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Metabolomic analysis reveals dose-dependent alteration of maize (Zea mays L.) metabolites and mineral nutrient profiles upon exposure to zerovalent iron nanoparticles
- Source :
- NanoImpact. 23
- Publication Year :
- 2021
-
Abstract
- Nanoscale zero-valent iron (nZVI) has been widely applied in the environmental field to degrade organic pollutants. The potential risk posed from nZVI on crop species is not well understood and is critical for sustainable application in the future. In this study, maize (Zea mays L.) plants were cultivated in field soils mixed with nZVI at 0, 50, and 500 mg/kg soil for four weeks. Upon exposure to 500 mg/kg nZVI, ICP-MS results showed that Fe accumulated by roots and translocated to leaves was increased by 36% relative to untreated controls. At 50 mg/kg, root elongation was enhanced by 150–200%; at 500 mg/kg, pigments, lipid peroxidation, and polyphenolic levels in leaves were increased by 12, 87 and 23%, respectively, whereas the accumulation of Al, Ca, and P were decreased by 62.2%, 19.7%, and 13.3%, respectively. A gas chromatography–mass spectrometry (GC–MS) based metabolomics analysis of maize roots revealed that antioxidants and stress signaling-associated metabolites were downregulated at 50 mg/kg, but were upregulated at 500 mg/kg. At 50 mg/kg, the content of glutamate was increased by 11-fold, whereas glutamine was decreased by 99% with respect to controls. Interestingly, eight metabolic pathways were disturbed at 50 mg/kg, but none at 500 mg/kg. This metabolic reprogramming at the lower dose represented potential risks to the health of exposed plants, which could be particularly important although no phenotypic impacts were noted. Overall, metabolites analysis provides a deeper understanding at the molecular level of plant response to nZVI and is a powerful tool for full characterization of risk posed to crop species as part of food safety assessment.
- Subjects :
- Materials Science (miscellaneous)
Iron
Metal Nanoparticles
02 engineering and technology
010501 environmental sciences
01 natural sciences
Zea mays
Lipid peroxidation
chemistry.chemical_compound
Pigment
Soil
Metabolomics
Animal science
Safety, Risk, Reliability and Quality
0105 earth and related environmental sciences
Zerovalent iron
Minerals
Public Health, Environmental and Occupational Health
Nutrients
021001 nanoscience & nanotechnology
Glutamine
Metabolic pathway
chemistry
Polyphenol
visual_art
Soil water
visual_art.visual_art_medium
0210 nano-technology
Safety Research
Subjects
Details
- ISSN :
- 24520748
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- NanoImpact
- Accession number :
- edsair.doi.dedup.....4cb4624443d1a1be718b5ac4053266c7