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2018 ChengMM PLSO 430,219.pdf (633.28 kB)

Cadmium reduces zinc uptake but enhances its translocation in the cadmium-accumulator, Carpobrotus rossii, without affecting speciation

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posted on 06.01.2021, 01:09 by Miaomiao Cheng, Peter M Kopittke, Anan Wang, Peter Sale, Caixian Tang
© 2018, Springer International Publishing AG, part of Springer Nature. Background and aims: Interactions between Cd and Zn occur in soils and plants but are inconsistent. This study examined how Cd/Zn interactions influence the growth of Carpobrotus rossii (Haw.) and the accumulation of Cd and Zn in plants. Methods: Plants were grown in nutrient solutions containing 5–100 μM Zn and 0, 5 or 15 μM Cd. Plant growth and tissue concentrations were measured, and the speciation of Zn within the plant tissues determined using synchrotron-based X-ray absorption spectroscopy. Results: There was an additive negative interaction between Cd and Zn on root growth. Only the highest level of Zn (100 μM) decreased Cd concentrations in root and shoot tissues (by 40–64%), whilst 100 μM Zn enhanced Cd translocation at 5 μM Cd but decreased it at 15 μM Cd. In contrast, both 5 and 15 μM Cd decreased Zn concentrations in root and shoot tissues but increased Zn translocation by 30–90%. This interaction was not associated with changes in Zn speciation within the plants, with most Zn associated with oxalate (48–87%). Conclusions: The presence of Zn and Cd resulted in an additive negative effect on root growth, but an antagonistic pattern in their accumulation in shoots of C. rossii.

History

Publication Date

01/01/2018

Journal

Plant and Soil

Volume

430

Issue

1 - 2

Pagination

13p. (p. 219-231)

Publisher

Springer

ISSN

0032-079X

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