Abstract
Elevated CO(2) levels and the increase in heavy metals in soils through pollution are serious problems worldwide. Whether elevated CO(2) levels will affect plants grown in heavy-metal-polluted soil and thereby influence food quality and safety is not clear. Using a free-air CO(2) enrichment (FACE) system, we investigated the impacts of elevated atmospheric CO(2) on the concentrations of copper (Cu) or cadmium (Cd) in rice and wheat grown in soil with different concentrations of the metals in the soil. In the two-year study, elevated CO(2) levels led to lower Cu concentrations and higher Cd concentrations in shoots and grain of both rice and wheat grown in the respective contaminated soil. Elevated CO(2) levels slightly but significantly lowered the pH of the soil and led to changes in Cu and Cd fractionation in the soil. Our study indicates that elevated CO(2) alters the distribution of contaminant elements in soil and plants, thereby probably affecting food quality and safety.
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Claims 6
Claim · model-written summary
Elevated CO2 lowered shoot and grain Cu in rice.
- Taxon
- rice
Oryza sativae1 - Treatment
- elevated CO(2) levelse0
- Outcome
- Cu concentrationse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO(2) levels led to lower Cu concentrations and higher Cd concentrations in shoots and grain of both rice and wheat grown in the respective contaminated soil”
e1“copper (Cu) or cadmium (Cd) in rice and wheat”
Claim · model-written summary
Elevated CO2 lowered shoot and grain Cu in wheat.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- elevated CO(2) levelse0
- Outcome
- Cu concentrationse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO(2) levels led to lower Cu concentrations and higher Cd concentrations in shoots and grain of both rice and wheat grown in the respective contaminated soil”
Claim · model-written summary
Elevated CO2 raised shoot and grain Cd in rice.
- Taxon
- riceOryza sativae0
- Treatment
- elevated CO(2) levelse0
- Outcome
- Cd concentrations in shoots and graine0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO(2) levels led to lower Cu concentrations and higher Cd concentrations in shoots and grain of both rice and wheat grown in the respective contaminated soil”
Claim · model-written summary
Elevated CO2 raised shoot and grain Cd in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- elevated CO(2) levelse0
- Outcome
- Cd concentrations in shoots and graine0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO(2) levels led to lower Cu concentrations and higher Cd concentrations in shoots and grain of both rice and wheat grown in the respective contaminated soil”
Claim · model-written summary
Elevated CO2 slightly lowered soil pH.
Not reportedTaxon
Verbatim
e0“Elevated CO(2) levels slightly but significantly lowered the pH of the soil”
Claim · model-written summary
Elevated CO2 changed Cu and Cd soil fractionation.
- Outcome
- Cu and Cd fractionation in the soile0
Not reportedTaxonDirection
Verbatim
e0“led to changes in Cu and Cd fractionation in the soil”
The same questions in other papers
co2 · nutrient: content · Triticum aestivum (wheat)Results differ
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- positive
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See all 63 papers →co2 · nutrient: content · Oryza sativa (rice)Positive and negative results
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- positive
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See all 54 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.