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Cadmium uptake dynamics and translocation in rice seedling: Influence of different forms of selenium.
Ecotoxicol Environ Saf. 2016 Nov; 133:127-34.EE

Abstract

Selenium (Se) can alleviate the toxicity of cadmium (Cd), but little is known about its mechanism in Cd uptake and translocation in plants. We investigated the effects of exogenous selenite, selenate, and selenomethionine (SeMet) on Cd uptake and translocation within rice (Oryza sativa L., Zhunliangyou 608) seedlings, and the concentration-dependent uptake kinetics of Cd into rice roots (with or without Se) were determined. The effect of the endogenous Se pool on Cd uptake was also investigated. Results of uptake kinetics showed that selenite slightly promoted Cd influx during 1h of exposure, compared with no selenite addition; Vmax of Cd uptake increased by 13.8% in 10μM selenite treatment; while the presence of selenate had no effect on the influx of Cd. When exposed to Cd (5μM) over 20h (with selenite) or 30h (with selenate or SeMet), Se addition (5μM) decreased Cd uptake and root-to-shoot translocation; after 30h selenite, selenate, or SeMet addition decreased Cd uptake by roots by 28.6%, 17.7% or 12.1%, respectively. Besides, as the selenite levels in the treatment solutions (1μMCd) increased (0, 0.1, 1, and 5μM, Se), Cd uptake and translocation were both significantly reduced, while the inhibitive effect was more significant at lower levels of selenate. Pretreatment of selenite or selenate (5μM) also decreased Cd uptake by 24.9% or 15.7%, and reduced the root-to-shoot transfer factor by 41.4% or 36.2% after 144h of subjection to Cd (5μM), respectively. The presence of selenite decreased Cd content more effectively than did selenate. Our results demonstrated that Se can effectively reduce the Cd translocation from roots to shoots in rice seedlings.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Wan Y
Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China.
Yu Y
Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China.
Wang Q
Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China.
Qiao Y
Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China.
Li H
Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China. Electronic address: lihuafen@cau.edu.cn.

MeSH

Biological TransportCadmiumOryzaPlant RootsPlant ShootsSeedlingsSeleniumSelenium Compounds

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27434423

Citation

Wan, Yanan, et al. "Cadmium Uptake Dynamics and Translocation in Rice Seedling: Influence of Different Forms of Selenium." Ecotoxicology and Environmental Safety, vol. 133, 2016, pp. 127-34.
Wan Y, Yu Y, Wang Q, et al. Cadmium uptake dynamics and translocation in rice seedling: Influence of different forms of selenium. Ecotoxicol Environ Saf. 2016;133:127-34.
Wan, Y., Yu, Y., Wang, Q., Qiao, Y., & Li, H. (2016). Cadmium uptake dynamics and translocation in rice seedling: Influence of different forms of selenium. Ecotoxicology and Environmental Safety, 133, 127-34. https://doi.org/10.1016/j.ecoenv.2016.07.001
Wan Y, et al. Cadmium Uptake Dynamics and Translocation in Rice Seedling: Influence of Different Forms of Selenium. Ecotoxicol Environ Saf. 2016;133:127-34. PubMed PMID: 27434423.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cadmium uptake dynamics and translocation in rice seedling: Influence of different forms of selenium. AU - Wan,Yanan, AU - Yu,Yao, AU - Wang,Qi, AU - Qiao,Yuhui, AU - Li,Huafen, Y1 - 2016/07/20/ PY - 2016/04/21/received PY - 2016/07/01/revised PY - 2016/07/04/accepted PY - 2016/7/20/entrez PY - 2016/7/20/pubmed PY - 2017/1/25/medline KW - Cadmium KW - Rice KW - Selenate KW - Selenite KW - Translocation KW - Uptake SP - 127 EP - 34 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 133 N2 - Selenium (Se) can alleviate the toxicity of cadmium (Cd), but little is known about its mechanism in Cd uptake and translocation in plants. We investigated the effects of exogenous selenite, selenate, and selenomethionine (SeMet) on Cd uptake and translocation within rice (Oryza sativa L., Zhunliangyou 608) seedlings, and the concentration-dependent uptake kinetics of Cd into rice roots (with or without Se) were determined. The effect of the endogenous Se pool on Cd uptake was also investigated. Results of uptake kinetics showed that selenite slightly promoted Cd influx during 1h of exposure, compared with no selenite addition; Vmax of Cd uptake increased by 13.8% in 10μM selenite treatment; while the presence of selenate had no effect on the influx of Cd. When exposed to Cd (5μM) over 20h (with selenite) or 30h (with selenate or SeMet), Se addition (5μM) decreased Cd uptake and root-to-shoot translocation; after 30h selenite, selenate, or SeMet addition decreased Cd uptake by roots by 28.6%, 17.7% or 12.1%, respectively. Besides, as the selenite levels in the treatment solutions (1μMCd) increased (0, 0.1, 1, and 5μM, Se), Cd uptake and translocation were both significantly reduced, while the inhibitive effect was more significant at lower levels of selenate. Pretreatment of selenite or selenate (5μM) also decreased Cd uptake by 24.9% or 15.7%, and reduced the root-to-shoot transfer factor by 41.4% or 36.2% after 144h of subjection to Cd (5μM), respectively. The presence of selenite decreased Cd content more effectively than did selenate. Our results demonstrated that Se can effectively reduce the Cd translocation from roots to shoots in rice seedlings. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/27434423/Cadmium_uptake_dynamics_and_translocation_in_rice_seedling:_Influence_of_different_forms_of_selenium_ DB - PRIME DP - Unbound Medicine ER -