Abstract
Low efficiency is a key problem confronting the development and application of phytoremediation technology. Based on political pressure to reduce CO2 emissions in China and the fact that CO2 is necessary for plant photosynthesis, the effects of captured CO2 fertilization on phytoremediation of soil di-(2-ethylhexyl) phthalate (DEHP) pollution by C3 plant (mung bean, Vigna radiata L.) and C4 plant (maize, Zea mays L.) were investigated. Results showed that DEHP pollution negatively affected the growth and rhizosphere environments of both plants. After CO2 fertilization, both plants had more biomass (aboveground, belowground, and total dry weight), higher alkaline phosphatase activity, and more microbes with DEHP tolerance in their rhizospheres. Superoxide dismutase activity in leaves of both plants decreased significantly. Microbial community composition in both rhizospheres changed. CO2 fertilization also increased plant uptake of DEHP, particularly in the roots, and decreased residual DEHP concentrations in the rhizospheres. These effects were more evident in the C3 than in the C4 plant. This study indicated that CO2 fertilization can enhance the phytoremediation process of polluted soil through promoting plant growth, improving the rhizosphere environment, and increasing plant uptake of DEHP, particular in a C3 plant. CO2 fertilization could be considered as a measure to enhance phytoremediation.
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Claims 10
Claim · model-written summary
DEHP pollution harmed growth and rhizosphere conditions of mung bean and maize.
- Taxon
- mung bean
.jpg?width=60)
Vigna radiatat0 - Treatment
- DEHP pollutione0
- Outcome
- growth and rhizosphere environmentse0
- Direction
- negatively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“DEHP pollution negatively affected the growth and rhizosphere environments of both plants”
t0“mung bean, Vigna radiata L.”
Claim · model-written summary
CO2 fertilization increased biomass of both plants.
- Taxon
- mung beanVigna radiatat0
- Treatment
- CO2 fertilizatione0
- Outcome
- biomass (aboveground, belowground, and total dry weight)e0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After CO2 fertilization, both plants had more biomass (aboveground, belowground, and total dry weight)”
t0“mung bean, Vigna radiata L.”
Claim · model-written summary
CO2 fertilization increased rhizosphere alkaline phosphatase activity.
- Taxon
- mung beanVigna radiatat0
- Treatment
- CO2 fertilizationt1
- Outcome
- alkaline phosphatase activitye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher alkaline phosphatase activity”
t0“mung bean, Vigna radiata L.”
t1“CO2 fertilization also increased plant uptake of DEHP”
Claim · model-written summary
CO2 fertilization increased DEHP-tolerant rhizosphere microbes.
- Taxon
- mung beanVigna radiatat0
- Treatment
- CO2 fertilizationt1
- Outcome
- microbes with DEHP tolerance in their rhizospherese0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more microbes with DEHP tolerance in their rhizospheres”
t0“mung bean, Vigna radiata L.”
t1“CO2 fertilization also increased plant uptake of DEHP”
Claim · model-written summary
CO2 fertilization reduced leaf superoxide dismutase activity significantly.
- Taxon
- mung beanVigna radiatat0
- Organ / stage
- leavese0
- Treatment
- CO2 fertilizationt1
- Outcome
- Superoxide dismutase activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Superoxide dismutase activity in leaves of both plants decreased significantly”
t0“mung bean, Vigna radiata L.”
t1“CO2 fertilization also increased plant uptake of DEHP”
Claim · model-written summary
CO2 fertilization changed rhizosphere microbial community composition.
- Taxon
- mung beanVigna radiatat0
- Treatment
- CO2 fertilizationt1
- Outcome
- Microbial community composition in both rhizospherese0
- Direction
- changede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial community composition in both rhizospheres changed”
t0“mung bean, Vigna radiata L.”
t1“CO2 fertilization also increased plant uptake of DEHP”
Claim · model-written summary
CO2 fertilization increased plant DEHP uptake, particularly in roots.
- Taxon
- mung beanVigna radiatat0
- Organ / stage
- rootse0
- Treatment
- CO2 fertilizatione0
- Outcome
- plant uptake of DEHPe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO2 fertilization also increased plant uptake of DEHP, particularly in the roots”
t0“mung bean, Vigna radiata L.”
Claim · model-written summary
CO2 fertilization decreased residual rhizosphere DEHP.
- Taxon
- mung beanVigna radiatat0
- Treatment
- CO2 fertilizationt1
- Outcome
- residual DEHP concentrations in the rhizospherese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased residual DEHP concentrations in the rhizospheres”
t0“mung bean, Vigna radiata L.”
t1“CO2 fertilization also increased plant uptake of DEHP”
Claim · model-written summary
CO2 fertilization effects were more evident in the C3 plant than the C4 plant.
- Taxon
- mung beanVigna radiatat0
- Outcome
- These effectse0
- Direction
- more evidente0
- Comparator
- C4 plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These effects were more evident in the C3 than in the C4 plant”
t0“mung bean, Vigna radiata L.”
Claim · model-written summary
The authors recommend CO2 fertilization to enhance phytoremediation.
- Taxon
- mung beanVigna radiatat0
- Outcome
- measure to enhance phytoremediatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO2 fertilization could be considered as a measure to enhance phytoremediation”
t0“mung bean, Vigna radiata L.”
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See all 6 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.