The current study represents the first attempt to analyse quantitatively, within a phylogenetic framework, uptake and partitioning patterns of copper (Cu), zinc (Zn), cadmium (Cd) and lead (Pb) in extant saltmarsh taxa globally, and to assess associations of these patterns with various plant traits indicative of their halophytic adaptations. Despite saltmarsh being diverse taxonomically, most saltmarsh taxa accumulate metals to roots at, or above, unity (> 1). Further, there is significant translocation from roots to shoot for Cu, Zn and Cd (≤ 1), however, Pb is less mobile (TF = 0.65). Patterns of accumulation were similar among families, except greater Cd accumulation to roots in members of Juncaceae. Patterns of uptake to roots and translocation to leaves were broadly similar among plant type, plant form, habitat and photosynthetic mode. Zinc is lower in the leaves of salt-secreting species for some closely related taxa, suggesting some species co-excrete sodium (Na⁺) and Zn²⁺ through glands in leaf tissue. Salinity tolerance has no relationship to metal uptake and translocation. Translocation of Zn is greater at lower Zn sediment exposures, reflecting its active uptake and essentiality, but such bias does not affect outcomes of analyses when included as a covariate.

本研究是首次尝试在系统发育框架内定量分析全球现存盐沼类群中铜（Cu），锌（Zn），镉（Cd）和铅（Pb）的吸收和分配模式并评估其关联这些模式具有各种植物性状，表明它们的盐生适应性。尽管Saltmarsh在分类学上是多种多样的，但大多数Saltmarsh的分类单元还是将金属积累到1或更高的根（> 1）上。此外，Cu，Zn和Cd（≤1）从根部到茎部都有明显的易位，但是Pb的移动性较低（TF = 0.65）。各科之间的积累模式相似，不同的是，菊科的根部镉的积累量更大。在植物类型，植物形态，生境和光合作用模式之间，根吸收和叶转运的模式大体相似。⁺）和Zn ²⁺通过叶片组织中的腺体。耐盐性与金属吸收和转运无关。在较低的锌沉积物暴露下，锌的转运更大，反映了其活跃的吸收和必要性，但是当作为协变量包括时，这种偏差不会影响分析的结果。