Yttrium and lanthanides (REE) contents were quantified in Rosário's salt marsh (SW Europe) sediments and in the halophyte plant Halimione portulacoides, to evaluate the plant's ability to accumulate these elements as well as the translocation into their aerial organs, and increase the knowledge on the relations between these metals and the salt marsh halophytes plants. Metal sediment contents ranged from 16 to 26 and 16 to 19 mg·kg⁻¹ for Y, and 47–143 and 149–167 mg·kg⁻¹ for ΣREE, in non-colonised and colonised sediment, respectively. These results highlight the role of grain size in the vertical distribution and REE contents in the salt marsh sediments. The deepest layers of the non-colonised sediment showed a marked enrichment of anthropogenic REE, not observed in the colonised sediment. This difference, together with the increased REE content in the roots (2.6–29 and 14–85 mg·kg⁻¹, for Y and ΣREE, respectively) that lead the roots enrichment factors to values above the unit, points to a scavenging and accumulation in belowground organs, depending on the bioavailability rather than the total concentrations. The obtained results also allow to identify preferential layers of REE accumulation in the roots, with greater predominance for Y and MREE. The lower REE contents in aboveground plant parts suggests either low translocation to the upper organs or low retention on these elements in stems and leaves.

在Rosário的盐沼（欧洲西南部）沉积物和盐生植物Halimione portulacoides中量化了钇和镧系元素（REE）的含量，以评估该植物积累这些元素的能力以及向其空中器官的易位性，并增加了对这些元素的认识。这些金属与盐沼盐生植物之间的关系。金属沉积物含量范围为16至26和16至19毫克千克· ^-1为Y，和47-143和149-167毫克公斤· ^-1非殖民化和殖民化沉积物中的ΣREE。这些结果突出了盐分在盐沼沉积物中垂直分布和稀土元素含量中的作用。非殖民化沉积物的最深层显示出明显的人为稀土元素富集，在殖民化沉积物中未观察到。这种差异以及根中REE含量的增加（2.6–29和14–85 mg·kg ^-1（分别针对Y和ΣREE）导致根部富集因子达到单位以上的值，这表明地下器官的清除和积累取决于生物利用度而不是总浓度。获得的结果还允许鉴定根中REE积累的优先层，其中Y和MREE具有更大的优势。地上植物部分较低的稀土元素含量表明其向上部器官的易位性较低或对茎和叶中这些元素的保留率较低。