Journal article
Exogenous selenium (cadmium) inhibits the absorption and transportation of cadmium (selenium) in rice
Environmental Pollution, Vol.268(Part A), pp.1-9
01/01/2021
PMID: 33160738
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Abstract
Antagonism between selenium (Se) and cadmium (Cd) has been demonstrated in plants. However, a mutual suppression threshold for Se and Cd has not been identified in previous studies using Cd or Se individually. To fill this knowledge gap, we determined the levels of Se and Cd in various tissues of rice under concentration gradients of Se and Cd with different Se application times via hydroponic experiments. The results showed that the application of exogenous Se or Cd reduced the uptake and transport of the other. When the molar ratio of Se/Cd (R (Se/Cd)) was higher than 1, the concentration and transfer factor of Cd (TF-Cd) in all parts of rice simultaneously reached the lowest values. The minimum Se absorption in rice was obtained at R (Cd/Se) greater than 20, while no inhibition threshold was found for Se transport. In addition, approximately 1:1 R (Se/Cd) was observed in roots and the addition of exogenous Cd or Se promoted the enrichment of the other element in roots. These data suggested a mutual inhibition of Se and Cd in their absorption, transportation and accumulation in rice, which might be related to the formation of insoluble Cd–Se complexes in roots. This study provided new insights into a plausible explanation of the interactions between Se and Cd and contributed to the remediation and treatment of combined Se and Cd pollution in farmland systems.
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•Se and Cd exhibit a mutual suppression threshold for uptake and transport in rice.•Exogenous Cd or Se promotes the enrichment of the other in roots.•Uptake and transport of Se and Cd may be affected by CdSe in roots.•Sheath acts an essential role in hindering Cd transport not Se to the leaves.
Details
- Title
- Exogenous selenium (cadmium) inhibits the absorption and transportation of cadmium (selenium) in rice
- Creators
- Yongkun Guo - Chinese Academy of SciencesKang Mao - Chinese Academy of SciencesHaorui Cao - Chinese Academy of SciencesWaqar Ali - Chinese Academy of SciencesDa Lei - Chinese Academy of SciencesDongye Teng - Chinese Academy of SciencesChuanyu Chang - Chinese Academy of SciencesXuefeng Yang - Chinese Academy of SciencesQi Yang - Chinese Academy of SciencesNabeel Khan Niazi - University of Agriculture FaisalabadXinbin Feng - Chinese Academy of SciencesHua Zhang - Chinese Academy of Sciences
- Publication Details
- Environmental Pollution, Vol.268(Part A), pp.1-9
- Publisher
- Elsevier Ltd
- Grant note
- This work is supported by the National Science Foundation of China-Project of Karst Science Research Center (U1612442), Financial support was provided by the National Key Research and Development Program of China (No. 2019 YFC1803600), Science and Technology Program of Guizhou Province of China [Grant No. (2019)5618, 2019(2963), and (2019)4428], and Opening Fund of the State Key Laboratory of Environmental Geochemistry of China (SKLEG2019606, 2019717).
- Identifiers
- 991012951193802368
- Copyright
- © 2020 Elsevier Ltd. All rights reserved.
- Academic Unit
- School of Environment, Science and Engineering; Science; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article