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Pb and Cd uptake in rice roots
Abstract
Pb and Cd are heavy metal pollutants that inhibit plant growth. Using a cultivated rice variety (Dongjin, Oryza sativa L.), we studied how the transport and toxicity of Pb 2+ and Cd 2+ are affected by the presence of K+, Ca 2+ or Mg 2+. K+ had a little effect on uptake or toxicity of Pb 2+ and Cd 2+. Ca 2+ or Mg 2+ blocked both Cd 2+ transport into rice roots and Cd 2+ toxicity on root growth, which suggested that their detoxification effect is directly related to their blocking of entry of the heavy metals. Similarly, Ca 2+ blocked both Pb 2+ transport into the root and Pb 2+ toxicity on root growth. The protective effect of Ca 2+ on Pb 2+ toxicity may be related to its inhibition of the heavy metal accumulation in the root tip, a potential target site of Pb 2+ toxicity. Mg 2+ did not ameliorate the Pb 2+ toxicity on root growth as much as Ca 2+ did, although it decreased Pb 2+ uptake into roots similarly as Ca 2+ did. These results suggest that the protective effect of Ca 2+ on Pb 2+ toxicity may involve multiple mechanisms including competition at the entry level, and that Pb 2+ and Cd 2+ may compete with divalent cations for transport into roots of rice plants.
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Cited by
Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches
Kumar, A., Kumar, A., M.M.S., C.-P., Chaturvedi, A. K., Shabnam, A. A., Subrahmanyam, G., Mondal, R., Gupta, D. K., Malyan, S. K., Kumar, S. S., et al. (2020) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph17072179 · Cited by 1,018
Lead Uptake, Toxicity, and Detoxification in Plants
Pourrut, B., Shahid, M., Dumat, C., Winterton, P., & Pinelli, E. (2011) · Reviews of Environmental Contamination and Toxicology · doi:10.1007/978-1-4419-9860-6_4 · Cited by 937
Rodríguez-Serrano, M., Romero-Puertas, M. C., Pazmiño, D. M., Testillano, P. S., Risueño, M. C., del Río, L. A., & Sandalio, L. M. (2009) · Plant Physiology · doi:10.1104/pp.108.131524 · Cited by 621
Khanam, R., Kumar, A., Nayak, A. K., Shahid, M., Tripathi, R., Vijayakumar, S., Bhaduri, D., Kumar, U., Mohanty, S., Panneerselvam, P., et al. (2020) · Science of The Total Environment · doi:10.1016/j.scitotenv.2019.134330 · Cited by 425
Chang, C. Y., Yu, H. Y., Chen, J. J., Li, F. B., Zhang, H. H., & Liu, C. P. (2014) · Environmental Monitoring and Assessment · doi:10.1007/s10661-013-3472-0 · Cited by 400
Metadata
- Authors
- Kim, Y., Yang, Y., & Lee, Y.
- Venue
- Physiologia Plantarum
- Publisher
- Wiley
- Published
- 2002-10-17
- Volume
- 116
- Issue
- 3
- Pages
- 368-372
- ISSN
- 0031-9317 (ISSN-L)
- 1399-3054
- OpenAlex
- W2149136648
- Cited by
- 208
- References
- 0
- FWCI
- 4.01
- Type
- journal article
- Language
- en
- Open access
- closed
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