Abstract
The growth characteristics of six and the reproductive development of five soybean [ Glycine max (L.) Merr.] cultivars were examined at 39 Pa (ambient) and 70 Pa (elevated) CO2 partial pressures in temperature-controlled glasshouses. Significant intraspecific variation for both growth and seed yield in response to elevated CO2 was observed among the cultivars. At elevated CO2, total biomass increased an average of 42% at the end of the vegetative stage, while average seed yield increased by only 28%. No changes in % protein or % oil were observed for any cultivar at elevated CO2, relative to ambient CO2. The relative enhancement of either vegetative or reproductive growth at elevated CO2 was not correlated with changes in the absolute or relative increase in single leaf photosynthetic rate among cultivars at elevated CO2. For soybean, the greatest response of seed yield to elevated CO2 was associated with increased production of lateral branches, increased pod production or increased seed weight, suggesting different strategies of carbon partitioning in a high CO2 environment. Data from this experiment indicates that differences in carbon partitioning among soybean cultivars may influence reproductive capacity and fecundity as atmospheric CO2 increases, with subsequent consequences for future agricultural breeding strategies.
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 9
Claim · model-written summary
Soybean cultivars varied significantly in growth response to elevated CO2.
- Taxon
- soybean
Glycine maxt0 - Material
- cultivarse0
- Treatment
- elevated CO2e0
- Outcome
- growthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant intraspecific variation for both growth and seed yield in response to elevated CO2 was observed among the cultivars.”
t0“soybean”
Claim · model-written summary
Soybean cultivars varied significantly in seed yield response to elevated CO2.
- Taxon
- soybeanGlycine maxt0
- Material
- cultivarse0
- Treatment
- elevated CO2e0
- Outcome
- seed yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant intraspecific variation for both growth and seed yield in response to elevated CO2 was observed among the cultivars.”
t0“soybean”
Claim · model-written summary
Elevated CO2 increased total biomass by an average of 42% at the end of the vegetative stage.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- vegetative stagee0
- Treatment
- elevated CO2e0
- Outcome
- total biomasse0
- Direction
- increasede0
- Value
- 42%e0
- Comparator
- ambiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At elevated CO2, total biomass increased an average of 42% at the end of the vegetative stage”
e1“39 Pa (ambient) and 70 Pa (elevated) CO2 partial pressures”
t0“soybean”
Claim · model-written summary
Elevated CO2 increased average soybean seed yield by 28%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- increased atmospheric carbon dioxidet0
- Outcome
- average seed yielde0
- Direction
- increasede0
- Value
- 28%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average seed yield increased by only 28%.”
t0“Intraspecific variation in seed yield of soybean ( Glycine max ) in response to increased atmospheric carbon dioxide”
Claim · model-written summary
Elevated CO2 did not change soybean percent protein.
- Taxon
- soybeanGlycine maxt0
- Treatment
- elevated CO2e0
- Outcome
- % proteine0
- Direction
- No changese0
- Comparator
- ambient CO2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No changes in % protein or % oil were observed for any cultivar at elevated CO2, relative to ambient CO2.”
t0“soybean”
Claim · model-written summary
Elevated CO2 did not change soybean percent oil.
- Taxon
- soybeanGlycine maxt0
- Treatment
- elevated CO2e0
- Outcome
- % oile0
- Direction
- No changese0
- Comparator
- ambient CO2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No changes in % protein or % oil were observed for any cultivar at elevated CO2, relative to ambient CO2.”
t0“soybean”
Claim · model-written summary
Growth enhancement under elevated CO2 was not correlated with single leaf photosynthetic response among cultivars.
- Taxon
- soybeanGlycine maxt0
- Material
- cultivarse0
- Outcome
- relative enhancement of either vegetative or reproductive growthe0
- Qualifier
- not correlated with changes in the absolute or relative increase in single leaf photosynthetic ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative enhancement of either vegetative or reproductive growth at elevated CO2 was not correlated with changes in the absolute or relative increase in single leaf photosynthetic rate among cultivars at elevated CO2.”
t0“soybean”
Claim · model-written summary
The greatest seed yield response to elevated CO2 was associated with increased lateral branching, pod production or seed weight.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- lateral branchese0
- Outcome
- greatest response of seed yield to elevated CO2e0
- Direction
- greateste0
- Qualifier
- increased pod production or increased seed weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For soybean, the greatest response of seed yield to elevated CO2 was associated with increased production of lateral branches, increased pod production or increased seed weight”
Claim · model-written summary
Differences in carbon partitioning among soybean cultivars may influence reproductive capacity as CO2 rises.
- Taxon
- soybeanGlycine maxe0
- Material
- cultivarse0
- Outcome
- reproductive capacity and fecunditye0
- Qualifier
- differences in carbon partitioninge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences in carbon partitioning among soybean cultivars may influence reproductive capacity and fecundity as atmospheric CO2 increases”
The same questions in other papers
co2 · quality: protein · Glycine max (soybean)Results differ
7 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- no effect
5 papers more in this group
See all 9 papers →co2 · yield · Glycine max (soybean)Positive and negative results
85 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
92 papers more in this group
See all 96 papers →co2 · growth · Glycine max (soybean)Positive and negative results
82 papers in the same direction as this paper · 16 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- positive
97 papers more in this group
See all 101 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.