Abstract
The purpose of the study was to investigate the effects of salinity and pH variations on cadmium uptake by Bidens tripartita L. roots using non-invasive micro-test technology (NMT). The results indicated that Cd2+ influx at 300 µm from the root apexes decreased in treatments with Cd and 5 mM or 10 mM NaCl compared to Cd stress alone. However, treatments with Cd and 2.5 mM NaCl had little effect on net Cd2+ influx compared to Cd treatments alone. Importantly, Cd treatments at pH = 4.0 markedly increased Cd2+ influx to the roots. While it was significantly decreased when pH was adjusted to 7.0 compared to those at pH = 5.5. The results also showed that treatments with Cd in combination with 5 mM or 10 mM NaCl significantly decreased chlorophyll (Chl) a and b concentrations in leaves and root vigor of B. tripartita relative to Cd treatments alone, while there were no significant differences between Cd treatments with 2.5 mM NaCl and Cd treatments alone. A significant increase in root vigor was observed in Cd treatments at pH = 4.0 in comparison to pH = 5.5.
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Data Availability
The datasets analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work was supported by the Scientific research project of City-University co-construction of Shaanxi Province, China (SXJ-2101; SXZJ-2301). Open Fund of Cultivation State Key Laboratory of Qinba Biological Resources and Ecological Environment of Shaanxi University of Technology, China (SLGPT2019KF04-02), Qinba Bioremediation and Resource Development Research and Innovation Base (2022-ZC-GXYZ-0029), Innovation Capability Support Program of Shaanxi (2022WGZJ-20), the project of Foreign Experts Bureau of Shaanxi province of China, China (2023WGZJ-YB-05, G2022040018L, G2021041011L, G20200241015). The General Program from the Education Department of Liaoning Province (LJKMZ20220595). The Scientific Research Funds for the Innovation Team Construction Plan of Shenyang Ligong University (SYLUTD202103). The Shenyang Scientific Plan Project (21-109-3-06).
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Wang, S., Dai, H., Ji, D. et al. Characteristics of Cd Uptake by the Roots of Bidens tripartita L. Under Salinity and pH Variations Assessed by Applying Non-invasive Micro-test Technology. Water Air Soil Pollut 234, 335 (2023). https://doi.org/10.1007/s11270-023-06286-9
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DOI: https://doi.org/10.1007/s11270-023-06286-9