Abstract
In order to investigate the underlying physiological mechanism of intraspecific variation in plant growth and yield response to elevated CO2 concentration [CO2], seven cultivars of spring wheat (Triticum aestivum L.) were grown at either ambient [CO2] (~384μmolmol-1) or elevated [CO2] (700μmolmol-1) in temperature controlled glasshouses. Grain yield increased under elevated [CO2] by an average of 38% across all seven cultivars, and this was correlated with increases in both spike number (productive tillers) (r=0.868) and aboveground biomass (r=0.942). Across all the cultivars, flag leaf photosynthesis rate (A) increased by an average of 57% at elevated [CO2]. The response of A to elevated [CO2] ranged from 31% (in cv. H45) to 75% (in cv. Silverstar). Only H45 showed A acclimation to elevated [CO2], which was characterised by lower maximum Rubisco carboxylation efficiency, maximum electron transport rate and leaf N concentration. Leaf level traits responsible for plant growth, such as leaf mass per unit area (LMA), carbon (C), N content on an area basis ([N]LA) and the C:N increased at elevated [CO2]. LMA stimulation ranged from 0% to 85% and was clearly associated with increased [N]LA. Both of these traits were positively correlated with grain yield, suggesting that differences in LMA play an important role in determining the grain yield response to elevated [CO2]. Thus increased LMA can be used as a new trait to select cultivars for a future [CO2]-rich atmosphere.
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 15
Claim · model-written summary
Elevated CO2 increased grain yield by an average of 38% across cultivars.
- Taxon
- spring wheat (Triticum aestivum L.)
Triticum aestivumt0 - Treatment
- elevated [CO2]e0
- Outcome
- Grain yielde0
- Direction
- increasede0
- Value
- 38%e0
- Comparator
- ambient [CO2]e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield increased under elevated [CO2] by an average of 38% across all seven cultivars”
t0“spring wheat (Triticum aestivum L.)”
e1“seven cultivars of spring wheat (Triticum aestivum L.) were grown at either ambient [CO2] (~384μmolmol-1) or elevated [CO2] (700μmolmol-1) in temperature controlled glasshouses”
Claim · model-written summary
Yield increase correlated with spike number increase.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Organ / stage
- spike number (productive tillers)e0
- Outcome
- Grain yielde1
- Direction
- increasese0
- Value
- r=0.868e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was correlated with increases in both spike number (productive tillers) (r=0.868)”
t0“spring wheat (Triticum aestivum L.)”
e1“Grain yield increased under elevated [CO2] by an average of 38% across all seven cultivars”
Claim · model-written summary
Yield increase correlated with aboveground biomass increase.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- elevated [CO2]e1
- Outcome
- aboveground biomasse0
- Direction
- increasese0
- Value
- r=0.942e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was correlated with increases in both spike number (productive tillers) (r=0.868) and aboveground biomass (r=0.942)”
t0“spring wheat (Triticum aestivum L.)”
e1“Grain yield increased under elevated [CO2] by an average of 38% across all seven cultivars”
Claim · model-written summary
Flag leaf photosynthesis increased by an average of 57% at elevated CO2.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Organ / stage
- flag leafe0
- Treatment
- elevated [CO2]e0
- Outcome
- flag leaf photosynthesis rate (A)e0
- Direction
- increasede0
- Value
- 57%e0
- Comparator
- ambient [CO2]e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flag leaf photosynthesis rate (A) increased by an average of 57% at elevated [CO2]”
t0“spring wheat (Triticum aestivum L.)”
e1“seven cultivars of spring wheat (Triticum aestivum L.) were grown at either ambient [CO2] (~384μmolmol-1) or elevated [CO2] (700μmolmol-1) in temperature controlled glasshouses”
Claim · model-written summary
H45 photosynthesis response to elevated CO2 was 31%.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- cv. H45e0
- Treatment
- elevated [CO2]e0
- Outcome
- response of Ae0
- Direction
- rangede0
- Value
- 31%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of A to elevated [CO2] ranged from 31% (in cv. H45) to 75% (in cv. Silverstar)”
t0“spring wheat (Triticum aestivum L.)”
Claim · model-written summary
Silverstar photosynthesis response to elevated CO2 was 75%.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- cv. Silverstare0
- Treatment
- elevated [CO2]e0
- Outcome
- response of Ae0
- Direction
- rangede0
- Value
- 75%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of A to elevated [CO2] ranged from 31% (in cv. H45) to 75% (in cv. Silverstar)”
t0“spring wheat (Triticum aestivum L.)”
Claim · model-written summary
Only H45 showed photosynthetic acclimation at elevated CO2.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- H45e0
- Treatment
- elevated [CO2]e0
- Outcome
- A acclimatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only H45 showed A acclimation to elevated [CO2]”
t0“spring wheat (Triticum aestivum L.)”
Claim · model-written summary
H45 acclimation included lower maximum Rubisco carboxylation efficiency.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- H45e1
- Outcome
- maximum Rubisco carboxylation efficiencye0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower maximum Rubisco carboxylation efficiency, maximum electron transport rate and leaf N concentration”
t0“spring wheat (Triticum aestivum L.)”
e1“Only H45 showed A acclimation to elevated [CO2]”
Claim · model-written summary
H45 acclimation included lower maximum electron transport rate.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- H45e1
- Outcome
- maximum electron transport ratee0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower maximum Rubisco carboxylation efficiency, maximum electron transport rate and leaf N concentration”
t0“spring wheat (Triticum aestivum L.)”
e1“Only H45 showed A acclimation to elevated [CO2]”
Claim · model-written summary
H45 acclimation included lower leaf N concentration.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- H45e1
- Outcome
- leaf N concentratione0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower maximum Rubisco carboxylation efficiency, maximum electron transport rate and leaf N concentration”
t0“spring wheat (Triticum aestivum L.)”
e1“Only H45 showed A acclimation to elevated [CO2]”
Claim · model-written summary
Elevated CO2 increased LMA, carbon, area-based nitrogen, and C:N.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Treatment
- elevated [CO2]e0
- Outcome
- leaf mass per unit area (LMA), carbon (C), N content on an area basis ([N]LA) and the C:Ne0
- Direction
- increasede0
- Comparator
- ambient [CO2]e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf mass per unit area (LMA), carbon (C), N content on an area basis ([N]LA) and the C:N increased at elevated [CO2]”
t0“spring wheat (Triticum aestivum L.)”
e1“seven cultivars of spring wheat (Triticum aestivum L.) were grown at either ambient [CO2] (~384μmolmol-1) or elevated [CO2] (700μmolmol-1) in temperature controlled glasshouses”
Claim · model-written summary
LMA stimulation ranged from 0% to 85%.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Outcome
- LMA stimulatione0
- Direction
- rangede0
- Value
- 0% to 85%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LMA stimulation ranged from 0% to 85%”
t0“spring wheat (Triticum aestivum L.)”
Claim · model-written summary
LMA stimulation was associated with increased area-based N.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Organ / stage
- leafe1
- Outcome
- [N]LAe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LMA stimulation ranged from 0% to 85% and was clearly associated with increased [N]LA”
t0“spring wheat (Triticum aestivum L.)”
e1“flag leaf photosynthesis rate (A) increased by an average of 57% at elevated [CO2]”
Claim · model-written summary
LMA and area-based N were positively correlated with grain yield.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Organ / stage
- leafe1
- Outcome
- grain yielde0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both of these traits were positively correlated with grain yield”
t0“spring wheat (Triticum aestivum L.)”
e1“flag leaf photosynthesis rate (A) increased by an average of 57% at elevated [CO2]”
Claim · model-written summary
Authors propose increased LMA for cultivar selection in a CO2-rich atmosphere.
- Taxon
- spring wheat (Triticum aestivum L.)Triticum aestivumt0
- Outcome
- increased LMAe0
- Qualifier
- future [CO2]-rich atmospheree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus increased LMA can be used as a new trait to select cultivars for a future [CO2]-rich atmosphere”
t0“spring wheat (Triticum aestivum L.)”
The same questions in other papers
co2 · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
68 papers in the same direction as this paper · 28 in the opposite direction
- negative
- positive
- positive
93 papers more in this group
See all 97 papers →co2 · growth · Triticum aestivum (wheat)Positive and negative results
123 papers in the same direction as this paper · 20 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- positive
141 papers more in this group
See all 145 papers →co2 · yield · Triticum aestivum (wheat)Positive and negative results
173 papers in the same direction as this paper · 29 in the opposite direction
- no effect
- positive
- positive
199 papers more in this group
See all 203 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.