NGUYEN, Christophe; LOISON, Jean-Philippe; MOTARD, Céline; DAUGUET, Sylvie

doi:10.1007/s11356-023-31631-0

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NGUYEN, Christophe
Interactions Sol Plante Atmosphère [UMR ISPA]

LOISON, Jean-Philippe
Equipe Nutrition, Santé et Biochimie des Lipides [ITERG]

MOTARD, Céline
Terres Inovia

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Environmental Science and Pollution Research. 2023-12-26, vol. 31, n° 1, p. 1674-1680

Springer Verlag

Résumé en anglais

Contamination of sunflower seeds with soil Cd is an important issue for food and feed because this species strongly accumulates this metal. The present work reports that seeds from three sunflower varieties (ES Biba, Extrasol, Vellox) cultivated in the field in a calcareous agricultural soil having a moderately high Cd content (1 mg Cd/kg) had Cd contents of 0.84, 0.88 and 0.76 mg Cd/kg, respectively, all exceeding the regulation limit of 0.5 mg Cd/kg seeds for human food. On average, for the three varieties, washing seeds did not affect their total Cd contents but slightly increased the Cd in the kernels at the expense of that in hulls. Despite the Cd content of the whole seeds not differing between the varieties, the Cd fraction in the edible kernel differed significantly between varieties from 78 to 87% of the total seed Cd. The results of this study suggest that (i) the size of the kernel, relative to that of the hull, may affect the dilution of Cd in kernel tissues and (ii) there might be genetic variability for the capacity of transfer of Cd from the hull to the kernel. This opens the perspective to increase food safety by selecting sunflower genotypes that retain more Cd into the hull and transfer less of it to the edible kernel.< Réduire

Mots clés en anglais

Agricultural soil contamination

ES Biba

Extrasol

Genetic variability

Oil seed

Regulation limit

Vellox

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Cadmium partitioning between hulls and kernels in three sunflower varieties: consequences for food/feed chain safety

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