth, biosynthesis of pigments and other macromolecules appeared to be strong predictors in appraisal of Pb tolerance/susceptibility in durum wheat. Germplasm of CBD59, CBD63 and CBD66 can be exploited for future selection and breeding programs. The bioaccumulation of metal in grains of some cultivars of durum wheat much below than permissible limits set by FAO/WHO is of great significance owing to its implications for food safety.

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“…The uptake of Cd in plants depends on the plant itself, the concentration of Cd in soil, and the soil properties, such as soil pH, organic matter content, and cation exchange capacity ( Eriksson et al, 1996 ; Benavides et al, 2005 ; Kim et al, 2016 ; Zhuang et al, 2021 ). Soil pH is negatively correlated with Cd content in grain ( Kirkham, 2006 ; Baize et al, 2009 ).…”

Section: Discussionmentioning

confidence: 99%

Novel Quantitative Trait Loci for Grain Cadmium Content Identified in Hard White Spring Wheat

et al. 2021

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Cadmium (Cd) is a heavy metal that can cause a variety of adverse effects on human health, including cancer. Wheat comprises approximately 20% of the human diet worldwide; therefore, reducing the concentrations of Cd in wheat grain will have significant impacts on the intake of Cd in food products. The tests for measuring the Cd content in grain are costly, and the content is affected significantly by soil pH. To facilitate breeding for low Cd content, this study sought to identify quantitative trait loci (QTL) and associated molecular markers that can be used in molecular breeding. One spring wheat population of 181 doubled haploid lines (DHLs), which was derived from a cross between two hard white spring wheat cultivars “UI Platinum” (UIP) and “LCS Star” (LCS), was assessed for the Cd content in grain in multiple field trials in Southeast Idaho, United States. Three major QTL regions, namely, QCd.uia2-5B, QCd.uia2-7B, and QCd.uia2-7D, were identified on chromosomes 5B, 7B, and 7D, respectively. All genes in these three QTL regions were identified from the NCBI database. However, three genes related to the uptake and transport of Cd were used in the candidate gene analysis. The sequences of TraesCS5B02G388000 (TaHMA3) in the QCd.uia2-5B region and TraesCS7B02G320900 (TaHMA2) and TraesCS7B02G322900 (TaMSRMK3) in the QCd.uia2-7B region were compared between UIP and LCS. TaHMA2 on 7B is proposed for the first time as a candidate gene for grain Cd content in wheat. A KASP marker associated with this gene was developed and it will be further validated in near-isogenic lines via a gene-editing system in future studies.

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Cadmium accumulation in wheat and maize grains from China: Interaction of soil properties, novel enrichment models and soil thresholds

Cited by 49 publications

References 62 publications

Spatial distribution and risk assessment of fluorine and cadmium in rice, corn, and wheat grains in most karst regions of Guizhou province, China

Spatial distribution and risk assessment of fluorine and cadmium in rice, corn, and wheat grains in most karst regions of Guizhou province, China

Lead contamination affects the primary productivity traits, biosynthesis of macromolecules and distribution of metal in durum wheat (Triticumdurum L.)

Novel Quantitative Trait Loci for Grain Cadmium Content Identified in Hard White Spring Wheat

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