Abstract
Summary If atmospheric carbon dioxide concentration continues to increase, plant growth and crop yield could be affected. New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum ) were used to investigate possible intraspecific variation in the response of crop species to increased CO 2 . Because precipitation and temperature are predicted to change with the increasing atmospheric CO 2 concentration, the response of the two cultivars to the interaction between CO 2 and water stress was also examined. Seeds of the two cultivars were germinated and grown under controlled environmental conditions, in either 350 or 675 μ1 CO 2 /1. The plant water status of the two cultivars was inherently different but was little affected by the CO 2 concentration when the plants were well watered. When water was withheld for 5 days the total leaf water potential and osmotic potential decreased in both CO 2 treatments but less rapidly in high CO 2 than in low. Under low CO 2 total leaf water potential decreased to a lower value than osmotic potential. The differences were due, at least in part, to the reduced stomatal conductance and transpiration rate under high CO 2 . Increased CO 2 ameliorated the detrimental effects of drought stress on plant growth. The results indicate that increased CO 2 could differentially affect the relative drought resistance of species cultivars.
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Claims 6
Claim · model-written summary
Plant water status of tomato was little affected by high CO2 when plants were well watered.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- high CO 2e3
- Outcome
- plant water statuse2
- Direction
- no_changeinferrede2
- Qualifier
- when the plants were well waterede2
- Comparator
- lowe3
- Setting
- controlled environmental conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum )”
e2“The plant water status of the two cultivars was inherently different but was little affected by the CO 2 concentration when the plants were well watered”
e3“When water was withheld for 5 days the total leaf water potential and osmotic potential decreased in both CO 2 treatments but less rapidly in high CO 2 than in low”
e4“grown under controlled environmental conditions”
Claim · model-written summary
Withholding water for 5 days decreased total leaf and osmotic water potential in tomato, less rapidly under high CO2 than low CO2.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- withheld for 5 dayse3
- Outcome
- total leaf water potential and osmotic potentiale3
- Direction
- decreasede3
- Qualifier
- less rapidly in high CO 2e3
- Comparator
- lowe3
- Setting
- controlled environmental conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum )”
e3“When water was withheld for 5 days the total leaf water potential and osmotic potential decreased in both CO 2 treatments but less rapidly in high CO 2 than in low”
e4“grown under controlled environmental conditions”
Claim · model-written summary
Under low CO2, total leaf water potential decreased to a lower value than osmotic potential in tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- low CO 2e5
- Outcome
- total leaf water potentiale5
- Direction
- lowere5
- Comparator
- osmotic potentiale5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum )”
e5“Under low CO 2 total leaf water potential decreased to a lower value than osmotic potential”
Claim · model-written summary
The water potential difference between total leaf and osmotic potential in tomato is attributed in part to reduced stomatal conductance and transpiration under high CO2.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- differencese6
- Qualifier
- reduced stomatal conductance and transpiration rate under high CO 2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum )”
e6“The differences were due, at least in part, to the reduced stomatal conductance and transpiration rate under high CO 2”
Claim · model-written summary
High CO2 ameliorated the detrimental effects of drought stress on tomato plant growth.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- Increased CO 2e7
- Outcome
- plant growthe7
- Direction
- amelioratede7
- Comparator
- detrimental effects of drought stresse7
- Setting
- controlled environmental conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum )”
e7“Increased CO 2 ameliorated the detrimental effects of drought stress on plant growth”
e4“grown under controlled environmental conditions”
Claim · model-written summary
Increased CO2 could differentially affect the relative drought resistance of the two tomato cultivars.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- New Yorker and Better Boye1
- Treatment
- increased CO 2e7
- Outcome
- relative drought resistancee7
- Direction
- differentiallye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“New Yorker and Better Boy cultivars of tomato ( Lycopersicon esculentum )”
e7“increased CO 2 could differentially affect the relative drought resistance of species cultivars”
The same questions in other papers
co2 · physiology: water · Solanum lycopersicum (tomato)Positive and negative results
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- positive
- positive
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See all 19 papers →co2 · growth · Solanum lycopersicum (tomato)Positive and negative results
58 papers in the same direction as this paper · 15 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- positive
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See all 75 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.