- Title
- Global patterns of accumulation and partitioning of metals in halophytic saltmarsh taxa: a phylogenetic comparative approach
- Creator
- Alam, Md Rushna; Islam, Rafiquel; Anh Tran, Thi Kim; Van, Diep Le; Rahman, Mohammad Mahmudur; Griffin, Andrea S.; Yu, Richard Man Kit; MacFarlane, Geoff R.
- Relation
- Journal of Hazardous Materials Vol. 414, Issue 15 July 2021, no. 125515
- Publisher Link
- http://dx.doi.org/10.1016/j.jhazmat.2021.125515
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- 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.
- Subject
- bioconcentration factor; halophyte; translocation factor; trace metals; salinity tolerance
- Identifier
- http://hdl.handle.net/1959.13/1433295
- Identifier
- uon:39208
- Identifier
- ISSN:0304-3894
- Rights
- © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
- Language
- eng
- Full Text
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