Abstract
The effects of elevated CO2 and O3, singly and in combination were investigated on various physiological, biochemical and yield parameters of two locally grown wheat (Triticum aestivum L.) cultivars (HUW-37 and K-9107) in open top chambers (OTCs). Elevated CO2 stimulated photosynthetic rate (Ps) and Fv/Fm ratio and reduced the stomatal conductance (gs). Reactive oxygen species, lipid peroxidation, anti-oxidative enzymes, ascorbic acid and total phenolics were higher, whereas Ps, gs, Fv/Fm, protein and photosynthetic pigments were reduced in elevated O3 exposure, as compared to their controls. Under elevated CO2 + O3, elevated levels of CO2 modified the plant performance against O3 in both the cultivars. Elevated CO2 caused significant increase in economic yield. Exposure to elevated O3 caused significant reduction in yield and the effect was cultivar-specific. The study concluded that elevated CO2 ameliorated the negative impact of elevated O3 and cultivar HUW-37 was more sensitive to elevated O3 than K-9107.
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Claims 10
Claim · model-written summary
Elevated CO2 stimulated wheat photosynthetic rate and Fv/Fm.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Elevated CO2e0
- Outcome
- photosynthetic rate (Ps) and Fv/Fm ratioe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated CO2 stimulated photosynthetic rate (Ps) and Fv/Fm ratio”
t0“wheat”
Claim · model-written summary
Elevated CO2 reduced wheat stomatal conductance.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Elevated CO2e0
- Outcome
- stomatal conductance (gs)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated CO2 stimulated photosynthetic rate (Ps) and Fv/Fm ratio and reduced the stomatal conductance (gs)”
t0“wheat”
Claim · model-written summary
Elevated O3 increased reactive oxygen species and lipid peroxidation.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- elevated O3 exposuree0
- Outcome
- Reactive oxygen species, lipid peroxidatione0
- Direction
- highere0
- Comparator
- their controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reactive oxygen species, lipid peroxidation, anti-oxidative enzymes, ascorbic acid and total phenolics were higher, whereas Ps, gs, Fv/Fm, protein and photosynthetic pigments were reduced in elevated O3 exposure, as compared to their controls.”
t0“wheat”
Claim · model-written summary
Elevated O3 increased anti-oxidative enzymes, ascorbic acid and total phenolics.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- elevated O3 exposuree0
- Outcome
- anti-oxidative enzymes, ascorbic acid and total phenolicse0
- Direction
- highere0
- Comparator
- their controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reactive oxygen species, lipid peroxidation, anti-oxidative enzymes, ascorbic acid and total phenolics were higher, whereas Ps, gs, Fv/Fm, protein and photosynthetic pigments were reduced in elevated O3 exposure, as compared to their controls.”
t0“wheat”
Claim · model-written summary
Elevated O3 reduced Ps, gs and Fv/Fm.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- elevated O3 exposuree0
- Outcome
- Ps, gs, Fv/Fme0
- Direction
- reducede0
- Comparator
- their controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reactive oxygen species, lipid peroxidation, anti-oxidative enzymes, ascorbic acid and total phenolics were higher, whereas Ps, gs, Fv/Fm, protein and photosynthetic pigments were reduced in elevated O3 exposure, as compared to their controls.”
t0“wheat”
Claim · model-written summary
Elevated O3 reduced protein and photosynthetic pigments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- elevated O3 exposuree0
- Outcome
- protein and photosynthetic pigmentse0
- Direction
- reducede0
- Comparator
- their controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reactive oxygen species, lipid peroxidation, anti-oxidative enzymes, ascorbic acid and total phenolics were higher, whereas Ps, gs, Fv/Fm, protein and photosynthetic pigments were reduced in elevated O3 exposure, as compared to their controls.”
t0“wheat”
Claim · model-written summary
Elevated CO2 significantly increased wheat economic yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Elevated CO2e0
- Outcome
- economic yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated CO2 caused significant increase in economic yield.”
t0“wheat”
Claim · model-written summary
Elevated O3 significantly reduced wheat yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- elevated O3e0
- Outcome
- yielde0
- Direction
- reductione0
- Qualifier
- cultivar-specifice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to elevated O3 caused significant reduction in yield and the effect was cultivar-specific.”
t0“wheat”
Claim · model-written summary
Elevated CO2 ameliorated the negative impact of elevated O3.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- elevated CO2e0
- Outcome
- negative impact of elevated O3e0
- Direction
- amelioratede0
- Comparator
- elevated O3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO2 ameliorated the negative impact of elevated O3 and cultivar HUW-37 was more sensitive to elevated O3 than K-9107”
t0“wheat”
Claim · model-written summary
HUW-37 was more sensitive to elevated O3 than K-9107.
- Taxon
- wheatTriticum aestivumt0
- Material
- HUW-37e0
- Outcome
- sensitive to elevated O3e0
- Direction
- moree0
- Comparator
- K-9107e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivar HUW-37 was more sensitive to elevated O3 than K-9107”
t0“wheat”
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