Abstract
The effects of elevated CO 2 and ozone (O 3 ) on net photosynthetic rate ( A ) and growth are generally antagonistic although plant responses are highly dependent on crop sensitivity to the individual gases and their concentrations. In this experiment, we evaluated the effects of various CO 2 and O 3 mixtures on leaf gas‐exchange, harvest biomass, and leaf chemistry in peanut ( Arachis hypogaea L.), an O 3 –sensitive species, using open‐top field chambers. Treatments included ambient CO 2 (about 375 μmol mol −1 ) and CO 2 enrichment of approximately 173 and 355 μmol mol −1 in combination with charcoal‐filtered air (22 nmol O 3 mol −1 ), nonfiltered air (46 nmol O 3 mol −1 ), and nonfiltered air plus O 3 (75 nmol O 3 mol −1 ). Twice‐ambient CO 2 in charcoal‐filtered air increased A by 23% while decreasing seasonal stomatal conductance (g s ) by 42%. Harvest biomass was increased 12 to 15% by elevated CO 2 In ambient CO 2 , nonfiltered air and added O 3 lowered A by 21% and 48%, respectively, while added O 3 reduced g s by 18%. Biomass was not significantly affected by nonfiltered air, but was 40% lower in the added O 3 treatment. Elevated CO 2 generally suppressed inhibitory effects of O 3 on A and harvest biomass. Leaf starch concentration was increased by elevated CO 2 and decreased by O 3 Treatment effects on foliar N and total phenolic concentrations were minor. Increasing atmospheric CO 2 concentrations should attenuate detrimental effects of ambient O 3 and promote growth in peanut but its effectiveness declines with increasing O 3 concentrations.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Twice-ambient CO2 increased net photosynthetic rate of peanut by 23%.
- Taxon
- peanut
Arachis hypogaeae3 - Treatment
- elevated CO 2e0
- Outcome
- net photosynthetic rate ( A )e0
- Direction
- increasede1
- Value
- 23%e1
- Comparator
- ambient CO 2e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of elevated CO 2 and ozone (O 3 ) on net photosynthetic rate ( A ) and growth are generally antagonistic”
e1“increased A by 23% while decreasing seasonal stomatal conductance (g s ) by 42%”
e2“Treatments included ambient CO 2 (about 375 μmol mol −1)”
e3“peanut ( Arachis hypogaea L.)”
Claim · model-written summary
Twice-ambient CO2 decreased seasonal stomatal conductance of peanut by 42%.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- elevated CO 2e0
- Outcome
- seasonal stomatal conductancee1
- Direction
- decreasinge1
- Value
- 42%e1
- Comparator
- ambient CO 2e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of elevated CO 2 and ozone (O 3 ) on net photosynthetic rate ( A ) and growth are generally antagonistic”
e1“increased A by 23% while decreasing seasonal stomatal conductance (g s ) by 42%”
e2“Treatments included ambient CO 2 (about 375 μmol mol −1)”
e3“peanut ( Arachis hypogaea L.)”
Claim · model-written summary
Harvest biomass of peanut increased 12 to 15% under elevated CO2.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- elevated CO 2e4
- Outcome
- Harvest biomasse4
- Direction
- increasede4
- Value
- 12 to 15%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e4“Harvest biomass was increased 12 to 15% by elevated CO 2”
Claim · model-written summary
Nonfiltered air in ambient CO2 lowered net photosynthetic rate of peanut by 21%.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- nonfiltered aire5
- Outcome
- net photosynthetic rate ( A )e0
- Direction
- lowerede5
- Value
- 21%e5
- Qualifier
- In ambient CO 2e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of elevated CO 2 and ozone (O 3 ) on net photosynthetic rate ( A ) and growth are generally antagonistic”
e3“peanut ( Arachis hypogaea L.)”
e5“In ambient CO 2 , nonfiltered air and added O 3 lowered A by 21% and 48%, respectively, while added O 3 reduced g s by 18%”
Claim · model-written summary
Added O3 lowered net photosynthetic rate of peanut by 48% in ambient CO2.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- added O 3e5
- Outcome
- net photosynthetic rate ( A )e0
- Direction
- lowerede5
- Value
- 48%e5
- Qualifier
- In ambient CO 2e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of elevated CO 2 and ozone (O 3 ) on net photosynthetic rate ( A ) and growth are generally antagonistic”
e3“peanut ( Arachis hypogaea L.)”
e5“In ambient CO 2 , nonfiltered air and added O 3 lowered A by 21% and 48%, respectively, while added O 3 reduced g s by 18%”
Claim · model-written summary
Added O3 reduced stomatal conductance of peanut by 18% in ambient CO2.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e5“In ambient CO 2 , nonfiltered air and added O 3 lowered A by 21% and 48%, respectively, while added O 3 reduced g s by 18%”
Claim · model-written summary
Biomass of peanut was not significantly affected by nonfiltered air.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- nonfiltered aire6
- Outcome
- Biomasse6
- Direction
- no_changeinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e6“Biomass was not significantly affected by nonfiltered air, but was 40% lower in the added O 3 treatment”
Claim · model-written summary
Biomass of peanut was 40% lower in the added O3 treatment.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- added O 3 treatmente6
- Outcome
- Biomasse6
- Direction
- lowere6
- Value
- 40%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e6“Biomass was not significantly affected by nonfiltered air, but was 40% lower in the added O 3 treatment”
Claim · model-written summary
Elevated CO2 generally suppressed the inhibitory effects of O3 on net photosynthetic rate and harvest biomass of peanut.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- Elevated CO 2e0
- Outcome
- inhibitory effects of O 3 on A and harvest biomasse0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e0“Elevated CO 2 generally suppressed inhibitory effects of O 3 on A and harvest biomass”
Claim · model-written summary
Elevated CO2 increased leaf starch concentration of peanut.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- elevated CO 2e0
- Outcome
- Leaf starch concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e0“Leaf starch concentration was increased by elevated CO 2 and decreased by O 3”
Claim · model-written summary
O3 decreased leaf starch concentration of peanut.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- O 3e0
- Outcome
- Leaf starch concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e0“Leaf starch concentration was increased by elevated CO 2 and decreased by O 3”
Claim · model-written summary
Treatment effects on foliar N and total phenolic concentrations of peanut were minor.
- Taxon
- peanutArachis hypogaeae3
- Treatment
- Treatmente0
- Outcome
- foliar N and total phenolic concentrationse0
- Direction
- no_changeinferrede0
- Qualifier
- minore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“peanut ( Arachis hypogaea L.)”
e0“Treatment effects on foliar N and total phenolic concentrations were minor”
Claim · model-written summary
Increasing atmospheric CO2 is expected to attenuate detrimental effects of ambient O3 on peanut growth, but the effectiveness declines as O3 increases.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- Increasing atmospheric CO2 concentrationse0
- Outcome
- growthe0
- Direction
- promotee0
- Qualifier
- its effectiveness declines with increasing O3 concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing atmospheric CO2 concentrations should attenuate detrimental effects of ambient O3 and promote growth in peanut but its effectiveness declines with increasing O3 concentrations”
The same questions in other papers
co2 · physiology: photosynthesis · Arachis hypogaea (peanut)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
See all 7 papers →ozone · physiology: photosynthesis · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- negative
ozone · growth · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- negative
ozone · quality: sugar starch · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- negative
co2 · yield · Arachis hypogaea (peanut)Results agree
13 papers in the same direction as this paper
- positive
- positive
- positive
10 papers more in this group
See all 14 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.