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Impacts of simulated atmospheric cadmium deposition on the physiological response and cadmium accumulation of Sedum plumbizincicola

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Abstract

Atmospheric cadmium (Cd) deposition contributes to the accumulation of Cd in the soil-plant system. Sedum plumbizincicola is a Cd and Zn hyperaccumulator commonly used for the phytoremediation of Cd-contaminated soil. However, studies on the effects of atmospheric Cd deposition on the accumulation of Cd and physiological response in S. plumbizincicola are still limited. A Cd solution spraying pot experiment was conducted with S. plumbizincicola at three atmospheric Cd deposition concentrations (4, 8, and 12 mg/L). Each Cd concentration levels was divided into two groups, non-mulching (foliar-root uptake) and mulching (foliar uptake). The soil type used in the experiment was reddish clayey soil collected from a farmland. The results showed that compared with the non-mulching control, the fresh weight of S. plumbizincicola in non-mulching with high atmospheric Cd deposition (12 mg/L) increased by 11.35%. Compared with those in the control group, the malondialdehyde (MDA) content in the non-mulching and mulching S. plumbizincicola groups increased by 0.88–11.06 nmol/L and 0.96–1.32 nmol/L, respectively. Compared with those in the non-Cd-treated control group, the shoot Cd content in the mulching group significantly increased by 11.09–180.51 mg/kg. Under high Cd depositions, the Cd in S. plumbizincicola mainly originated from the air and was stored in the shoots (39.7–158.5%). These findings highlight that the physiological response and Cd accumulation of S. plumbizincicola were mainly affected by high Cd deposition and suggest that atmospheric Cd could directly be absorbed by S. plumbizincicola. The effect of atmospheric deposition on S. plumbizincicola cannot be ignored.

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Funding

This research was financially supported by the Young Scientists Fund of the National Natural Science Foundation of China (42107018), and the Hunan Innovative Province Construction Special Fund (2020NK2001).

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Changyin Tan, Shuopei Huang, Xueying Cao, Jia Yang, Qiangwen Xing, and Cheng Tu designed and performed the research. Changyin Tan, Shuopei Huang, Xueying Cao, and Cheng Tu analyzed the data. Shuopei Huang, Changyin Tan, and Cheng Tu wrote the paper. All authors read and approved the final manuscript.

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Correspondence to Changyin Tan.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Huang, ., Tan, C., Cao, X. et al. Impacts of simulated atmospheric cadmium deposition on the physiological response and cadmium accumulation of Sedum plumbizincicola. Environ Sci Pollut Res 31, 16413–16425 (2024). https://doi.org/10.1007/s11356-024-31928-8

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  • DOI: https://doi.org/10.1007/s11356-024-31928-8

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