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Insights into mechanism on organic acids assisted translocation of uranium in Brassica juncea var. foliosa by EXAFS.
Wu, Rulei; Fan, Yu; Wu, Yixuan; Zhou, Sai; Tang, Siqun; Feng, Xiaojie; Tan, Xiaoli; Wang, Jianmei; Liu, Li; Jin, Yongdong; Xia, Chuanqin.
Afiliação
  • Wu R; College of Chemistry, Sichuan University, Chengdu, 610064, China.
  • Fan Y; College of Chemistry, Sichuan University, Chengdu, 610064, China.
  • Wu Y; College of Chemistry, Sichuan University, Chengdu, 610064, China.
  • Zhou S; College of Chemistry, Sichuan University, Chengdu, 610064, China.
  • Tang S; College of Chemistry, Sichuan University, Chengdu, 610064, China.
  • Feng X; Logistic Engineering University, Chongqing, 401311, China.
  • Tan X; College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
  • Wang J; Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China.
  • Liu L; College of Chemistry, Sichuan University, Chengdu, 610064, China.
  • Jin Y; College of Chemistry, Sichuan University, Chengdu, 610064, China. Electronic address: jinyongdong@scu.edu.cn.
  • Xia C; College of Chemistry, Sichuan University, Chengdu, 610064, China. Electronic address: xiachqin@163.com.
J Environ Radioact ; 218: 106254, 2020 Jul.
Article em En | MEDLINE | ID: mdl-32421586
Citric acid (CA) and Lactic acid (LA) were used as additives to study the mechanism of organic acid promoting the root-to-shoot translocation of uranium (U) in Brassica juncea var. foliosa from molecular and tissue levels. Firstly, the distribution of U in plants under the condition of different organic acids concentrations were studied. The accumulation of U in leafs of 1 mM CA group and 5 mM LA group reached 2225 and 1848 mg/kg respectively, which was about 5 times that of the control group. Secondly, the speciation and distribution of U in plant roots after exposure to different culture solutions were studied by EXAFS and SEM. The result of EXAFS found that the complex of U with organic acids resulted in the U accumulated in the roots was the uranyl carboxylate speciation, while the control group only was the uranyl phosphate speciation. SEM results showed that the lactic acids could enhanced the translocation of U from the cortex to the stele. Thirdly, we further studied the apoplastic pathway and the symplastic pathway of U translocation using transpiration inhibitor and metabolism inhibitor. Compared with the control group, it was likely that the complex of U with organic acids were translocated into the shoot of plants through the apoplastic pathway.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Monitoramento de Radiação / Urânio / Mostardeira Idioma: En Revista: J Environ Radioact Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Monitoramento de Radiação / Urânio / Mostardeira Idioma: En Revista: J Environ Radioact Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China