Experiment 1: Effects of individual REEs, Lanthanum, Neodymium, Gadolinium, on terrestrial crop and native plants: uptake, accumulation and soil pH
In this series of experiments we explored the relationships between Rare Earth Element (REE) toxicity/uptake/accumulation in plants and soil pH. It was hypothesized that plant sensitivity to REEs would increase when exposed to lower soil pH levels, as would be indicated by lower germination and biomass inhibition concentrations in low vs. high pH soils. A similar, but less extensive experiment was previously conducted for Ce that highlighted the need to address soil pH when evaluating REE toxicity (plants were generally more sensitive to Ce when grown in lower pH soils). One REE that was not previously tested, gadolinium (Gd), which is listed as a priority for risk assessment research needs, was included in the experiment. In addition, two of the most widely used and abundant REEs, lanthanum (La) and neodymium (Nd), were also assessed in separate experiments. Three species were tested: two native species, common milkweed, Asclepias syriaca and fowl bluegrass, Poa palustris; as well as one crop species, tomato, Solanum lycopersicum var. Beefsteak. Experiments were conducted in NWRC greenhouses of Environment and Climate Canada with plants tested individually in pots. There was an overall significant effect on percent germination and aboveground biomass of both soil pH level and dose on the three species tested. As expected, lower pH increased phytotoxicity. The measured concentrations of the REEs (Nd, Gd, and La) were almost always higher in roots than in the corresponding shoots.
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Metadata Record Information
- File Identifier
- ecf04244-5db1-433f-a035-ec3f57bee884 XML
- Date Stamp
- 2021-05-12T06:01:12
- Metadata language
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eng; CAN
- Character set
- UTF8
- Hierarchy Level
- Series
http://ec.gc.ca
Data identification
- Title
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Experiment 1: Effects of individual REEs, Lanthanum, Neodymium, Gadolinium, on terrestrial crop and native plants: uptake, accumulation and soil pH
- Date (Creation)
- 2016-04-01
- Date (Publication)
- 2018-05-17
- Status
- Completed
- Metadata language
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eng; CAN
- Character set
- UTF8
- Topic category
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- Environment
- Biota
- Maintenance and Update Frequency
- As needed
- Spatial representation type
- Vector
613 998 0458
Keywords
- Theme
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Rare Earth Elements, metals, phytotoxicity, Lanthanum, Neodymium, Gadolinium
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Government of Canada Core Subject Thesaurus
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Toxicology
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ECCC Information Category EN
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Nature and Biodiversity - Contaminants
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Business Functions
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Assess Toxicity, Manage and Monitor for Environmental Presence of Hazardous Substances and Waste
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Assess Toxicity of Substance
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Geography
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National (CA)
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external.theme.EC_Branch
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Science and Technology Branch
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external.theme.EC_Directorate
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Wildlife and Landscape Science
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external.theme.GC_Security_Level
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Confidential
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- Use Limitation
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Open Government Licence - Canada ( http://open.canada.ca/en/open-government-licence-canada)
- Access Constraints
- License
- Use Constraints
- License
- Begin Date
- 2018-05-17
Extent
))
Ref. system Reference Systems
- Reference system identifier
- EPSG / 4326 / Inconnue
Distribution
Distribution Formats
- Distribution format
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- CSV ( CSV)
http://ec.gc.ca
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