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Yang JS, Dai Y, Liu Y, Duan S, Li YY, Hu R, Zhou Z, Shi Y, Liu H, Wang S. Reduced cadmium accumulation in tobacco by sodium chloride priming. Environ Sci Pollut Res Int 2020; 27:37410-37418. [PMID: 32399872 DOI: 10.1007/s11356-020-09134-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
Cadmium (Cd) pollution threatens agricultural security worldwide. This study tested the efficacy of priming chemicals to decrease Cd uptake by tobacco plants (Nicotiana tabacum). After initial screening from nine different chemicals (NaCl, Cd(CH3COO)2, Cd(NO3)2, CdCl2, KHNO3, polyethylene glycol 6000 (PEG-6000), indole-3-acetic acid (IAA), ß-aminobutyric acid (BABA), and glutathione (GSH)), NaCl and PEG-6000 were further investigated because of their low risks to plant growth and efficiency to Cd reduction. Priming procedures (concentrations) were optimized for both chemicals and the best one (100 mM NaCl) was used to test both soil and hydroponic media. The results showed 31.3% lower Cd concentrations in shoots after priming with 100 mM NaCl. Phenotype parameters of the plants were also measured and showed no significant impacts of the priming procedures on the shoot biomass and the uptakes of nitrogen (N), phosphorus (P), and potassium (K), nor the photosynthetic capacity (net photosynthesis rate (Pn) and chlorophyll concentration (SPAD)). Histological observations of the roots showed a significant increase of the stele diameter after NaCl priming and a subsequent negative correlation between shoot Cd concentration and stele diameter was found after NaCl priming at different levels. This study confirmed 100 mM NaCl as an efficient priming treatment to decrease Cd uptake and the coarsening of the root stele was identified as a potential explanation for the observed decrease of Cd in tobacco shoots.
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Affiliation(s)
- Jia-Shuo Yang
- Institute of Tobacco Research, Chinese Academy of Agricultural Sciences, 11 Keyuanjingsi Road, Qingdao, 266101, People's Republic of China.
- Central-South Agricultural Experiment Station of China Tobacco, 628 Furong Road, Changsha, 410004, People's Republic of China.
| | - Yanjiao Dai
- Hunan Academy of Agricultural Science, 892 Yuanda Road, Changsha, 410125, People's Republic of China
| | - Yongjun Liu
- Central-South Agricultural Experiment Station of China Tobacco, 628 Furong Road, Changsha, 410004, People's Republic of China
| | - Shuhui Duan
- Central-South Agricultural Experiment Station of China Tobacco, 628 Furong Road, Changsha, 410004, People's Republic of China
| | - Yang-Yang Li
- Central-South Agricultural Experiment Station of China Tobacco, 628 Furong Road, Changsha, 410004, People's Republic of China
| | - Risheng Hu
- Central-South Agricultural Experiment Station of China Tobacco, 628 Furong Road, Changsha, 410004, People's Republic of China
| | - Zhicheng Zhou
- Central-South Agricultural Experiment Station of China Tobacco, 628 Furong Road, Changsha, 410004, People's Republic of China
| | - Yi Shi
- Institute of Tobacco Research, Chinese Academy of Agricultural Sciences, 11 Keyuanjingsi Road, Qingdao, 266101, People's Republic of China
| | - Haiwei Liu
- Institute of Tobacco Research, Chinese Academy of Agricultural Sciences, 11 Keyuanjingsi Road, Qingdao, 266101, People's Republic of China
| | - Shusheng Wang
- Institute of Tobacco Research, Chinese Academy of Agricultural Sciences, 11 Keyuanjingsi Road, Qingdao, 266101, People's Republic of China.
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