Abstract
This study was carried out in 2014 at Isfahan University of Technology, Iran, to evaluate the responses of four rice varieties (Neda, Deylamani, Shiroudi and Domsorkh) to ambient (360 ± 50 μmol/mol) and elevated (700 ± 50 μmol/mol) air carbon dioxide (CO2) concentrations under four salinity levels (0, 30, 60 and 90 mmol/L NaCl). There was significant variation among rice varieties in response to elevated CO2 concentration under the four salinity levels. Under non-saline condition, elevated CO2 increased the dry weight of Neda, Deylamani and Domsorkh by 8%, 50% and 8%, respectively, but reversely decreased that of Shiroudi by 34%. Increasing CO2 concentration significantly reduced the negative effects of salinity on Shiroudi, but these effects were even increased in Deylamani and Domsorkh under all the salinity levels and in Neda only under 30 and 60 mmol/L NaCl. Significant correlations were established between plant dry weight, SPAD value and leaf area under both CO2 levels. However, this trend was observed only at ambient CO2 concentration in the presence of soluble carbohydrates. The results revealed the genotype and salinity dependence of the effects of CO2 concentrations on the rice traits investigated.
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Claims 11
Claim · model-written summary
Rice varieties varied significantly in their response to elevated CO2 across salinity levels.
- Taxon
- rice
Oryza sativae0 - Outcome
- variation among rice varieties in response to elevated CO2 concentratione0
- Qualifier
- under the four salinity levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was significant variation among rice varieties in response to elevated CO2 concentration under the four salinity levels”
Claim · model-written summary
Elevated CO2 increased Neda dry weight by 8% without salinity.
- Taxon
- riceOryza sativat0
- Material
- Nedae0
- Treatment
- elevated CO2e0
- Outcome
- dry weighte0
- Direction
- increasede0
- Value
- 8%e0
- Qualifier
- non-saline conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline condition, elevated CO2 increased the dry weight of Neda, Deylamani and Domsorkh by 8%, 50% and 8%, respectively”
t0“Rice”
Claim · model-written summary
Elevated CO2 increased Deylamani dry weight by 50% without salinity.
- Taxon
- riceOryza sativat0
- Material
- Deylamanie0
- Treatment
- elevated CO2e0
- Outcome
- dry weighte0
- Direction
- increasede0
- Value
- 50%e0
- Qualifier
- non-saline conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline condition, elevated CO2 increased the dry weight of Neda, Deylamani and Domsorkh by 8%, 50% and 8%, respectively”
t0“Rice”
Claim · model-written summary
Elevated CO2 increased Domsorkh dry weight by 8% without salinity.
- Taxon
- riceOryza sativat0
- Material
- Domsorkhe0
- Treatment
- elevated CO2e0
- Outcome
- dry weighte0
- Direction
- increasede0
- Value
- 8%e0
- Qualifier
- non-saline conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline condition, elevated CO2 increased the dry weight of Neda, Deylamani and Domsorkh by 8%, 50% and 8%, respectively”
t0“Rice”
Claim · model-written summary
Elevated CO2 decreased Shiroudi dry weight by 34% without salinity.
- Taxon
- riceOryza sativat0
- Material
- Shiroudie0
- Treatment
- elevated CO2e0
- Outcome
- dry weighte0
- Direction
- decreasede0
- Value
- 34%e0
- Qualifier
- non-saline conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline condition, elevated CO2 increased the dry weight of Neda, Deylamani and Domsorkh by 8%, 50% and 8%, respectively, but reversely decreased that of Shiroudi by 34%”
t0“Rice”
Claim · model-written summary
Elevated CO2 reduced salinity damage in Shiroudi.
- Taxon
- riceOryza sativat0
- Material
- Shiroudie0
- Treatment
- Increasing CO2 concentratione0
- Outcome
- negative effects of salinitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing CO2 concentration significantly reduced the negative effects of salinity on Shiroudi”
t0“Rice”
Claim · model-written summary
Elevated CO2 increased salinity damage in Deylamani at all tested salinity levels.
- Taxon
- riceOryza sativat0
- Material
- Deylamanie0
- Treatment
- CO2e1
- Outcome
- these effectse0
- Direction
- increasede0
- Qualifier
- under all the salinity levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these effects were even increased in Deylamani and Domsorkh under all the salinity levels”
t0“Rice”
e1“Increasing CO2 concentration significantly reduced the negative effects of salinity on Shiroudi”
Claim · model-written summary
Elevated CO2 increased salinity damage in Domsorkh at all tested salinity levels.
- Taxon
- riceOryza sativat0
- Material
- Domsorkhe0
- Treatment
- CO2e1
- Outcome
- these effectse0
- Direction
- increasede0
- Qualifier
- under all the salinity levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these effects were even increased in Deylamani and Domsorkh under all the salinity levels”
t0“Rice”
e1“Increasing CO2 concentration significantly reduced the negative effects of salinity on Shiroudi”
Claim · model-written summary
Elevated CO2 increased salinity damage in Neda at 30 and 60 mmol/L NaCl.
- Taxon
- riceOryza sativat0
- Material
- Nedae0
- Treatment
- CO2e1
- Outcome
- these effectse0
- Direction
- increasede0
- Qualifier
- 30 and 60 mmol/L NaCle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these effects were even increased in Deylamani and Domsorkh under all the salinity levels and in Neda only under 30 and 60 mmol/L NaCl”
t0“Rice”
e1“Increasing CO2 concentration significantly reduced the negative effects of salinity on Shiroudi”
Claim · model-written summary
Plant dry weight, SPAD value and leaf area were significantly correlated under both CO2 levels.
- Taxon
- riceOryza sativat0
- Treatment
- both CO2 levelse0
- Outcome
- plant dry weight, SPAD value and leaf areae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant correlations were established between plant dry weight, SPAD value and leaf area under both CO2 levels”
t0“Rice”
Claim · model-written summary
Correlations involving soluble carbohydrates occurred only at ambient CO2.
- Taxon
- riceOryza sativat0
- Compound
- soluble carbohydratese0
- Outcome
- this trende0
- Qualifier
- only at ambient CO2 concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this trend was observed only at ambient CO2 concentration in the presence of soluble carbohydrates”
t0“Rice”
The same questions in other papers
co2 · growth · Oryza sativa (rice)Positive and negative results
99 papers in the same direction as this paper · 23 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- positive
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See all 124 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.