Absorption and interaction mechanisms of uranium & cadmium in purple sweet potato(Ipomoea batatas L.).

Jin-Long Lai, Deng Zhang-Xuan, J I Xiao-Hui, Luo Xue-Gang

Journal: Journal of hazardous materials 2021;400():123264

PMID: 32947695

Full Text on Elsevier Science View on PubMed

Abstract

The purpose of this study was to reveal the absorption and interaction mechanisms of uranium (U) & cadmium (Cd) in corps. Purple sweet potato (Ipomoea batatas L.) was selected as the experimental material. The absorption behavior of U and Cd in this crop and the effects on mineral nutrition were analyzed in a pot experiment. The interactions between U and Cd in purple sweet potato were analyzed using UPLC-MS metabolome analysis. The pot experiment confirmed that the root tuber of the purple sweet potato had accumulated U (1.68-5.16 mg kg) and Cd (0.78-2.02 mg kg) and would pose a health risk if consumed. Both U and Cd significantly interfered with the mineral nutrient of the roots. Metabolomics revealed that a total of 4865 metabolites were identified in roots. 643 (419 up; 224 down), 526 (332 up; 194 down) and 634 (428 up; 214 down) different metabolites (DEMs) were identified in the U, Cd, and U + Cd exposure groups. Metabolic pathway analysis showed that U and Cd induced the expression of plant hormones (the first messengers) and cyclic nucleotides (cAMP and cGMP, second messengers) in cells and regulated the primary/secondary metabolism of roots to induce resistance to U and Cd toxicity.

Address: College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China; School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China.; School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.; College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China; College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, China.; School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China. Electronic address: [email protected].

DOI: 10.1016/j.jhazmat.2020.123264

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MeSH Terms: Cadmium, Chromatography, Liquid, Ipomoea batatas, Tandem Mass Spectrometry, Uranium