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- Title
Interactive effects of chromate and arsenate on their uptake and speciation in <italic>Pteris ensiformis</italic>.
- Authors
de Oliveira, Letuzia M.; Suchismita, Das; da Silva, Evandro B.; Gao, Peng; Vardanyan, Lilit; Liu, Yungen; Ma, Lena Q.
- Abstract
Background and aims: Arsenate (AsV) and chromate (CrVI) inhibit each other’s uptake and translocation in As-hyperaccumulator <italic>Pteris vittata</italic>. In the present study, we extended the research to As-sensitive plant <italic>Pteris ensiformis</italic> to better understand the mechanism of their interactions.Methods: Plants were exposed to 0, 0.75 or 7.5 mg L−1 AsV and 0, 0.52, or 5.2 mg L−1 CrVI for 7 d in hydroponics. Arsenic and Cr speciation were determined in nutrient solutions and plant biomass.Results: <italic>P. ensiformis</italic> accumulated high levels of As and Cr in the rhizomes and roots with low levels in the fronds. However, <italic>P. ensiformis</italic> was much more effective in taking up Cr than As, as much more Cr was accumulated in the roots (306–6015 vs. 87–642 mg kg−1). AsV and CrVI increased each other’s uptake in the rhizomes and roots when co-present. The AsV and CrVI taken up by <italic>P. ensiformis</italic> were reduced to arsenite (AsIII) and chromite (CrIII), possibly serving as detoxification mechanism.Conclusions: Uptake of As and Cr induced oxidative stress as indicated by increased lipid peroxidation and electrical conductivity. Arsenic and Cr increased each other’s uptake by <italic>P. ensiformis</italic>.
- Subjects
ARSENIC; CHROMIUM; GENETIC speciation; PTERIS; PLANTS; OXIDATIVE stress; PLANT membranes; ELECTROLYTE analysis
- Publication
Plant & Soil, 2018, Vol 422, Issue 1/2, p515
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-017-3480-x