Fate of Exogenous Selenium in the Soil–Plant System: Se Accumulation, Translocation, and Effects on Growth in Vegetable, Legume, and Cereal Species

作者：Jun Li, Junxiang Huang, Ana Maria Murillo Abril, Lila Otero-González, Shulin He, Ivet Ferrer, Piet N.L. Lens, Gijs Du Laing · 发表于：Journal of Agricultural and Food Chemistry · 年份：2025 · DOI：10.1021/acs.jafc.5c01878 · 被引用次数：9 · 研究领域：Selenium in Biological Systems、Heavy Metals in Plants、Heavy Metal Exposure and Toxicity

Selenium (Se) is an essential micronutrient that is often deficient in human and animal diets. As primary dietary components, cereals, legumes, and vegetables present viable targets for Se biofortification. However, systematic comparisons of Se behavior in the soil environment and across diverse crops remain limited. To address this, soil incubation and pot experiments were conducted to investigate the fate of Se in soil and various crops, including Brassicaceae (pakchoi), Asteraceae (lettuce), Poaceae (wheat and maize), and Fabaceae (common beans). The evolution of bioavailable Se content in soil pore water and its uptake by the plants were monitored. Selenium accumulation, translocation patterns, and crop responses based on growth parameters were also comprehensively compared among crops through Mantel test, principal component analysis (PCA), and partial least-squares path modeling (PLS–PM). The results demonstrated that the dynamics of Se contents in soil pore water followed a pseudo-second-order reaction model ( R 2 > 0.95). Pakchoi exhibited the highest Se concentration in the crops, reaching up to 732 ± 137 mg/kg in shoots, which are 2.0 to 4.5 times greater than that of wheat, the crop with the lowest Se concentration. In pakchoi and beans, the Se taken up by the crop was primarily translocated to the aboveground parts, with the translocation factor (TF) ranging from 1.5 to 4.6, whereas it was mainly retained in the roots of other crops. High Se application (≥3 mg/kg)...