Synergistic Effects of Exogenous Nutrient Ions on the Real-Time Cadmium Extraction by an Accumulator

Siqi Wang (), Huiping Dai (), Dandan Ji, Shuang Cui, Chengzhi Jiang, Lidia Skuza, Lianzhen Li, Shuhe Wei and Lijun Zhang
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Siqi Wang: Key Laboratory of Wastewater Treatment Technology of Liaoning Province, Academy of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
Huiping Dai: College of Biological Science & Engineering, Shaanxi Province Key Laboratory of Bio-Resources, Qinling-Bashan Mountains Bioresources Comprehensive Development C.I.C, State Key Laboratory of Biological Resources and Ecological Environment Jointly Built by Qinba Province and Ministry, Shaanxi University of Technology, Hanzhong 723001, China
Dandan Ji: Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
Shuang Cui: Key Laboratory of Wastewater Treatment Technology of Liaoning Province, Academy of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
Chengzhi Jiang: Key Laboratory of Wastewater Treatment Technology of Liaoning Province, Academy of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
Lidia Skuza: Institute of Biology, Centre for Molecular Biology and Biotechnology, University of Szczecin, 71-415 Szczecin, Poland
Lianzhen Li: College of Environmental Sciences and Engineering, Qingdao University, Qingdao 266071, China
Shuhe Wei: Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
Lijun Zhang: Shenbei New District Rural Area Revitalization and Development Center, Shenyang 110121, China

Agriculture, 2024, vol. 14, issue 5, 1-10

Abstract: Bidens tripartita L. is a cadmium (Cd) accumulator. However, the real-time influx or efflux of Cd 2+ around its root apex has not yet been performed. The object of this experiment was to compare the roles of added ions in solution on dynamic Cd extraction by B . tripartita root tip. Quartz sand was used to grow the seedling of B. tripartite . The Cd concentrations of all samples were determined by using ICP-OES after digestion. The Cd 2+ influx around the root apex was measured in vivo, i.e., using non-invasive micro-test technology (NMT). The results showed that the Cd 2+ influx was found to be decreased by 35.9%, 43.7%, 20.6%, and 57.5% under 10 μM Cd combined with high content Ca 2+ , Mg 2+ , Fe 3+ , or K + (16 mM, 8 mM, 0.5 mM, 18 mM, respectively), compared to that under 10 μM Cd stress. But Cd treatments with low content ions with 0.05 mM Fe 3+ or 0.5 mM S increased the Cd 2+ influx in roots by 20.5% and 34.6%, respectively. It was also found that Cd treatment with high concentrations of Ca 2+ or K + increased the shoot biomass of B. tripartita seedlings. Chl a and b contents were significantly decreased in the Cd treatments with low concentrations of Fe 3+ or S compared to those under Cd stress alone, and the dehydrogenase activity of the roots decreased in the treatment of Cd with 0.05 mM Fe 3+ or 0.5 mM S. Our results indicate that the addition of 0.05 mM Fe 3+ or 0.5 mM S promoted Cd 2+ influx and Cd uptake by B. tripartita. Unlike traditional measurement, the Cd 2+ movements of three-dimensional space around the B. tripartita root tip had been performed by NMT. It was suggested that the effects of S and Fe 3+ on the remediation potential of B. tripartita need to be further researched in the future. The results of this study provided a real-time and micro-dynamic theoretical basis for phytoremediation mechanisms.

Keywords: Cd 2+; NMT; biomass; chlorophyll; dehydrogenase (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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