Abstract
Interactive effects of root restriction and atmospheric CO(2) enrichment on plant growth, photosynthetic capacity, and carbohydrate partitioning were studied in cotton seedlings (Gossypium hirsutum L.) grown for 28 days in three atmospheric CO(2) partial pressures (270, 350, and 650 microbars) and two pot sizes (0.38 and 1.75 liters). Some plants were transplanted from small pots into large pots after 20 days. Reduction of root biomass resulting from growth in small pots was accompanied by decreased shoot biomass and leaf area. When root growth was less restricted, plants exposed to higher CO(2) partial pressures produced more shoot and root biomass than plants exposed to lower levels of CO(2). In small pots, whole plant biomass and leaf area of plants grown in 270 and 350 microbars of CO(2) were not significantly different. Plants grown in small pots in 650 microbars of CO(2) produced greater total biomass than plants grown in 350 microbars, but the dry weight gain was found to be primarily an accumulation of leaf starch. Reduced photosynthetic capacity of plants grown at elevated levels of CO(2) was clearly associated with inadequate rooting volume. Reductions in net photosynthesis were not associated with decreased stomatal conductance. Reduced carboxylation efficiency in response to CO(2) enrichment occurred only when root growth was restricted suggesting that ribulose-1,5-bisphosphate carboxylase/oxygenase activity may be responsive to plant source-sink balance rather than to CO(2) concentration as a single factor. When root-restricted plants were transplanted into large pots, carboxylation efficiency and ribulose-1,5-bisphosphate regeneration capacity increased indicating that acclimation of photosynthesis was reversible. Reductions in photosynthetic capacity as root growth was progressively restricted suggest sink-limited feedback inhibition as a possible mechanism for regulating net photosynthesis of plants grown in elevated CO(2).
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 13
Claim · model-written summary
Growth in small pots reduced root biomass of cotton seedlings.
- Taxon
- Gossypium hirsutum L.
Gossypium hirsutume0 - Treatment
- growth in small potse1
- Outcome
- root biomasse1
- Direction
- Reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Reduction of root biomass resulting from growth in small pots”
Claim · model-written summary
Growth in small pots, with its reduced root biomass, was accompanied by decreased shoot biomass and leaf area.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- growth in small potse1
- Outcome
- shoot biomass and leaf areae1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Reduction of root biomass resulting from growth in small pots was accompanied by decreased shoot biomass and leaf area”
Claim · model-written summary
When root growth was less restricted, plants at higher CO2 partial pressures produced more shoot and root biomass than plants at lower CO2.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- higher CO(2) partial pressurese1
- Outcome
- shoot and root biomasse1
- Direction
- moree1
- Qualifier
- When root growth was less restrictede1
- Comparator
- lower levels of CO(2)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“When root growth was less restricted, plants exposed to higher CO(2) partial pressures produced more shoot and root biomass than plants exposed to lower levels of CO(2)”
Claim · model-written summary
In small pots, whole plant biomass and leaf area did not differ significantly between plants grown at 270 and 350 microbars of CO2.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- 270 and 350 microbars of CO(2)e1
- Outcome
- whole plant biomass and leaf areae1
- Direction
- not significantly differente1
- Setting
- In small potse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“In small pots, whole plant biomass and leaf area of plants grown in 270 and 350 microbars of CO(2) were not significantly different”
Claim · model-written summary
In small pots, plants grown at 650 microbars of CO2 produced greater total biomass than plants grown at 350 microbars.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- 650 microbars of CO(2)e1
- Outcome
- total biomasse1
- Direction
- greatere1
- Comparator
- 350 microbarse1
- Setting
- in small potse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Plants grown in small pots in 650 microbars of CO(2) produced greater total biomass than plants grown in 350 microbars”
Claim · model-written summary
The extra dry weight gained at 650 microbars CO2 in small pots was primarily an accumulation of leaf starch.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Organ / stage
- leafe1
- Outcome
- primarily an accumulation of leaf starche1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“the dry weight gain was found to be primarily an accumulation of leaf starch”
Claim · model-written summary
Reduced photosynthetic capacity of plants grown at elevated CO2 was clearly associated with inadequate rooting volume.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- elevated levels of CO(2)e1
- Outcome
- photosynthetic capacitye1
- Direction
- Reducede1
- Qualifier
- inadequate rooting volumee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Reduced photosynthetic capacity of plants grown at elevated levels of CO(2) was clearly associated with inadequate rooting volume”
Claim · model-written summary
Reductions in net photosynthesis were not associated with decreased stomatal conductance.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Outcome
- net photosynthesise1
- Direction
- Reductionse1
- Comparator
- stomatal conductancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Reductions in net photosynthesis were not associated with decreased stomatal conductance”
Claim · model-written summary
Reduced carboxylation efficiency in response to CO2 enrichment occurred only when root growth was restricted.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- CO(2) enrichmente1
- Outcome
- carboxylation efficiencye1
- Direction
- Reducede1
- Qualifier
- only when root growth was restrictede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Reduced carboxylation efficiency in response to CO(2) enrichment occurred only when root growth was restricted”
Claim · model-written summary
The authors suggest that ribulose-1,5-bisphosphate carboxylase/oxygenase activity may respond to plant source-sink balance rather than to CO2 concentration as a single factor.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Gene
- ribulose-1,5-bisphosphate carboxylase/oxygenasee1
- Outcome
- ribulose-1,5-bisphosphate carboxylase/oxygenase activitye1
- Qualifier
- plant source-sink balancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“ribulose-1,5-bisphosphate carboxylase/oxygenase activity may be responsive to plant source-sink balance rather than to CO(2) concentration as a single factor”
Claim · model-written summary
Transplanting root-restricted plants into large pots increased carboxylation efficiency and ribulose-1,5-bisphosphate regeneration capacity.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Treatment
- transplanted into large potse1
- Outcome
- carboxylation efficiency and ribulose-1,5-bisphosphate regeneration capacitye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“When root-restricted plants were transplanted into large pots, carboxylation efficiency and ribulose-1,5-bisphosphate regeneration capacity increased”
Claim · model-written summary
Acclimation of photosynthesis to elevated CO2 was reversible.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Outcome
- acclimation of photosynthesis was reversiblee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“indicating that acclimation of photosynthesis was reversible”
Claim · model-written summary
Reductions in photosynthetic capacity as root growth was progressively restricted suggest sink-limited feedback inhibition as a possible mechanism regulating net photosynthesis in elevated CO2.
- Taxon
- Gossypium hirsutum L.Gossypium hirsutume0
- Outcome
- net photosynthesise1
- Qualifier
- sink-limited feedback inhibitione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gossypium hirsutum L.”
e1“Reductions in photosynthetic capacity as root growth was progressively restricted suggest sink-limited feedback inhibition as a possible mechanism for regulating net photosynthesis of plants grown in elevated CO(2)”
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
- positive
- positive
- negative
19 papers more in this group
See all 23 papers →transplanting · growth · Gossypium hirsutum (cotton)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
5 papers more in this group
See all 9 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.