Abstract
Cotton, spurred anoda, and velvetleaf were grown in controlled-environment chambers at day/night temperatures of 32/23 or 26/17 C and CO 2 concentrations of 350 or 700 ppm. After 5 weeks, CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C and by 61, 41, and 29% at 32/23 C. Increases in leaf weight accounted for over 80% of the increase in total plant weight in cotton and spurred anoda in both temperature regimes. Leaf area was not increased by CO 2 enrichment. The observed increases in dry matter production with CO 2 enrichment were caused by increased net assimilation rate. In a second experiment, plants were grown at 350 ppm CO 2 and 29/23 C day/night for 17 days before exposure to 700 ppm CO 2 at 26/17 C for 1 week. Short-term exposure to high CO 2 significantly increased net assimilation rate, dry matter production, total dry weight, leaf dry weight, and specific leaf weight in comparison with plants maintained at 350 ppm CO 2 at 26/17 C. Increases in leaf weight in response to short-term CO 2 enrichment accounted for 100, 87, and 68% of the observed increase in total plant dry weight of cotton, spurred anoda, and velvetleaf, respectively. Comparisons among the species showed that CO 2 enrichment decreased the weed/crop ratio for total dry weight, possibly indicating a potential competitive advantage for cotton under elevated CO 2 , even at suboptimum temperatures.
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 16
Claim · model-written summary
At 26/17 C, CO2 enrichment increased cotton dry matter by 38%.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- CO 2 enrichment to 700 ppme0
- Outcome
- dry matter accumulatione0
- Direction
- increasede0
- Value
- 38e0
- Qualifier
- 26/17 Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C”
Claim · model-written summary
At 26/17 C, CO2 enrichment increased spurred anoda dry matter by 26%.
- Taxon
- spurred anodae0
- Treatment
- CO 2 enrichment to 700 ppme0
- Outcome
- dry matter accumulatione0
- Direction
- increasede0
- Value
- 26e0
- Qualifier
- 26/17 Ce0
Not reportedComparator
Verbatim
e0“CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C”
Claim · model-written summary
At 26/17 C, CO2 enrichment increased velvetleaf dry matter by 29%.
- Taxon
- velvetleaf
Abutilon theophrastie0 - Treatment
- CO 2 enrichment to 700 ppme0
- Outcome
- dry matter accumulatione0
- Direction
- increasede0
- Value
- 29%e0
- Qualifier
- 26/17 Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C”
Claim · model-written summary
At 32/23 C, CO2 enrichment increased cotton dry matter by 61%.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- CO 2 enrichment to 700 ppme0
- Outcome
- dry matter accumulatione0
- Direction
- increasede0
- Value
- 61e0
- Qualifier
- 32/23 Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C and by 61, 41, and 29% at 32/23 C”
t0“Cotton”
Claim · model-written summary
At 32/23 C, CO2 enrichment increased spurred anoda dry matter by 41%.
- Taxon
- Spurred Anodat0
- Treatment
- CO 2 enrichment to 700 ppme0
- Outcome
- dry matter accumulatione0
- Direction
- increasede0
- Value
- 41e0
- Qualifier
- 32/23 Ce0
Not reportedComparator
Verbatim
e0“CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C and by 61, 41, and 29% at 32/23 C”
t0“Spurred Anoda”
Claim · model-written summary
At 32/23 C, CO2 enrichment increased velvetleaf dry matter by 29%.
- Taxon
- VelvetleafAbutilon theophrastit0
- Treatment
- CO 2 enrichment to 700 ppme0
- Outcome
- dry matter accumulatione0
- Direction
- increasede0
- Value
- 29%e0
- Qualifier
- 32/23 Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C and by 61, 41, and 29% at 32/23 C”
t0“Velvetleaf”
Claim · model-written summary
Leaf weight accounted for over 80% of cotton total plant weight increase under both temperatures.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- Increases in leaf weighte0
- Value
- over 80%e0
- Qualifier
- in both temperature regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in leaf weight accounted for over 80% of the increase in total plant weight in cotton and spurred anoda in both temperature regimes.”
Claim · model-written summary
Leaf weight accounted for over 80% of spurred anoda total plant weight increase under both temperatures.
Verbatim
e0“Increases in leaf weight accounted for over 80% of the increase in total plant weight in cotton and spurred anoda in both temperature regimes.”
Claim · model-written summary
CO2 enrichment did not increase leaf area.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- CO 2 enrichmente0
- Outcome
- Leaf areae0
- Direction
- not increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area was not increased by CO 2 enrichment.”
t0“Cotton”
Claim · model-written summary
Increased net assimilation rate explained the increase in dry matter production with CO2 enrichment.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- CO 2 enrichmente0
- Outcome
- increases in dry matter productione0
- Qualifier
- increased net assimilation ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The observed increases in dry matter production with CO 2 enrichment were caused by increased net assimilation rate.”
t0“Cotton”
Claim · model-written summary
Short-term high CO2 significantly increased net assimilation rate, dry matter production, total dry weight, leaf dry weight, and specific leaf weight.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Short-term exposure to high CO 2e0
- Outcome
- net assimilation rate, dry matter production, total dry weighte0
- Direction
- increasede0
- Comparator
- plants maintained at 350 ppm CO 2 at 26/17 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term exposure to high CO 2 significantly increased net assimilation rate, dry matter production, total dry weight, leaf dry weight, and specific leaf weight in comparison with plants maintained at 350 ppm CO 2 at 26/17 C.”
t0“Cotton”
Claim · model-written summary
Short-term high CO2 significantly increased leaf dry weight and specific leaf weight.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Short-term exposure to high CO 2e0
- Outcome
- leaf dry weight, and specific leaf weighte0
- Direction
- increasede0
- Comparator
- plants maintained at 350 ppm CO 2 at 26/17 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term exposure to high CO 2 significantly increased net assimilation rate, dry matter production, total dry weight, leaf dry weight, and specific leaf weight in comparison with plants maintained at 350 ppm CO 2 at 26/17 C.”
t0“Cotton”
Claim · model-written summary
Short-term CO2 enrichment leaf-weight increase accounted for 100% of cotton total dry-weight increase.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- Increases in leaf weighte0
- Value
- 100e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in leaf weight in response to short-term CO 2 enrichment accounted for 100, 87, and 68% of the observed increase in total plant dry weight of cotton, spurred anoda, and velvetleaf, respectively.”
Claim · model-written summary
Short-term CO2 enrichment leaf-weight increase accounted for 87% of spurred anoda total dry-weight increase.
Verbatim
e0“Increases in leaf weight in response to short-term CO 2 enrichment accounted for 100, 87, and 68% of the observed increase in total plant dry weight of cotton, spurred anoda, and velvetleaf, respectively.”
Claim · model-written summary
Short-term CO2 enrichment leaf-weight increase accounted for 68% of velvetleaf total dry-weight increase.
- Taxon
- velvetleafAbutilon theophrastie0
- Outcome
- Increases in leaf weighte0
- Value
- 68%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in leaf weight in response to short-term CO 2 enrichment accounted for 100, 87, and 68% of the observed increase in total plant dry weight of cotton, spurred anoda, and velvetleaf, respectively.”
Claim · model-written summary
CO2 enrichment decreased the weed/crop ratio of total dry weight.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- CO 2 enrichmente0
- Outcome
- weed/crop ratio for total dry weighte0
- Direction
- decreasede0
- Qualifier
- possibly indicating a potential competitive advantage for cottone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 enrichment decreased the weed/crop ratio for total dry weight, possibly indicating a potential competitive advantage for cotton under elevated CO 2 , even at suboptimum temperatures.”
The same questions in other papers
co2 · growth · Gossypium hirsutum (cotton)Results differ
17 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
19 papers more in this group
See all 23 papers →co2 · yield · Abutilon theophrasti (velvetleaf)Positive and negative results
2 in the opposite direction
- no effect
- no effect
co2 · yield · Gossypium hirsutum (cotton)Positive and negative results
14 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- no effect
14 papers more in this group
See all 18 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.