Abstract
The effects of elevated levels (40, 80 and 120 ppb) of ozone and elevated levels (350, 400 and 450 ppb) of carbon dioxide, alone and in combination, were studied on the germinated young tree seedling of Medicago sativa. Parameters related to growth, biochemical and leaf nutrient parameters were measured using standard methods. The results showed that elevated CO2 has an ameliorative effect on the growth of Alfalfa with increased performance in parameters related to production function of the plant. Ozone to the contrary known for its oxidative property induced and changed significantly the photosynthetic nature of the plant. Decrease in chlorophylls content as a commonly regarded biochemical damage symptom was observed in all the levels of O3 treatment. The combine treatment like similar works done in this area revealed that enrichment effect by CO2 seems to contribute to the protection against the O3 induced oxidation. The treatment effects on the leaf nutritional parameters are also evident though statistically not significant.
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Claims 5
Claim · model-written summary
Elevated CO2 improved alfalfa growth and production function parameters.
- Taxon
- Medicago sativa
Medicago sativae1 - Treatment
- elevated CO2e0
- Outcome
- growth of Alfalfae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated CO2 has an ameliorative effect on the growth of Alfalfa with increased performance in parameters related to production function of the plant”
e1“Medicago sativa”
Claim · model-written summary
Ozone significantly changed the photosynthetic nature of alfalfa.
- Taxon
- Medicago sativaMedicago sativae1
- Treatment
- Ozonee0
- Outcome
- photosynthetic nature of the plante0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ozone to the contrary known for its oxidative property induced and changed significantly the photosynthetic nature of the plant”
e1“Medicago sativa”
Claim · model-written summary
Chlorophyll content decreased at every ozone treatment level.
- Taxon
- Medicago sativaMedicago sativae1
- Treatment
- O3 treatmente0
- Outcome
- chlorophylls contente0
- Direction
- Decreasee0
- Qualifier
- all the levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decrease in chlorophylls content as a commonly regarded biochemical damage symptom was observed in all the levels of O3 treatment”
e1“Medicago sativa”
Claim · model-written summary
CO2 enrichment appeared to protect alfalfa against ozone oxidation.
- Taxon
- Medicago sativaMedicago sativae1
- Treatment
- CO2e0
- Outcome
- protection against the O3 induced oxidatione0
- Qualifier
- seems to contributee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enrichment effect by CO2 seems to contribute to the protection against the O3 induced oxidation”
e1“Medicago sativa”
Claim · model-written summary
Treatment effects on leaf nutrition were apparent but statistically nonsignificant.
- Taxon
- Medicago sativaMedicago sativae2
- Treatment
- ozone and elevated levels (350, 400 and 450 ppb) of carbon dioxidee1
- Outcome
- leaf nutritional parameterse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment effects on the leaf nutritional parameters are also evident though statistically not significant”
e1“elevated levels (40, 80 and 120 ppb) of ozone and elevated levels (350, 400 and 450 ppb) of carbon dioxide”
e2“Medicago sativa”
The same questions in other papers
co2 · growth · Medicago sativa (alfalfa)Positive and negative results
14 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
16 papers more in this group
See all 20 papers →ozone · molecular: metabolites · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- negative
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.